Overview
Senecioneae is the largest tribe of the Asteraceae, or the sunflower family, comprising approximately 150 genera and 3,000 species. Almost one-third of the species in this tribe are placed in the genus Senecio.1] Its members exhibit probably the widest possible range of form to be found anywhere in the entire plant kingdom and include annuals, minute creeping alpines, perennial herbs, shrubs, climbers, succulents, trees and semi-aquatic plants.[2]
Plants in this tribe are responsible for more livestock poisonings than all other plants combined.[3] The poisons are particularly pyrrolizidine alkaloids in Senecio[3] and in Tetradymia.[2]
A number of species are well known in horticulture.[2]
Classification
Since the time days of Bentham, the "premier systematic botanist of the nineteenth century"[4] considerable efforts have been made to classify and understand the striking morphological diversity in Senecioneae.[1] The traditional view of the tribe has been that of one huge genus Senecio plus many other genera which exhibit varying degrees of distinctiveness.[4] Circumscription and delimitation of the tribe has experienced expa nsions and contractions over the decades as genera and groups of genera have been moved in and out,[2] as was the case for Arnica, Liabum, Munnozia, Schistocarpha, etc. which have since then been excluded.[4] Of the several potential causes for this constant redefinition the greatest is probably that little is known about its intergeneric relationships or a lack of phylogenetic understanding enhanced by the other problems of conflicting clues from morphological characters, the large size of the tribe, the absence of a precise delimitation or circumscription of Senecio[1] and the naturalness of these assemblages combined with the imprecise boundaries of the different species themselves.[4]
Many segregate genera have been recognized in recent studies, often with circumscriptions derived from selected representative species. It is yet unclear that the recognition of numerous segregate genera provides a better taxonomy than treating the variation patterns as infrageneric taxa. A respectable case can be made for maintaining Senecio as a broad concept, at least until revisionary studies at the species level are carried out and the results subjected to critical analyses.[4] Most genera that have been removed from Senecioneae in its broadest sense have come to rest within Liabeae or within a broadly circumscribed Heliantheae (e.g., allies in Arnicinae, Chaenactidinae, or Madiinae; Haplo?sthes in Flaveriinae; Raillardella and allies in Madiinae). Additional information may be found in B. G. Baldwin et al. (2002), H. R obinson (1981), B. Nordenstam (1977?1978) and K. Bremer (1994).[2]
Genera
Selection of genera compiled from several lists:[2][5]
- Abrotanella
- Acrisione
- Adenostyles
- Aequatorium
- Alciope
- Antillanthus
- Arnoglossum
- Barkleyanthus
- Bedfordia
- Bethencourtia
- Blennosperma
- Brachyglottis
- Cadiscus
- Cacaliopsis
- Caucasalia
- Caxamarca
- Chersodoma< /i>
- Cineraria
- Cissampelopsis
- Crassocephalum
- Crocidium
- Cremanthodium
- Delairea
- Dendrophorbium
- Dicerococlados
- Dolichorrhiza
- Dolichoglottis
- Dorobaea
- Doronicum
- Elekmania
- Emilia
- Erechtites
- Euryops
- Farfugium
- Gymnodiscus
- Gynura
- Gynoxys
- Haastia
- Hasteola
- Hertia
- Homogyne
- Iranecio
- Jacobaea
- Jessea
- Kleinia
- Lachanodes
- Lamprocephalus
- Lasiocephalus
- Lepidospartum
- Ligularia
- Ligulariopsis
- Lopholaena
- Luina
- Mikaniopsis
- Misbrookia
- Nemosenecio
- Olig othrix
- Oresbia
- Othonna
- Packera
- Paracalia
- Parasenecio
- Pericallis
- Petasites
- Phaneroglossa
- Pittocaulon
- Pladaroxylon
- Pojarkovia
- Psacalium
- Pseudogynoxys
- Rainiera
- Roldana
- Rugelia
- Senecio
- Sinacalia
- Sinosenecio
- Solanecio
- Steirodiscus
- Stilpnogyne
- Syneilesis
- Synotis
- Talamancalia
- Tephroseris
- Tetradymia
- Traversia
- Tussilago
- Werneria
- Xenophyllum
- Yermo
Genera
Selection of genera compiled from several lists:[2][5]
- Abrotanella
- Acrisione
- Adenostyles
- Aequatorium
- Alciope
- Antillanthus
- Arnoglossum
- Barkleyanthus
- Bedfordia
- Bethencourtia
- Blennosperma
- Brachyglottis
- Cadiscus
- Cacaliopsis
- Caucasalia
- Caxamarca
- Chersodoma
- Cineraria
- Cissampelopsis
- Crassocephalum
- Crocidium
- Cremanthodium
- Delairea
- Dendrophorbium
- Dicerococlados
- Dolichorrhiza
- Dolichoglottis
- Dorobaea
- Doronicum
- Elekmania
- Emilia
- Erechtites
- Euryops
- Farfugium
- Gymnodiscus
- Gynura
- Gynoxys
- Haastia
- Hasteola
- Hertia
- Homogyne
- Ira necio
- Jacobaea
- Jessea
- Kleinia
- Lachanodes
- Lamprocephalus
- Lasiocephalus
- Lepidospartum
- Ligularia
- Ligulariopsis
- Lopholaena
- Luina
- Mikaniopsis
- Misbrookia
- Nemosenecio
- Oligothrix
- Oresbia
- Othonna
- Packera
- Paracalia
- Parasenecio
- Pericallis
- Petasites
- Phaneroglossa
- Pittocaulon
- Pladaroxylon
- Pojarkovia
- Psacalium
- Pseudogynoxys
- Rainiera
- Roldana
- Rugelia
- Senecio
- Sinacalia
- Sinosenecio
- Solanecio
- Steirodiscus
- Stilpnogyne
- Syneilesis
- Synotis
- Tal amancalia
- Tephroseris
- Tetradymia
- Traversia
- Tussilago
- Werneria
- Xenophyllum
- Yermo
References
- ^ a b c Pelser, Pieter B; Nordenstam, Bertil; Kadereit, Joachim W.; Watson, Linda E. (November 2007). "An ITS phylogeny of tribe Senecioneae (Asteraceae) and a new delimitation of Senecio L.". Taxon (International Association for Plant Taxonomy (IAPT)) 56 (4): 1077?14E(?1062). doi:10.2307/25065905.
- ^ a sup> b c d e f Flora of North America. "Senecioneae". Family List 20: 540. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=20544. Retrieved 2008-04-14.
- ^ a b Pieter B. Pelser, Barbara Gravendeel and Ruud van der Meijden (2002). "Tackling speciose genera: species composition and phylogeneti c position of Senecio sect. Jacobaea (Asteraceae) based onplastid and nrDNA sequences". American Journal of Botany 89 (6): 929?939. doi:10.3732/ajb.89.6.929. PMID 21665692. http://www.amjbot.org/cgi/content/full/89/6/929.
- ^ a b c d e Barkley, T. M. (February 1985). "Generic Boundaries in the Senecioneae". Taxon (International Association for Plant Taxonomy (IAPT)) 34 (1): 17?21. doi:10.2307/1221558. JSTOR 1221558.
- ^ Botanic Garden and Botanical Museum Berlin-Dahlem. "Details for: Senecioneae". Euro+Med PlantBase. Freie Universit?t Berlin. http://ww2.bgbm.org/EuroPlusMed/PTaxonDetail.asp?NameId=131779&PTRefFk=7000000. Retrieved 2008-04-14.
External links
Media related to Senecioneae at Wikimedia Commons
Data related to Senecioneae at Wikispecies
Taxonomy
The Tribe Senecioneae is a member of the Subfamily Asteroideae. Here is the complete "parentage" of Senecioneae:
- Domain: Eukaryota
Whittaker & Margulis,1978 - eukaryotes
- Kingdom: Plantae
Haeckel, 1866 - Plants
- Subkingdom: Viridaeplantae
Cavalier-Smith, 1981 - Green Plants
- Phylum: Tracheophyta
Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
- Subphylum: Euphyllophytina
- Class: Magnoliopsida
Brongniart, 1843 - Dicotyledons
- Subclass: Asteridae
Takhtajan, 1967
- Superorder: Campanulanae
Takhtajan Ex Reveal, 1992
- Order: Asterales
Lindley, 1833
- Family: Compositae
Giseke, 1792, nom. cons., nom. alt.
- Subfamily: Asteroideae
- Tribe: Senecioneae
- Subfamily: Asteroideae
- Family: Compositae
Giseke, 1792, nom. cons., nom. alt.
- Order: Asterales
Lindley, 1833
- Superorder: Campanulanae
Takhtajan Ex Reveal, 1992
- Subclass: Asteridae
Takhtajan, 1967
- Class: Magnoliopsida
Brongniart, 1843 - Dicotyledons
- Subphylum: Euphyllophytina
- Phylum: Tracheophyta
Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
- Subkingdom: Viridaeplantae
Cavalier-Smith, 1981 - Green Plants
- Kingdom: Plantae
Haeckel, 1866 - Plants
The Tribe Senecioneae is further organized into finer groupings including:
- Subtribe (3): Blennospermatinae · Senecioninae · Tussilagininae
- Genus (60): Abrotanella · Adenostyles · Arnoglossum · Brachyglottis · Brachyloma · Cacalia · Chionohebe · Chionoscilla · Chondropetalum · Chrysanthemopsis · Cineraria · Conophthorus · Crassocephalum · Cremanthodium · Dendrocacalia · Dendrophorbium · Doronicum · Doryopteris · Dracaena · Emilia · Euryops · Farfugium · Gynoxys · Gynura · Kleinia · Ligularia · Lopholaena · Lordhowea · Lysionotus · Monticalia · Morisia · Othonna · Packera · Paragynoxys · Parasenecio · Pentacalia · Petasites · Ponerorchis · Psacalium · Psylliostachys · Pyrethropsis · Robinsonia · Roldana · Senecio · Sequoia · Sequoiadendron · Serapias · Seticereus · Shortia · Shoshonea · Sinosenecio · Swertia · Synotis · Telesonix · Tephroseris · Tetradymia · Trichodiadema · Tussilago · Wagenitzia · Werneria
- Species: ZipcodeZoo has pages for 6,595 species, subspecies, varieties, forms, and cultivars in the Tribe Senecioneae.
Genera
Abrotanella
Abrotanella is a genus in the family Asteraceae, of about 20 species, native to New Guinea, Australia, New Zealand and temperate South America. [more]
Adenostyles
Adenostyles, is a large genus of to a flowering plants in the sunflower family Asteraceae, and of the constantly changing tribe Senecioneae. Adenostyles occur in the temperate climates of the northern hemisphere, mainly in Europe and Asia minor. [more]
Arnoglossum
Arnoglossum or by its common name Indian plantain is a genus of the family Asteraceae and the tribe Senecioneae whose genera have been misapplied and renamed. In the case of Arnoglossum, the genus name Cacalia has been misapplied. The name Arnoglossum is from the Greek word "arnos" meaning lamb, and "glossum" meaning tongue and is the ancient name for some species of Plantago. [more]
Brachyglottis
Brachyglottis is a genus of flowering plant in the Asteraceae family; a genus which has existed since November 29, 1775 when Johann Reinhold Forster & Georg Forster created the genus with this name from the Greek words brachus meaning short and glottis meaning "the vocal apparatus of the larynx" or tongue referring to the size of the ray florets. [more]
Brachyloma
Cacalia
The genus Cacalia L. is a nomen rejiciendum (rejected name) under the International Code of Botanical Nomenclature. Its species now reside in a few different genera. [more]
Chionohebe
Chionoscilla
Chondropetalum
Chrysanthemopsis
Cineraria
Cineraria is now generally treated as a genus of about 50 species of flowering plants in the family Asteraceae, native to southern Africa. The genus includes herbaceous plants and small subshrubs. [more]
Conophthorus
Crassocephalum
Crassocephalum is a genus the common names of whose members include ragleaf, thickhead, and bologi. Several species are raised as leaf vegetables and used for medicine, especially in West Africa. [more]
Cremanthodium
Dendrocacalia
Dendrophorbium
Dendrophorbium is a genus of in the Asteraceae family. It contains the following species: [more]
Doronicum
Doronicum is a genus of the botanical family Asteraceae. [more]
Doryopteris
Dracaena
Dracaena can mean: [more]
Emilia
Emilia may refer to any of the following: [more]
Euryops
Euryops is a genus of in the Asteraceae family. It contains the following species: [more]
Farfugium
Gynoxys
Gynoxys is a genus of in the Asteraceae family. It contains the following species: [more]
Gynura
Gynura is an Asian genus of the botanical family Asteraceae. [1], subfamily Asteroideae, tribe Senecioneae. The most known species is Gynura aurantiaca, so called because of the color of its orange inflorescences. This plant is also commonly know as "Purple Passion" because of the velvety purple leaves. Other species are [more]
Kleinia
Kleinia is a genus of flowering plant in the Asteraceae family. It contains the following species: [more]
Ligularia
Perennials, 15-150+ cm (glabrous or scattered-hairy, especially distally [arachno-tomentose]; roots fibrous). Stems usually 1, erect. Leaves basal and cauline; alternate; petiolate (petiole bases dilated, ± sheathing stems) ; blades (basal and proximal largest, cauline smaller distally) palmately [palmati-pinnately] nerved, orbiculate to reniform [elliptic, lanceolate, oblanceolate, ovate], margins dentate [denticulate, serrate, dissected], faces glabrous or sparsely pilosulous (mostly on nerves) [glaucous; arachno-tomentose]. Heads radiate [discoid], in corymbiform [racemiform or spiciform] arrays. Calyculi 0 [1-2+ bractlets]. Involucres cylindric to campanulate, [3-]16-28 mm diam. Phyllaries persistent, [5-]8-13+ in 1-2 series, erect, distinct (margins interlocking) [connate at bases], mostly oblong or lanceolate to linear, subequal, margins usually ± scarious (tips greenish or reddish, not blackened). Receptacles flat to convex, smooth, epaleate. Ray florets [0 or 1-7] 8-14+, pistillate, fertile; corollas (laminae prominent, showy) orange to orange-yellow or brick-red [yellow]. Disc florets [5-]12-100+, bisexual, fertile; corollas orange-yellow to orange, becoming brownish [yellow], tubes longer than cylindric throats, lobes 5, recurved, lance-linear; style branches: stigmatic areas continuous, apices truncate or rounded-truncate. Cypselae (stramineous to brownish) ± ellipsoid [cylindric or fusiform], 5[-10]-ribbed or -nerved, glabrous; pappi persistent (fragile), of 40-100+, reddish [sordid, brownish, purplish], barbellate to barbellulate bristles ([shorter than] longer than cypselae). x = 30.[1] [more]
Lopholaena
Lopholaena is a genus of plants in the family . About 20 species occur in Africa. [more]
Lordhowea
Lysionotus
Evergreen subshrubs or climbing lianas, epiphytic, less frequently epipetric or terrestrial, not rhizomatous. Stems branched or simple. Leaves usually many, along stem, opposite or whorled, rarely alternate, equal to subequal in a pair; leaf blade glabrous, sometimes puberulent to pilose, base cuneate to subcordate or attenuate. Inflorescences lax, axillary, 1- to many-flowered cymes; bracts 2, opposite. Calyx actinomorphic, 5-sect from base or 5-lobed; segments equal. Corolla purple to reddish, white, or yellow, zygomorphic, inside glabrous, sometimes sparsely puberulent or sparsely glandular puberulent; tube funnelform to tubular, not swollen, longer than limb, 0.3-1.5 cm in diam.; limb 2-lipped; adaxial lip 2-lobed, shorter than abaxial lip; abaxial lip 3-lobed, lobes equal or central lobe longer, apex rounded. Stamens 2, adnate to abaxial side of corolla tube near middle, seldom to near base, included; anthers basifixed, coherent, thecae nearly parallel, not confluent, dehiscing longitudinally; connective sometimes appendiculate; staminodes 2 or 3, adnate to adaxial side of corolla tube. Disc ringlike to cupular. Ovary linear, 1-loculed; placentas 2, parietal, projecting inward, 2-cleft. Stigma 1, terminal, depressed globose, undivided. Capsule straight in relation to pedicel, linear, much surpassing calyx, dehiscing loculicidally to base; valves 2 or 4, straight, not twisted. Seeds with 1 hairlike or subulate appendage at each end.[2] [more]
Monticalia
Monticalia is a genus of in the Asteraceae family. It contains the following species: [more]
Morisia
Othonna
Othonna is a genus of evergreen or deciduous geophytes, dwarf succulents or shrubs belonging to the sunflower family Asteraceae. The genus includes more than 100 species concentrated in the Western Cape of South Africa and southern Namibia. A few species occur in summer rainfall parts of southern Africa. The genus is closely allied to Senecio and can be distinguished principally by details of the involucre. Taxonomically they are in need of a modern revision. [more]
Packera
Packera is a genus of about 64 species of plants in the composite family, Asteraceae. Its members were previously included in the genus Senecio (where they were called aureoid senecios by Asa Gray), but were divided out based on chromosome numbers, a variety of morphological characters, and molecular phylogeny. [more]
Paragynoxys
Paragynoxys is a genus of nine of flowering plants in the Asteraceae family. It contains the following species: [more]
Parasenecio
Perennials, [20-]60-120[-200] cm (rhizomes fibrous-rooted; plants caulescent [subscapiform], glabrous or hairy). Stems usually 1, erect. Leaves basal and cauline; alternate; petiolate (petiole bases ± auriculate and clasping to sheathing; proximal and middle leaves largest) ; blades palmately nerved [and lobed], reniform to ± deltate [orbiculate, sometimes peltate], margins usually raggedly dentate, abaxial faces glabrous or puberulent (on veins) [puberulent to sericeous], adaxial glabrous. Heads discoid (nodding), in racemiform or subpaniculiform arrays. Calyculi 0 [present]. Involucres cylindric to weakly turbinate, 2-3+ mm diam. Phyllaries persistent, [3-]5+ in 1-2 series, erect, distinct, oblong to linear, equal, margins ± scarious. Receptacles flat, smooth or foveolate, epaleate. Ray florets 0. Disc florets [1-]4-7[-20], bisexual, fertile; corollas white or ochroleucous [yellowish], tubes longer than funnelform throats, lobes 5, recurved or coiled, lance-linear to deltate; style branches: stigmatic areas continuous, apices rounded-truncate. Cypselae ± ellipsoid, sometimes finely 10-ribbed, glabrous; pappi readily falling or fragile, of 100-120+, white [reddish], barbellulate bristles. x = 30.[3] [more]
Pentacalia
Pentacalia is a genus of flowering plant in the Asteraceae family. About 34 members of this genus appear to be located in the South American county Ecuador, where they are threatened by habitat loss. The genus contains approximately two hundred species, which are distributed from Mexico to northern South America. [more]
Petasites
The plants commonly referred to as Butterbur are found in the daisy family Asteraceae in the genus Petasites. They are mostly quite robust plants with thick, creeping underground rhizomes and large Rhubarb-like leaves during the growing season. Another common name for many species of this genus is Sweet Coltsfoot. [more]
Ponerorchis
Psacalium
Perennials, [10-]80-150[-300] cm (rhizomes usually fleshy; plants hairy or tufted-hairy to unevenly glabrate). Stems single or clustered, erect. Leaves basal and cauline (proximal largest, cauline progressively smaller distally, bractlike) ; alternate; petiolate (petioles well defined, attached to blades at bases [attached near centers, leaves peltate]) ; blades palmately or pinnately nerved (and, usually, lobed), mostly ovate to elliptic [orbiculate, polygonal], ultimate margins entire or toothed, faces glabrous or sparsely [densely] hairy. Heads discoid, in corymbiform to paniculiform arrays. Calyculi of 1-3[-5] bractlets (shorter than [equaling or longer than] phyllaries). Involucres cylindric to weakly turbinate, 1.5-4[-10+] mm diam. Phyllaries persistent, mostly 5-8[-17] in 1-2 series, erect, distinct, ovate, obovate, or oblong, subequal, margins scarious (tips greenish or gray to whitish, not black). Receptacles flat, foveolate (sometimes hairy), epaleate. Ray florets 0. Disc florets 5-8[-80], bisexual, fertile; corollas white or ochroleucous [yellow, purplish], tubes longer than the campanulate or ± lacking throats, lobes 5, ascending to spreading, lance-linear; style branches: stigmatic areas continuous, apices rounded-truncate. Cypselae mostly ± ellipsoid, ± compressed, [10-]14-18-ribbed, glabrous or hairy; pappi [0] persistent (fragile), of 100-120, white or creamy, barbellulate bristles. x = 30.[4] [more]
Psylliostachys
Pyrethropsis
Robinsonia
Roldana
Perennials or subshrubs [shrubs, or trees], [20-]60-100(-300) [-800] cm (caudices woody, fibrous-rooted, often woolly). Stems single or clustered, erect (glabrous or arachnose and glabrescent [tomentose to lanate]). Leaves mostly cauline (at flowering) ; alternate; petiolate; blades pinnati-palmately [pinnately or palmately] nerved, suborbiculate (proximal) to ovate or oblong (distal) [deltate, elliptic, lanceolate, orbiculate, or ovate], sinuately to angularly lobed (± polygonal) [palmately, pinnately, or not lobed], ultimate margins serrate to denticulate (lobes and denticles apiculate) or entire, abaxial faces glabrous or arachnose [tomentose to lanate] and glabrate, adaxial glabrous or glabrate [tomentose to lanate]. Heads radiate [disciform or discoid], in corymbiform or paniculiform arrays (peduncles usually arachnose). Calyculi 0 or of 1-3(-5) [-13+] (linear [filiform to foliaceous]) bractlets. Involucres campanulate [hemispheric to cylindric or funnelform], 3-5[-20+] mm diam. Phyllaries persistent, (5-) 8-13+ in 2 series, erect, distinct, lanceolate or lance-linear to linear (± navicular), equal, margins ± scarious. Receptacles flat, alveolate (margins of sockets raggedly toothed), epaleate. Ray florets [0 or 3-]5-8, pistillate, fertile; corollas yellow or yellow-orange [whitish or ochroleucous] (laminae usually oblong to elliptic). Disc florets 6-30[-100+], bisexual, fertile; corollas yellow or yellow-orange [whitish or ochroleucous], tubes shorter to longer than funnelform to campanulate throats, lobes 5, recurved, deltate to lance-ovate; style branches: stigmatic areas continuous, apices rounded-truncate. Cypselae ± columnar, [5- or] 10-ribbed, puberulent (between ribs) [glabrous]; pappi persistent (fragile), of 40-80+, white, barbellulate bristles in 1 series. x = 30.[5] [more]
Senecio
Senecio () is a genus of the daisy family (Asteraceae) that includes ragworts and groundsels. The flower heads are normally rayed, completely yellow, and the heads are borne in branched clusters. Senecio is one of the largest genera of flowering plants, and despite the separation of many species into other genera it still contains c.?1250 species of varied form, including leaf, stem and tuber succulents, annuals, perennials, aquatics, climbers, shrubs and small trees. Some species produce natural biocides (especially alkaloids) to deter or even kill animals that would eat them. [more]
Sequoia
Sequoia is a genus in the cypress family Cupressaceae (formerly treated in Taxodiaceae), containing the single living species Sequoia sempervirens. Common names include Coast Redwood and California Redwood (it is one of three species of trees known as redwoods). It is an evergreen, long-lived, monoecious tree living for up to 2,200 years, and is the tallest tree in the world, reaching up to 115.5 m (379.1 ft) in height and 7 m (23 ft) diameter at the base. It is thought to be named after the Cherokee Indian leader, Sequoyah, though this is uncertain. [more]
Sequoiadendron
Sequoiadendron giganteum (giant sequoia, giant redwood, Sierra redwood, Sierran redwood, or Wellingtonia) is the sole living species in the genus Sequoiadendron, and one of three species of coniferous trees known as redwoods, classified in the family Cupressaceae in the subfamily Sequoioideae, together with Sequoia sempervirens (coast redwood) and Metasequoia glyptostroboides (dawn redwood). The common use of the name "sequoia" generally refers to Sequoiadendron, which occurs naturally only in groves on the western slopes of the Sierra Nevada Mountains of California. [more]
Serapias
Seticereus
Cleistocactus is a genus of columnar cacti from Peru, Uruguay, Bolivia and Argentina. The name comes from the Greek kleistos meaning closed because the flowers hardly open. [more]
Shortia
Shoshonea
Sinosenecio
Perennials, 10-30 cm (glabrous or sparsely tomentose; caudices sometimes rhizomatous, sometimes fibrous-rooted). Stems single or loosely clustered, erect. Leaves basal and cauline (sometimes mostly basal, distal usually smaller, bractlike) ; alternate; petiolate (petioles sometimes proximally dilated, ± sheathing stems, distally not winged) ; blades palmately or subpalmately nerved, ovate to subreniform [orbiculate to deltate], margins lobulate-dentate [dentate, denticulate, entire], faces glabrous or sparsely arachnose to tomentose. Heads radiate, borne singly [in corymbiform to paniculiform arrays]. Calyculi 0 (cauline bractlets sometimes approaching bases of heads). Involucres campanulate to hemispheric, [3-]6-10+ mm diam. Phyllaries persistent, usually 8 or 13 in (1-) 2 series, erect (reflexed in fruit), distinct [basally connate], ± lanceolate, equal, margins ± scarious. Receptacles flat to convex, smooth [foveolate, sometimes setaceous], epaleate. Ray florets 8-13, pistillate, fertile; corollas yellow to orange-yellow (sometimes drying pink). Disc florets [20-]30-60+, bisexual, fertile; corollas yellow to orange-yellow, tubes shorter than or equaling funnelform [campanulate] throats, lobes 5, erect or recurved, lance-deltate; style branches: stigmatic areas continuous [in 2 lines], apices rounded-truncate. Cypselae ± columnar to prismatic, 5- or 10-ribbed or -nerved, glabrous [puberulent]; pappi persistent (fragile [readily falling]), of 40-60, white, barbellulate to smooth bristles [absent on ray cypselae]. x = 24.[6] [more]
Swertia
Swertia is a genus in the gentian family containing plants sometimes referred to as the felworts. Some species bear very showy purple and blue flowers. [more]
Synotis
Telesonix
Tephroseris
Annuals, biennials, or perennials, (5-) 10-100+ cm (rhizomatous or caudices ± erect; plants usually arachnose, floccose, lanate, tomentose, or villous, sometimes unevenly glabrate). Stems 1 or more (loosely clustered), erect. Leaves basal and cauline; alternate; petiolate (basal and proximal cauline; distal leaves usually sessile, smaller, bractlike) ; blades pinnately nerved, lanceolate, linear-oblanceolate, oblanceolate, ovate, or subrhombic (bases tapering or contracted to petioles), margins entire or dentate, denticulate, subentire, subpinnatifid, or wavy, faces usually arachnose, floccose, lanate, tomentose, or villous, sometimes unevenly glabrate. Heads radiate or discoid, borne singly or (2-40+) in corymbiform arrays. Calyculi 0. Involucres hemispheric or campanulate to turbinate, 8-12+ mm diam. Phyllaries persistent, usually 8, 13, or 21 in (1-) 2 series, erect, distinct (margins interlocking), lance-linear to lanceolate or oblong, equal, margins ± scarious (abaxial faces usually arachnose, floccose, lanate, tomentose, or villous, sometimes unevenly glabrate). Receptacles flat or ± dome-shaped (not conic), smooth, epaleate. Ray florets 0 or mostly 8, 13, or 21, pistillate, fertile; corollas usually yellow, orange, or orange-yellow, sometimes ochroleucous or white [brick-colored, purplish] (laminae usually 5-20 mm, sometimes 1-3 mm). Disc florets 30-80+, bisexual, fertile; corollas usually yellow, orange, or orange-yellow, sometimes ochroleucous or white [brick-colored, purplish], tubes longer than or equaling campanulate throats, lobes 5, erect or recurved, lance-linear (anther collars cylindric) ; style branches: stigmatic areas continuous, apices rounded-truncate. Cypselae ± cylindric, 10-ribbed or -nerved, glabrous or puberulent; pappi persistent, of 30-60+, white, whitish, or brownish, barbellulate bristles (equaling or slightly exceeding involucres, sometimes exceeding involucres to 10 mm in T. palustris). x = 24.[7] [more]
Tetradymia
Shrubs, mostly 30-200 cm. Stems 1-5+, erect to spreading (tomentose to pannose or glabrous, often spiny). Leaves (usually with fascicles of secondary leaves in axils of the primary; primaries sometimes becoming spines) cauline; alternate; sessile (or obscurely petiolate) ; blades obscurely palmately nerved (usually 1-nerved), linear to filiform, narrowly lanceolate, or oblanceolate, margins entire, faces glabrous or lanate to tomentose, sometimes glabrescent. Heads discoid, (1-3) in distil axils or (3-8) in corymbiform clusters. Calyculi 0. Involucres turbinate to cylindric or hemispheric, 3-10+ mm diam. Phyllaries persistent, 4-6 in 1-2 series, erect, distinct, mostly oblong to ovate or lanceolate, equal or subequal, margins obscurely scarious. Receptacles flat, foveolate, epaleate. Ray florets 0. Disc florets 4-9, bisexual, fertile; corollas cream to bright yellow, tubes longer than funnelform or abruptly dilated throats, lobes 5, recurved, linear to lanceolate; style branches stigmatic in 2 lines, apices usually truncate to rounded-truncate, sometimes truncate-penicillate (appendages essentially 0). Cypselae prismatic to obconic or fusiform, obscurely 5-ribbed, glabrous or hirsute to densely pilose (hairs often obscuring pappi) ; pappi 0 or of 70-150 bristles or of 20-30, white to stramineous, subulate to setiform scales. x = 30.[8] [more]
Trichodiadema
Tussilago
Tussilago is a genus of plants. T. farfara is the coltsfoot. Many of the species are often placed in other genera, such as Homogyne, Petasites or Adenostyles. [more]
Wagenitzia
Werneria
Werneria (Smalltongue Toads) is a genus of true toads endemic to Cameroon and Equatorial Guinea. [more]
At least 70 species and subspecies belong to the Genus Werneria.
More info about the Genus Werneria may be found here.
References
- ^ a b c Pelser, Pieter B; Nordenstam, Bertil; Kadereit, Joachim W.; Watson, Linda E. (November 2007). "An ITS phylogeny of tribe Senecioneae (Asteraceae) and a new delimitation of Senecio L.". Taxon (International Association for Plant Taxonomy (IAPT)) 56 (4): 1077?14E(?1062). doi:10.2307/25065905.
- ^ a b c d e f< /b> Flora of North America. "Senecioneae". Family List 20: 540. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=20544. Retrieved 2008-04-14.
- ^ a b Pieter B. Pelser, Barbara Gravendeel and Ruud van der Meijden (2002). "Tackling speciose genera: species composition and phylogenetic position of Senecio sect. Jacobaea (Asteraceae) based onplastid and nrDNA sequences". American Journal of Botany 89 (6): 929?939. doi:10.3732/ajb.89.6.929. PMID 21665692. http://www.amjbot.org/cgi/content/full/89/6/929.
- ^ a b c d e Barkley, T. M. (February 1985). "Generic Boundaries in the Senecioneae". Taxon (International Association for Plant Taxonomy (IAPT)) 34 (1): 17?21. doi:10.2307/1221558. JSTOR 1221558.
- ^ Botanic Garden and Botanical Museum Berlin-Dahlem. "Details for: Senecioneae". Euro+Med PlantBase. Freie Universit?t Berlin. http://ww2.bgbm.org/EuroPlusMed/PTaxonDetail.asp?NameId=131779&PTRefFk=7000000. Retrieved 2008-04-14.
Bibliography
- Cufodontis, G. 1933. Kritische Revision von Senecio Section Tephroseris. Feddes Repert. Spec. Nov. Regni Veg. 70: 1-266.
- Robinson, H. and R. D. Brettell. 1973b. Studies in the Senecioneae (Asteraceae). III. The genus Psacalium. Phytologia 27: 254-264.
- Strother, J. L. 1974. Taxonomy of Tetradymia (Compositae: Senecioneae). Brittonia 26: 177-202.
Footnotes
- Theodore M. Barkley "Ligularia". in Flora of North America Vol. 20 Page 540, 542, 613. Oxford University Press. Online at EFloras.org.
- "Lysionotus". in Flora of China Vol. 18 Page 385. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.
- Theodore M. Barkley "Parasenecio". in Flora of North America Vol. 20 Page 543, 611, 619, 620. Oxford University Press. Online at EFloras.org.
- Theodore M. Barkley "Psacalium". in Flora of North America Vol. 20 Page 543, 621. Oxford University Press. Online at EFloras.org.
- A. Michele Funston "Roldana". in Flora of North America Vol. 20 Page 542,620. Oxford University Press. Online at EFloras.org.
- John P. Janovec, Theodore M. Barkley "Sinosenecio". in Flora of North America Vol. 20 Page 542, 618, 619. Oxford University Press. Online at EFloras.org.
- Theodore M. Barkley , David F. Murray "Tephroseris". in Flora of North America Vol. 20 Page 541, 542, 543, 545, 548, 615. Oxford University Press. Online at EFloras.org.
- John L. Strother "Tetradymia". in Flora of North America Vol. 20 Page 540, 542, 629. Oxford University Press. Online at EFloras.org.
Sources
- The text on this page is licensed under the GNU Free Documentation License. It includes material from Wikipedia retrieved Wednesday, April 25, 2012.
- Photographs on this page are copyrighted by individual photographers, and individual copyrights apply.
- The technology underlying this page, including the controls behind Keep Exploring, is owned by the BayScience Foundation. All rights are reserved.
