Overview
Interesting Facts
Common Names
Click on the language to view common names.
Common Names in English:
Six-Weeks Three-Awn Grass, Annual Bristle Grass, Six-Weeks Three-Awn, Sixweeks Threeawn
Common Names in Spanish:
Flechilla, Plumilla
Description
Genus Aristida
Perennials
, less often annuals
or suffruticose
. Culms
tufted
. Leaf blades
usually basal, rolled or rarely flat. Inflorescence a narrow or open panicle. Spikelets
with 1 floret; glumes
scarious
, narrow, unequal with the upper usually longer
, 1(-3) -veined; floret callus bearded
, obtuse
to pungent
or 2-toothed; lemma narrowly cylindrical or laterally compressed
, convolute, glabrous
or sparsely hairy
; awn
3-branched, branches arising directly from lemma apex or seated on a straight or twisted column, persistent
or disarticulating
either at base
or apex of column (always persistent in China), scabrid
. Stamens 3.
About 300 species: widely distributed in tropical
and warm-temperate regions of the world; ten species (six endemic) in China.
This genus is found on poor, dry soils in areas of low rainfall, but does not usually penetrate into true desert.[1]
Physical Description
Species Aristida adscensionis
Annual
. Culms
tufted
, erect
or geniculate
at base
, 15-55 cm tall,
branched. Leaf sheaths
smooth
, glabrous
, shorter than internodes,
laxly overlapping; leaf blades involute
, 3-20 cm, finely pointed
;
ligule ca.
0.5 mm.
Panicle usually narrow, loosely contracted
, 4-20
cm; branches short, ascending
, inserted
singly on main axis. Spikelets
gray-green or purplish green; glumes
subequal
or unequal with upper
longer
, 1-veined, scabrid
on vein
, lower glume lanceolate-oblong,
4-6.8 mm, acute, upper glume linear, 5-8 mm, obtuse
to emarginate
or apiculate
; callus ca. 0.5 mm, narrowly obtuse; lemma linear
, distinctly
longer than upper glume, 7-11 mm, laterally compressed
, smooth or
rarely scabrid in upper half, keel scabrid upward; awn
branches arising
directly from lemma apex, central branch
1-2.5 cm, laterals
slightly
shorter. Anthers
1.8-2 mm. Fl.
and fr. Jun-Oct. [source]
Aristida adscensionis is a widely distributed, variable, annual
pioneer of dry, open places, recognized by its long, parallel-sided,
flattened lemma often exserted from the glumes. It is used for forage
.
[source]
Habit: Graminoid
Habitat
Dry mountain slopes , rocky fissures , and along river banks; 200-1800 m [2].
Typically found at an altitude of 0 to 4,653 meters (0 to 15,266 feet).[3]
Biology
Reproduction
Duration: Annual
Taxonomy
- 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
(
)
- (Auct.) Cavalier-Smith, 1998
- Infraphylum:
Angiospermae
(
)
- Auct.
- Class:
Spermatopsida
(
)
- Brongniart, 1843
- Subclass:
Commelinidae
(
)
- Takhtajan, 1967
- Superorder:
Juncanae
(
)
- Takhtajan, 1967
- Order:
Poales
(
)
- Small, 1903
- Family:
Gramineae
(
)
- A.L. de Jussieu, 1789, nom. cons., nom. alt.
- Subfamily:
Aristidoideae
(
)
- Genus:
Aristida
(
)
- C. Linnaeus, 1753
- Threeawn
- Specific epithet:
adscensionis
- L.
- Botanical name: - Aristida adscensionis L.
- Specific epithet:
adscensionis
- L.
- Genus:
Aristida
(
- Subfamily:
Aristidoideae
(
- Family:
Gramineae
(
- Order:
Poales
(
- Superorder:
Juncanae
(
- Subclass:
Commelinidae
(
- Class:
Spermatopsida
(
- Infraphylum:
Angiospermae
(
- Subphylum:
Euphyllophytina
(
- Phylum:
Tracheophyta
(
- Subkingdom:
Viridaeplantae
(
- Kingdom:
Plantae
(
Synonyms
A. vulgaris Trinius & Ruprecht • A. vulpioides Hance • Aristida adscensionis var. abortiva Beetle • Aristida adscensionis var. modesta Hack. • Aristida adscensionis var. vulpioides (Hance) Hackel Ex Henrard • Aristida fasciculata Torr. • Chaetaria adscensionis (Linnaeus) P. Beauvois.
Notes
Name
Status: Accepted Name
.
Last scrutiny: 17-Oct-2001
Similar Species
Members of the genus Aristida
ZipcodeZoo has pages for 65 species, subspecies, varieties, forms, and cultivars in this genus:
A. adscensionis (Six-Weeks Three-Awn Grass) · A. adscensionis var. adscensionis (Sixweeks Threeawn) · A. arizonica (Arizona Three-Awn Grass) · A. basiramea (Forked Three-Awn) · A. beyrichiana (Beyrich Threeawn) · A. californica (California Three-Awn Grass) · A. californica var. californica (California Threeawn) · A. californica var. glabrata (Santa Rita Threeawn) · A. chaseae (Chase's Threeawn) · A. cognata (Spreading Threeawn) · A. condensata (Big Three-Awned Grass) · A. desmantha (Curly Threeawn) · A. dichotoma (Churchmouse Threeawn) · A. dichotoma var. curtissii (Curtis' Threeawn) · A. dichotoma var. dichotoma (Churchmouse Threeawn) · A. divaricata (Poverty Threeawn) · A. floridana (Key West Threeawn) · A. gypsophila (Gypsum Threeawn) · A. gyrans (Corkscrew Three-Awn Grass) · A. havardii (Harvard Threeawn) · A. lanosa (Woolly Three-Awn) · A. longespica (Slim-Spike Three-Awn Grass) · A. longespica geniculata (Spiked Needlegrass) · A. longespica longespica (Kearney´s Three-Awn) · A. longespica var. geniculata (Slimspike Threeawn) · A. longispica (Slimspike Threeawn) · A. longispica var. geniculata (Slimspike Threeawn) · A. longispica var. longispica (Slimspike Threeawn) · A. mohrii (Mohr's Three-Awn Grass) · A. oligantha (Oldfield Threeawn) · A. orcuttiana var. orcuttiana (Single Threeawn) · A. palustris (Longleaf Three-Awn) · A. pansa (Wooton Threeawn) · A. pansa var. pansa (Wooton's Threeawn) · A. patula (Tall Three-Awn Grass) · A. portoricensis (Pelos Del Diablo) · A. purpurascens (Arrowfeather Threeawn) · A. purpurascens var. purpurascens (Arrowfeather Threeawn) · A. purpurascens var. tenuispica (Arrowfeather Threeawn) · A. purpurascens var. virgata (Arrowfeather Threeawn) · A. purpurea (Democrat Grass) · A. purpurea var. fendleriana (Fendlers Threeawn) · A. purpurea var. longiseta (Fendlers Threeawn) · A. purpurea var. micrantha (Red Three-Awn) · A. purpurea var. nealleyi (Blue Threeawn) · A. purpurea var. parishii (Parish Threeawn) · A. purpurea var. perplexa (Purple Threeawn) · A. purpurea var. purpurea (Purple Threeawn) · A. purpurea var. wrightii (Wrights Threeawn) · A. ramosissima (Branched Three-Awn Grass) · A. ramosissima var. ramosissima (S-Curve Threeawn) · A. refracta (Islandthicket Threeawn) · A. rhizomophora (Florida Three-Awn Grass) · A. schiedeana (Single Threeawn) · A. schiedeana var. orcuttiana (Orcutt's Threeawn) · A. simpliciflora (Southern Three-Awned Grass) · A. spiciformis (Bottlebrush Threeawn) · A. stricta (Pineland Three-Awn Grass) · A. stricta var. beyrichiana (Wiregrass) · A. suringarii (St. Eustatius Threeawn) · A. swartziana (Swartz's Threeawn) · A. ternipes (Spider Three-Awn Grass) · A. ternipes var. gentilis (Mesa Threeawn) · A. ternipes var. ternipes (Spidergrass) · A. tuberculosa (Seabeach Needlegrass)
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Further Reading
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Notes
Contributors
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 10, 2012.
Data Sources
Accessed through GBIF Data Portal November 15, 2007:
- Australian National Herbarium
- , Australian National Herbarium
- Berkeley Natural History Museums, University and Jepson Herbaria DiGIR provider
- Herbarium Hamburgense, Impetus - Herbarium Hamburgense
- Herbarium of the University of Aarhus, The AAU Herbarium Database
- International Plant Genetic Resources Institute(IPGRI), The System-wide Information Network for Genetic Resources
- Israel Nature and Parks Authority, Israel Nature and Parks Authority
- Missouri Botanical Garden, Missouri Botanical Garden
- National Herbarium of New South Wales, Plants of Papua New Guinea
- School of Life Sciences, Arizona State University, Arizona State University Vascular Plant Herbarium
- School of Life Sciences, Arizona State University, The Deaver Herbarium, Northern Arizona University
- USDA PLANTS, USDA PLANTS Database
- Utah State University, USU-UTC Specimen Database
Identifiers
- Biodiversity Heritage Library NamebankID: 2661431
- Catalogue of Life Accepted Name Code: ITS-185298
- Global Biodiversity Information Facility Taxonkey: 14101746
- Globally Unique Identifier: urn:lsid:ipni.org:names:1003540-2
- GRIN Nomen Number: 4028
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 41401
- MoBot NameID: 25507157
- Natural Heritage Network Species Identifier: PMPOA0K010
- U.S.D.A. Plant Symbol: ARFA4
- Zipcode Zoo Species Identifier: 22324
Footnotes
- Sheng-lian Lu, Shou-liang Chen & Sylvia M. Phillips "Aristida". in Flora of China Vol. 22 Page 453. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
- "Aristida adscensionis". in Flora of China Vol. 22 Page 453, 454. Missouri Botanical Garden Press. Online at EFloras.org. [back]
- Mean = 1,309.230 meters (4,295.374 feet), Standard Deviation = 1,291.760 based on 553 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
