Poa annua (Annual Meadow Grass)

Common Names

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Click on the language to view common names.

Common Names in Chinese:

Zao Shu He

Common Names in Danish:

Enårig Rapgræs

Common Names in Dutch:

Straatgras, Tuintjesgras

Common Names in English:

Annual Blue Grass, Annual Bluegrass, Annual Meadow Grass, Annual Meadow-Grass, Walkgrass

Common Names in Estonian:

Murunurmikas

Common Names in Finnish:

Kylänurmikka

Common Names in French:

Pâturin Annuel

Common Names in German:

Einjähriges Rispengras, Einjahrs-Rispengras (Austria), Spitzgras

Common Names in Greek:

Poa I Etisia

Common Names in Hebrew:

Sisanit Chad-Shenatit -

Common Names in Hungarian:

Nyári Perje

Common Names in Italian:

Fienarola Annuale, Gramigna Delle Vie, Gramigua Delle Vie

Common Names in Japanese:

Suzume No Katabira

Common Names in Norwegian:

Tunrapp

Common Names in Polish:

Wiechlina Roczna, Wyklina Roczna

Common Names in Portuguese:

Cabelo De Cão

Common Names in Russian:

мятлик однолетний, Mjatlik Odnoletnij

Common Names in Spanish:

Espiguilla, Espiguilla Anual, Hierba De Punta, Poa Anual, Porotito De Invierno (Argentina)

Common Names in Swedish:

Vitgröe, Vitgröe

Common Names in Turkish:

Yillik Salkim Otu

Description

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Family Poaceae

Annual or perennial herbs, or tall woody bamboos . Flowering stems (culms ) jointed , internodes hollow or solid; branches arising singly from nodes and subtended by a leaf sheath and 2-keeled prophyll, often fascicled in bamboos. Leaves arranged alternately in 2 ranks , differentiated into sheath, blade , and an adaxial erect appendage at sheath/blade junction (ligule) ; leaf sheath surrounding and supporting culm-internode, split to base or infrequently tubular with partially or completely fused margins , modified with reduced blade in bamboos (culm sheaths) ; leaf blades divergent, usually long, narrow and flat, but varying from inrolled and filiform to ovate , veins parallel, sometimes with cross-connecting veinlets (especially in bamboos) ; ligule membranous or a line of hairs . Inflorescence terminal or axillary , an open, contracted , or spikelike panicle, or composed of lax to spikelike racemes arranged along an elongate central axis, or digitate, paired , or occasionally solitary; axillary inflorescences often many, subtended by spatheoles (specialized bladeless leaf sheaths) and gathered into a leafy compound panicle; spikelets often aggregated into complex clusters in bamboos. Spikelets composed of distichous bracts arranged along a slender axis (rachilla) ; typically 2 lowest bracts (glumes ) empty, subtending 1 to many florets ; glumes often poorly differentiated from accompanying bracts in bamboos. Florets composed of 2 opposing bracts enclosing a single small flower, outer bract (lemma) clasping the more delicate, usually 2-keeled inner bract (palea) ; base of floret often with thickened prolongation articulated with rachilla (callus) ; lemma often with apical or dorsal bristle (awn ), glumes also sometimes awned . Flowers bisexual or unisexual ; lodicules (small scales representing perianth) 2, rarely 3 or absent, 3 to many in bamboos, hyaline or fleshy ; stamens 3 rarely 1, 2, 6, or more in some bamboos, hypogynous, filaments capillary , anthers versatile; ovary 1-celled, styles (1 or) 2(rarely 3), free or united at base, topped by feathery stigmas, exserted from sides or apex of floret. Fruit normally a dry indehiscent caryopsis with thin pericarp firmly adherent to seed, pericarp rarely free, fleshy in some bamboos; embryo small or large; hilum punctate to linear .

About 700 genera and 11,000 species: widely distributed in all regions of the world.[1]

Genus Poa

Annuals or perennials . Culm bases infrequently swollen, or with bulbous sheath bases; new shoots intravaginal or extravaginal , rarely (in China) pseudointravaginal, intravaginal but with reduced or rudimentary lower leaf blades and weakly differentiated prophyl. Uppermost culm leaf sheath closed from 1/20th to entire length ; ligule hyaline , membranous or infrequently papery ; blade flat, folded, or involute , abaxially keeled , adaxially with 1 groove on either side of the midvein , apex prow-tipped. Inflorescence a terminal panicle; branches 1-9 per node; flowers all bisexual , or mixed bisexual and female (rarely male), with distal female flowers within spikelets , or with partially to wholly female spikelets or inflorescences. Spikelets laterally compressed , florets (1-) 2-8(-10), rachilla disarticulating above glumes and between florets, uppermost floret vestigial; vivipary sometimes present; glumes mostly strongly keeled, unequal, or subequal , lower glume 1- or 3-veined, upper glume 3(or 5) -veined; lemmas laterally compressed, usually distinctly keeled, 5(-7) -veined, distal margins and apex membranous, apex awnless, rarely minutely mucronate ; floret callus short, truncate , blunt , glabrous or webbed (with a dorsal tuft of woolly hairs ), rarely with a line of hairs around base of lemma; palea subequal or infrequently to 2/3 as long as lemma, not gaping , keels green, distinctly separated, usually scabrid , smooth in Poa sect. Micrantherae, sometimes pilulose to villous , margins usually smooth, glabrous. Lodicules 2. Stamens 3, anthers sometimes vestigial. Ovary glabrous. Caryopsis oblong to fusiform , triangular to oval in cross section , sometimes grooved , free or adhering to the palea. 2n = 14-266. x = 7.

More than 500 species: throughout Arctic and N and S temperate regions and extending to most subtropical and tropical mountains, in habitats such as temperate forests, mountain slopes , grasslands, wetlands, steppes , alpine areas and tundra , deserts, and around human habitation, on acidic to sub-basic or subsaline, dry to wet soils, from sea level to the upper limits of vegetation; 81 species (14 endemic, at least one introduced ) in China.

Poa includes many species useful and important for forage , soil stabilization, and lawns, and several widespread weeds . Five of six recognized subgenera are present in China. (1) Poa subg. Arctopoa: stout plants with thick rhizomes, scabrid to ciliate lemma margins, and glabrous calluses, found in subsaline to subalkaline wetlands. (2) Poa subg. Ochlopoa: plants with bulbous sheathed culm bases (spikelets then often viviparous), or if not bulbous then commonly quite smooth throughout, with shortly villous palea keels and no callus hairs, sometimes annuals. (3) Poa subg. Pseudopoa: slender annuals with scabrid-angled panicle branches, shortish glumes, uppermost culm sheaths closed for 1/15-1/10 their length, glabrous calluses, and scabrid rachillas. (4) Poa subg. Poa: the largest and most diverse subgenus , including annuals and perennials, with or without rhizomes, but generally with the uppermost culm sheaths closed for over 1/4 their length. (5) Poa subg. Stenopoa: commonly tufted perennials generally with the uppermost culm sheaths closed for only 1/15-1/5(-1/4) their length, with mainly extravaginal shoots, mostly without rhizomes, mostly with panicle branches that are scabrid angled from the base, and with 3-veined first glumes.

Some species have races with florets that develop into bulbils that can readily send down roots as soon as they drop from the inflorescence (i.e. , they are viviparous). Viviparous spikelets often have fairly normal-looking proximal florets. Pubescence on the lemmas and calluses of such florets is often poorly developed relative to that in normal spikelets, or absent. Identification is easiest with plants having normal spikelets.

Hybridization and facultative apomixis are common in some subgenera, especially Poa subg. Poa and P. subg. Stenopoa, and the vast majority of species studied are polyploid.[2]

Physical Description

Species Poa annua

Annuals , sometimes over wintering , infrequently stoloniferous . Culms loosely tufted , erect or oblique , often decumbent , often geniculate , soft, 6-30(-45) cm tall, smooth , nodes 1 or 2(or 3), 1(or 2) exserted. Leaf sheath slightly compressed , thin, smooth, uppermost closed for ca. 1/3 of length ; blade light to dark green, flat or folded, thin, 2-12 cm × (0.8-) 1-3.5 mm, margins slightly scabrid , apex acutely prow-tipped; ligules 0.6-3 mm, abaxially smooth, glabrous , apex obtuse , margin irregularly dentate , smooth. Panicle open, moderately congested , broadly ovoid to pyramidal , (1-) 3-10 cm, as long as wide; branches ascending , spreading , or a few reflexed , 1 or 2(-3) per node, smooth, longest with usually 3-5 spikelets in distal 1/2. Spikelets ovate to oblong , dark to light green, (3-) 4-5.5 mm, florets 3-5, distal fertile florets often female; vivipary absent; rachilla internodes 0.5-1.5 mm, smooth, glabrous, hidden or exposed; glumes unequal, smooth or rarely keeled with hooks, lower glume lanceolate and acute to subflabellate and obtuse, 1.5-2(-3) mm, 1-veined, upper glume elliptic , 2-3(-4) mm, 3-veined, the margin angled; lemmas ovate, 2.2-3.5 mm, apex and margins broadly membranous, intermediate veins prominent , keel and marginal , and usually intermediate, veins villous in the lower 1/2, rarely glabrous throughout; callus glabrous; palea keels smooth, densely pilulose to short villous . Anthers 0.6-1 mm, usually at least 2 × as long as wide, or vestigial. Fl. Apr-May, fr. Apr-Jul. 2n = 28. [source]

Poa annua is easily distinguished from other short-anthered Poa, other than P. infirma, by the annual habit, absence of a web on the callus, and the near absence of hooks on the panicle branches and spikelet bracts, in combination with densely pubescent palea keels that lack hooked prickle hairs at the apex. Plants with glabrous florets are sporadically encountered. [source]

Plants perennating by short stolons rooting at the nodes appear to develop repeatedly but sporadically at various elevations with prolonged, cool, mesic growing conditions, possibly in response to trampling. These are sometimes placed in var. reptans. Such plants have been recorded from Yunnan. [source]

Habit: Graminoid

Flowers: Bloom Period: April, May. • Flower Color: pale green

Size/Age/Growth

Size: 6-12" tall.

Habitat

Weed of disturbed , often moist and shady ground ; near sea level to 4800 m. [3].

Typically found at an altitude of 0 to 4,653 meters (0 to 15,266 feet).[4]

Biology

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Reproduction

Duration: Annual , Biennial

Growth

Sunlight: Sun Exposure: Full Sun .

Taxonomy

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Domain: Eukaryota () - Whittaker & Margulis,1978 - eukaryotes
- Kingdom: Plantae () - Haeckel, 1866 - Plants
  - Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
    - Phylum: Tracheophyta () - Sinnott, 1935 Ex Cavalier-Smith, 1998 - Vascular Plants
      - Subphylum: Euphyllophytina ()
        Infraphylum: Radiatopses () - Kenrick & Crane, 1997
        Class: Liliopsida () - Scopoli, 1760
        Subclass: Commelinidae () - Takhtajan, 1967
        Superorder: Poanae () - (Small, 1903) Takhtajan, 1997 Ex Reveal & Doweld, 1999
        Order: Poales () - Small, 1903
        Family: Poaceae () - (R. Brown) Barnhart, 1895 - Grass Family
        Subfamily: Pooideae ()
        Tribe: Poeae ()
        Genus: Poa () - Linnaeus, Sp. Pl. 1: 67. 1753. - Bluegrass
        Specific epithet: annua - Linnaeus, Sp. Pl. 1: 68. 1753.
        Botanical name: - Poa annua

Unambiguous Synonyms

Ochlopoa annua (L.) H. Scholz
P. annua var. reptans Haussknecht
P. crassinervis Honda.
Poa annua f. reptans (Haussknecht) T. Koyama
Poa annua var. aquatica Aschers.
Poa annua var. reptans Hausskn.

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: 15-Mar-2000

Place of publication : Sp. pl. 1:68. 1753

Name verified on 13-May-1992 by ARS Systematic Botanists. Last updated: 20-Nov-2007

Similar Species

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Members of the genus Poa

ZipcodeZoo has pages for 1626 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them:

P. abbreviata (Northern Bluegrass) · P. abietina · P. abortiva · P. abyssinica · P. achrochaeta · P. acicularifolia · P. acicularis · P. acinaciphylla · P. acmocalyx · P. acrochaeta · P. acroleuca · P. acroleuca var. ryukyuensis · P. acuminata · P. acuticaulis · P. acutiflora · P. acutifolia · P. acutiglumis · P. acutissima · P. adjarica · P. adspersa · P. adusta · P. aegyptiaca · P. aemensis · P. aequatoriensis · P. aequigluma · P. aestivalis · P. affinis · P. afghanica · P. agassizensis · P. agrostidea · P. airoides · P. aitchisonii · P. akmanii · P. aksuensis · P. alascana · P. alata · P. alba · P. alberti · P. albescens · P. albida · P. alcea · P. alexeenkoi · P. alexeji · P. algida · P. almasovii · P. alopecurioides 'Woodside' · P. alopecurus · P. alopecurus alopecurus · P. alopecurus subsp · P. alpicola · P. alpigena · P. alpina (Alpine Meadow Grass) · P. alpina f. vivipara (Alpine Bluegrass) · P. alpina minor · P. alpina nodosa · P. alpina alpina · P. alpina var. bivonae · P. alpina var. brevifolia · P. alpina var. minor · P. alpina var. purpurascens · P. alpina vivipara · P. alsodes (Grove Bluegrass) · P. alta · P. altaica · P. alternans · P. altissima · P. altoperuana · P. amabilis · P. ambigua · P. amboinensis · P. amboinicia · P. ammophila · P. amoena · P. ampla · P. amplexicaulis · P. anadyrica · P. anae · P. anceps · P. anceps condensata · P. andicola · P. andina · P. andina spicata · P. andina var. major · P. androgyna · P. anfamensis · P. angusta · P. angustata · P. angustifolia · P. angustifolia var. angustiglumis · P. angustiglumis · P. ankaratrensis · P. annua (Annual Meadow-Grass) · P. annua f. purpurea · P. annua f. reptans (Creeping Bluegrass) · P. annua pilantha · P. annua reptans · P. annua rigidiuscula · P. annua var. nepalensis · P. annua var. rigidiuscula · P. annua var. stricta

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Chloris platensis argentina / por Crist�bal M. Hicken. Buenos Aires: J.A. Alsina, 1910. SPA url p. 48.
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Conspectul florei Rom�niei. Plantele vasculare indigene si cele naturalizate ce se gasesc pe teritoriul Rom�niei, considerate subt punctul de vedere sistematic si geografic, de D. Grecescu. Bucuresti, Tip. Dreptatea, 1898. RUM url p. 618.
Contribuci�n al estudio de la flora del Tandil, por C. Spegazzini. La Plata, 1901. SPA url p. 56.
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Contributions to the botany of Vermont. Burlington, Vt.: Botanical Dept., University of Vermont, 1898-1911. ENG url p. 15.
Dansk plantevaekst / af Eug. Warming. K�benhavn og Kristiania: Gyldendal, 1906-1909. DAN url p. 217.
Das natrliche System des Pflanzenreiches nachgewiesen in der Flora von Jena. Jena, Hochhausen, 1839. GER url p. 164.
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De montium inter Vistritium et Nissam fluvios sitorum flora / auctor Richard Sadebeck. Vratislaviae: Typ. officinae A. Neumanni, 1864. LAT url p. 38.
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Denkschriften der Kniglich-Baierischen Botanischen Gesellschaft in Regensburg. Regensburg: In Commission der Montag- und Weissischen Buchh., 1815- GER url p. 91, p. 92.
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Despre vegetatiunea Rom�niei: si exploratorii ei cu date asupra climei si a regiuniloru botanice / de D. Br�ndza; si respunsulu D-lui Gregoriu Stefanescu. Bucuresci: Tipografia Academiei Rom�ne, 1880. RUM url p. 61.
Det Kongelige Norske videnskabers selskabs skrifter. Trondhjem: Aktietrykkeriet, -1969. DAN url p. 111, p. 15.
Deutsche S�dpolar-Expedition, 1901-1903, im Auftrage des Reichsamtes des Innern, hrsg. von Erich von Drygalski. Berlin, G. Reimer, 1905-1931. GER url p. 103, p. 119, p. 175, p. 265, p. 267, p. 269, p. 350, p. 351.
Deutsche botanische Monatsschrift. [Sondershausen: Verlag der Redaktion, 1883-1912]. GER url p. 141, p. 229, p. 318, p. 319.
Die Flora des Puschlav (Bezirk Bernina, Kanton Graub�nden) von H. Brockmann-Jerosch. Leipzig, W. Engelmann, 1907. GER url p. 73.
Die Flora von K�rnten. Klagenfurt, Kleinmayr, 1853. GER url p. 114.
Die Forschungsreise S. M. S. "Gazelle" in den Jahren 1874 bis 1876: unter Kommando des Kapit�n See Freiherrn von Schleinitz / herausgegeben von dem Hydrogrphischen Amt des Reishs-Marine-Amts. Berlin: E. S. Mittler und Sohn, 1889-90. GER url p. 12.
Die Gartenwelt. Berlin: G. Schmidt, [1897- GER url p. 346, p. 368, p. 82.
Die Gef�sspflanzen der Magellansl�nder; nebst einem Beitrage zur Flora der Ostk�ste von Patagonien. Stockholm, P.A. Norstedt, 1900. GER url p. 223.
Die Gross-Schmetterlinge der Erde: eine systematische Bearbeitung der bis jetzt bekannten Gross-Schmetterlinge / von Professor Dr. Adalbert Seitz. Stuttgart: Alfred Kernen, 1909- GER url p. 105, p. 106, p. 129, p. 137, p. 96.
Die Lehre von der Pflanzenzelle / von Wilh. Hofmeister. Leipzig: Engelmann, 1867. GER url p. 430, p. 437, p. 621.
Die Lepidopteren der Schweiz, von Prof. Dr. Heinrich Frey. Leipzig, W. Engelmann, 1880. GER url p. 45, p. 47.
Die Nahrpflanzen der in Europa lebenden Raupen der Grossschmetterlinge und ihre Bewohner / systematisch geordnet von Fr. Meyer. Frankfurt am Main: Entomologische Zeitschrift, 1919. GER url p. 47.
Die Nat�rlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begr�ndet von A. Engler und K. Prantl, fortgesetzt von A. Engler Leipzig, W. Engelmann, 1887-1909. GER url p. 17.
Die Ostsudeten; eine floristische Skizze. Br�nn, Landesdurch-forschungs-Komemission, 1914. GER url p. 16, p. 22, p. 30, p. 74, p. 80.
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Die Pflanzendecke �sterreich-Ungarns. Auf Grund fremder und eigener Forschungen geschildert, von Dr. August Edler von Hayek. Hrsg. mit einem Druckkostenbeitrag der Kaiserlichen Akademie der Wissenschaften in Wien. Leipzig, F. Deuticke, 1916- [i.e. 1914] GER url p. 114.
Die Pflanzenfeinde aus der Klasse der Insekten. Ein nach Pflanzenfamilien geordnetes Handbuch s�mmtlicher auf den einheimischen Pflanzen bisher beobachteten Insekten zum Gebrauch f�r Entomologen, Insektensammler, Botaniker, Land- und Forstwirthe un von J. Stuttgart, J. Hoffmann, 1874. GER url p. 745, p. 749, p. 751, p. 760.
Die Phanerogamen - Flora Oesels und der benachbarten Eilande und Beitrag zur Flora der Insel Runoe / von Arthur Baron v. Sass. Dorpat: Druck von H. Laakmann, 1860. GER url p. 10, p. 17, p. 73.
Die Pljesivica und ihr Verbindungszug mit dem Velebit in botanischer Hinsicht. A Pljesvica s a Velebittel �sszek�t� hegyvonulat botan. viszonyai. Von Ludwig Rossi. Budapest, Pallas Irodalmi �s Nyomdai R�szv�nyt�rsas�g, 1913. GER url p. 15.
Die Pusztenflora der grossen ungarischen Tiefebene / von Franz Woenig; mit einer farbigen Beilage und zahlreichen Pflanzenbildern im Text von Maler Ernst Kiesling; nach des Verfassers Tode herausgegeben von E.S. Z�rn. Leipzig: Verlag von Carl Meyers Graphischem Institut, 1899. GER url p. 139, p. 83.
Die Schmetterlinge Deutschlands mit besonderer Ber�cksichtigung ihrer Biologie, von Dr. Karl Eckstein Stuttgart, K.G. Lutz' Verlag[1913]-33. GER url p. 115, p. 82, p. 88.
Die bisher bekannten Pflanzen Galiziens und der Bukowina, von Josef Armin Knapp. Wien, W. Braum�ller, 1872. GER url p. 22.
Die bisher bekannten Pflanzen Slavoniens / ein Versuch von Stefan Schulzer von Mueggenburg, August Kanitz, und Josef A. Knapp. Wien: C. Czermak, 1866. GER url p. 73.
Die wirtwechselnden Rostpilze; Versuch einer Gesamtdarstellung ihrer biologischen Verhltnisse, von H. Klebahm. Berlin, Gebrder Borntraeger, 1904. GER url p. 232, p. 434, p. 436, p. 444.
Die zweite Deutsche Nordpolfahrt in den Jahren 1869 und 1870, unter F�hrung des Kapit�n Karl Koldewey / herausgegeben von dem Verein f�r die deutsche Nordpolfahrt in Bremen. Leipzig: F.A. Brockhaus, 1873-1874. GER url p. 17, p. 56.
Dos viajes bot�nicos al Rio Salado superior (Cordillera de Mendoza) ejecutados en los a�os 1891-1892 y 1892-1893. Buenos Aires, Coni, 1893. SPA url p. 28.
Dr. L. Rabenhorst's Kryptogamen-Flora von Deutschland, Oesterreich und der Schweiz Leipzig: E. Kummer, 1884-1966. GER url p. 115, p. 130, p. 220, p. 540, p. 68.
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Ensayo sobre las plantas usuales de Costa Rica / por H. Pittier. Washington, D.C.: H.L. & J.B. McQueen, 1908. SPA url p. 155.
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Enumeraci�n de las plantas europ�as que se hallan como silvestres en la provincia de Buenos Aires y en Patagonia. Buenos Aires, Impr. de Pablo E. Coni, 1877. SPA url p. 19, p. 24.
Enumeratio plantarum Transsilvaniae: exhiben: stirpes phanerogamas sponte crescentes atque frequentius cultas, cryptogamas vasculares, charceas, etiam muscos hepaticasque / auctore Phil. Johanne Ferdinando Schur. Vindobonae: Apud G. Braumhuller, 1866. GER url p. 778.
Enumeratio plantarum anno 1890 in Caucaso lectarum: additis nonnullis speciebus a claris viris H. Lojka, G. Radde, N. Seidlitz et fratr. Brotherus in eadem ditione lectis / S. Sommier et E. Levier, cum tabulis lithographicis XLIX ab E. Levier et C. Cuisi Petropoli: Typ. Imp. akademii nauk, 1900. FRE url p. 449.
Erd�ly ed�nyes fl�r�j�nak helyesbitett foglalata / Enumeratio florae transsilvanicae vesculosae critica / ex mandato Societatis Scientiarum Naturalium Regiae Hungaricae scripsit Ludovicus Simonkai. a Kir. Magyar Term�szettudom�nyi T�rsulat megbiz�s�bol ir Budapest: Kiadja a Kir. Magyar Term�szettudom�nyi T�rsulat, 1886. HUN url p. 578.
Erythea. a journal of botany, West American and general. Berkeley, Calif., University of California, 1893-1922. ENG url p. 129, p. 65.
Esercitazioni Accademiche degli Aspiranti Naturalisti / diretti dal O. G. Costa. Napoli. url p. 31, p. 66.
Essex naturalist: being the journal of the Essex Field Club. Buckhurst Hill, Essex, The Club. ENG url p. 63, p. 64, p. 77.
Etudes de l�pidopt�rologie compar�e, par Charles Oberth�r. Rennes: Impr. Oberth�r, 1904-25. FRE url p. 110, p. 174, p. 189, p. 49, p. 50, p. 79.
Experiment station record. Washington: G.P.O., 1889-1946. ENG url p. 1035, p. 1071, p. 1182, p. 165, p. 285, p. 32, p. 546, p. 562, p. 598, p. 743, p. 751, p. 981.
Family #15, Gramineae / Richard W. Pohl. [Chicago]: Field Museum of Natural History, 1980. ENG url p. 165, p. 487, p. 605.
Fauna, flora & geology of the Clyde area, ed. by G.F. Scott Elliot, Malcolm Laurie and J. Barclay Murdoch. Glasgow, Pub. by the local committee for the meeting of the British Association, 1901. ENG url p. 130.
Femhundra afbildningar af mera allm�nt f�rekommande svenska v�xter: f�r skolan och hemmet / med text af N. J. Andersson. Stockholm: Z. Haeggstr�m, 1870. SWE url p. 86.
Ferns and flowering plants of South Dakota / D.A. Saunders. Brookings: U.S. Experiment Station, South Dakota: 1899. ENG url p. 117.
Flora Aconiensis; seu, Plantarum in Novariensi Provincia sponte nascentium descriptio. [Novara]Ex Typographia Viglevanensi, 1808. LAT url p. 28.
Flora Altaica; scripsit Carolus Fridericus a Ledebour, adiutoribus Car. Ant. Meyer et Al. a Bunge. Berolini, G. Reimeri, 1829-33. LAT url p. 95.
Flora Baicalensi-Dahurica, seu, Descriptio plantarum in regionibus Cis- et Transbaicalensibus atque in Dahuria sponte nascentium / auctore Nicolao Turczaninow. Mosquae: A. Semen, 1842-1856. LAT url p. 327.
Flora Berolinensis, sive, Descriptio plantarum phanerogamarum circa Berolinum sponte crescentium vel in agris cultarum, additis Filicibus et Charis, curante Ioanne Friderico Brandt. Berolini, In Bibliopolio Flittneriano, 1825. LAT url p. 43.
Flora Berolinensis, sive, Enumeratio plantarum circa Berolinum sponte crescentium secundum familias naturales disposita / auctore Carolo Sigismundo Kunth. Berolini: Duncker et Humblot, 1838. LAT url p. 385.
Flora Brunsvicensis, oder, Aufzhlung und Beschreibung der in der Umgegend von Braunschweig wildwachsenden Pflanzen / vom H.W.L. Lachmann. Braunschweig: G.C.E. Meyer, 1827-1831. GER url p. 248.
Flora Capensis: sistens plantas promontorii Bon Spei Africes: secundum systema sexuale emendatum / Carol. Pet. Thunberg. Hafniae: Apud G. Bonnierum, 1818-1820. LAT url p. 18.
Flora Comense: disposta secondo il sistema di Linneo / dal professore Giuseppe Comolli. Como: C.P. Ostinelli, 1834-1857. ITA url p. 108.
Flora Germanica / autore Henrico Adolpho Schrader. t. 1. Gottingae: Apud H. Dieterich, 1806. LAT url p. 299, p. 304.
Flora Italica; sistens plantas in Italia et in insulis circumstantibus sponte nascentes. Bononiae, R. Masi, 1833-1854. LAT url p. 459, p. 530, p. 765.
Flora Peoriana; the vegetation in the climate of middle Illinois. Peoria, Ill., J. W. Franks, 1887. ENG url p. 40, p. 64.
Flora Petropolitana. Sistens plantas in Gubernio Petropolitano sponte crescentes, tam eas quae olim in Flora Ingrica Krascheninnikovii a Gortero enumeratae sunt, quam novas post annum 1764 hucuque a variis botanicis Petro curante Gregorio Sobolewskj. Petropoli, Typis Collegii Imperialis Medici, 1799. LAT url p. 23.
Flora Saxonica. Die Flora von Sachsen, ein botanisches Excursionsbuch Nebst Schlssel zum erleichterten Bestimmen der Gattungen nach Linnee's Sexualsystem. Hrsg. von H.G.L. Reichenbach. Dresden, In der Arnoldischen Buchh., 1844. GER url p. 29.
Flora Veneta, seu Enumeratio plantarum circa Venetiam nascentium, secundum methodum Linnanam disposita / auctore Stephano Moricand. Vol. I. Genev: Ex Typ. J.J. Paschoud, 1820. LAT url p. 48.
Flora balearica, �tude phytog�ographique sur les �les Bal�ares, par Herman Knoche. [Montpellier, France, Imp. Roum�gous et D�han]1921-1923. FRE url p. 309, p. 311, p. 525.
Flora dei lidi veneti / di G. Ruchinger. Venezia: Presso Gio. Giacomo Fuchs: 1818. ITA url p. 26.
Flora del Modenese e del Reggiano / dei Professori G. Gibelli e R. Pirotta. Modena: Tip. di G.T. Vincenzi, 1882. ITA url p. 181.
Flora dell'isola di Pantelleria. Firenze, M. Ricci, 1922. ITA url p. 89.
Flora der Gegend um den Ursprung der Donau und des Neckars: dann vom Einfluss der Schussen in den Bodensee bis zum Einfluss der Kinzig in den Rhein / hrsg. von den Verfassern der Verzeichnisse der Naturprodukte dieser Gegenden. Donaueschingen: A. Wilibald, 1804-1814. GER url p. 190, p. 193.
Flora der Insel Moon, nebst orographisch-geognostischer Darstellung ihres Bodens. Dorpat, H. Laakmann, 1854. GER url p. 61.
Flora der Nordfriesischen Inseln / von Paul Knuth. Kiel; Lipsius & Tischer, 1895. GER url p. 147.
Flora der Schweiz, von Joh. Hegetschweiler. Fortgesetzt und hrsg. von Osw. Heer. Zrich, F. Schulthess, 1840. GER url p. 80.
Flora der Schweiz: zum Gebrauche auf Exkursionen, in Schulen und beim Selbstunterricht / von Hans Schinz und Robert Keller. Z�rich: A. Raustein, 1909-1914. GER url p. 385.
Flora der Stadt Lemberg: oder Beschreibung, der um Lemberg wildwachsenden Pflanzen, nach ihrer Blthezeit geordnet / von Alexander Zawadski. Lemberg: Kuhn und Millikowski, 1836. GER url p. 19.
Flora der Umgebung Lemsals und Laudohns; zwei Beitr�ge zur Flora Livlands, von A. Rapp. Hrsg. und mit einer phytogeographischen Einleitung versehen von J. Klinge. Riga, W.F. H�cker, 1895. GER url p. 13, p. 86.
Flora der Umgegend von Hamburg. Hamburg, Meissner, 1846. GER url p. 500, p. 501.
Flora italiana; ossia, Descrizione delle piante che crescono spontanee o vegetano come tali in Italia e nelle isole ad essa aggaicenti; disposta secondo il metodo naturale. Firenze, Tip. Le Monnier, 1848-1896. ITA url p. 348, p. 349.
Flora melitensis nova [by] S. Sommier et A. Caruana Gatto. Firenze, Stabilimento Pellas, 1915. ITA url p. 431.
Flora of Ann Arbor and vicinity. Ann Arbor, [Mich.]: Courier Steam Print. House, 1876. ENG url p. 112.
Flora of Bermuda by Nathaniel Lord Britton New York, C. Scribner's sons, 1918. ENG url p. 32.
Flora of Colorado, by P.A. Rydberg. Fort Collins, Col., Experiment Station, 1906. ENG url p. 44, p. 44.
Flora of Costa Rica by Paul C. Standley Chicago, 1937. ENG url p. 89.
Flora of Delaware and the Eastern Shore: an annotated list of the ferns and flowering plants of the peninsula of Delaware, Maryland and Virginia. [Wilmington]: Society of Natural History of Delaware, 1946. ENG url p. 21.
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Flora of the southeastern United States; being descriptions of the seed-plants, ferns and fern-allies growing naturally in North Carolina, South Carolina, Georgia, Florida, Tennessee, Alabama, Mississippi, Arkansas, Louisiana, and in Oklahom by John Kunke New York, The author, 1913. ENG url p. 152.
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Flora padovana; ossia, Prospetto floristico e fitogeografico delle piante vascolari indigene inselvatichite o largamente coltivate crescenti nella provincia di Padova; con notizie storico-bibliografiche sulle fonti d Padova, Prem. Soc. coop. tip., 1909-1914. ITA url p. 157, p. 695, p. 697, p. 698.
Flora piacentina; ossia, Enumerazione sistematica delle piante della provincia di Piacenza, coll'indicazione delle loro stazioni, dei caratteri principali di ciascuna famiglia, dei nomi italiani, di quelli del dialetto Piacenza, Tip. F. Solari, 1877. ITA url p. 320.
Flora von Bosnien, der Herzegowina und des Sandzaks Novipazar. Wien, In Kommission bei C. Gerold, 1904. GER url p. 38.
Flora von Brixen a. E.; ein mit Standorts- und H�henangaben versehenes Verzeichnis der im weiteren Gebiete von Brixen a. E. (S�dtirol) beobachteten wildwachsenden h�heren Sporen- und Samenpflanzen, der Nutzgew�chse und Zierg Wien, Deuticke, 1911. GER url p. 36.
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Flora von Nieder-�sterreich. Handbuch zur Bestimmung s�mmtlicher in diesem Kronlande und den angrenzenden Gebieten wildwachsenden, h�ufig gebauten und verwildert vorkommenden Samenpflanzen und F�hrer zu weiteren botanischen Forsc Wein, C. Gerold, 1890-93. GER url p. 66, p. 84.
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Flora von Tirol. Ein Verzeichniss der in Tirol und Vorarlberg wild wachsenden und h�esiger gebauten Gef�sspflanzen. Mit Ber�cksichtigung ihrer Verbreitung und �rtlichen Verh�ltnisse verfasst und nach Koch's Synopsis d von Frz. Freih. v. Hausmann. Innsbruck, Wagner, 1851. GER url p. 1507.
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Notes

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Contributors

Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
Global Biodiversity Information Facility. Accessed November 14, 2007. http://www.gbif.org Mediated distribution data from 59 providers.
"Poa annua". in Flora of China Vol. 22 Page 261, 263, 264, 287, 290. Published by Missouri Botanical Garden Press. Online at EFloras.org.
USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN) [Online Database]. National Germplasm Resources Laboratory, Beltsville, Maryland. URL (April 30, 2008)

Data Sources

Accessed through GBIF Data Portal November 14, 2007:

European Environment Agency, EUNIS
GBIF-Spain, Real Jardin Botanico
, Vascular Plant Herbarium

Identifiers

Biodiversity Heritage Library NamebankID: 2661223
Catalogue of Life Accepted Name Code: ITS-41107
Global Biodiversity Information Facility Taxonkey: 14376784
Globally Unique Identifier: urn:lsid:ipni.org:names:86910-3
GRIN Nomen Number: 28904
Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 41107
U.S.D.A. Plant Symbol: POANR
Zipcode Zoo Species Identifier: 57054

Footnotes

Shou-liang Chen, De-Zhu Li, Guanghua Zhu, Zhenlan Wu, Sheng-lian Lu, Liang Liu, Zheng-ping Wang, Bi-xing Sun, Zheng-de Zhu, Nianhe Xia, Liang-zhi Jia, Zhenhua Guo, Wenli Chen, Xiang Chen, Yang Guangyao, Sylvia M. Phillips, Chris Stapleton, Robert J. Soreng, Susan G. Aiken, Nikolai N. Tzvelev, Paul M. Peterson, Stephen A. Renvoize, Marina V. Olonova & Klaus Ammann "Poaceae". in Flora of China Vol. 22. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
Guanghua Zhu, Liang Liu, Robert J. Soreng & Marina V. Olonova "Poa". in Flora of China Vol. 22 Page 1, 225, 257, 312, 315. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
"Poa annua". in Flora of China Vol. 22 Page 261, 263, 264, 287, 290. Missouri Botanical Garden Press. Online at EFloras.org. [back]
Mean = 165.500 meters (542.979 feet), Standard Deviation = 299.340 based on 20,000 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]

Poa annua

Common Names

Description

Family Poaceae

Genus Poa

Physical Description

Species Poa annua

Size/Age/Growth

Habitat

Biology

Reproduction

Growth

Taxonomy

Unambiguous Synonyms

Notes

Similar Species

Members of the genus Poa

More Info

Further Reading

Notes

Contributors

Data Sources

Identifiers

Footnotes