The largest family of flowering plants , the Compositae (Asteraceae), comprising about 1,100 genera and more than 20,000 species and characterized by many small flowers arranged in a head looking like a single flower and subtended by an involucre of bracts. A head may consist of both ray flowers and disk flowers, as in the sunflower, of disk flowers only, as in the burdock, or of ray flowers only, as in the dandelion.
The Senecioneae are a tribe of closely related genera that can be recognized most readily by the nature of the pappus and the involucral bracts or phyllaries. The phyllaries are basically in one well developed, often partially or wholly connate series of equal length that closely envelope the head . Frequently there are a few, very much smaller and mostly randomly distributed, often necrotic-tipped bracts near the base of the main series. The pappus is of fine, soft, often pure white capillary hairs . Heads may be either discoid or radiate . -- Gerald Carr.
, 5-30(-50) cm (rhizomes fibrous-rooted, creeping
forming extensive colonies). Stems usually 1, erect
, not branched). Leaves basal and cauline (basal usually developing after flowers) ; alternate; petiolate
1-2 times blades
) or sessile; blades (basal) palmately nerved, orbiculate to polygonal or lobed
(cauline leaves lance-ovate to linear
, bractlike or scale-like), margins
. Heads (erect at flowering, nodding
in fruit) radiate
, borne singly. Calyculi 0 (or indistinct, bractlets
intergrading with bractlike cauline leaves). Involucres cylindric
to subturbinate, 10-15 mm diam. (larger in fruit). Phyllaries persistent
, usually ± 21 in (1-) 2 series, erect, distinct
to linear, subequal
, margins scarious
(apices greenish or yellow-green). Receptacles convex
, foveolate (socket
margins ± membranous), epaleate. Ray florets 100-200(-300+), pistillate
; corollas yellow (drying pinkish). Disc florets (20-) 30-40, functionally staminate
; corollas yellowish, tubes
5, erect, linear; styles not divided
. Cypselae narrowly cylindric or ± prismatic
, 5(-10) -ribbed, glabrous
; pappi readily falling or fragile, of 60-100+, white, barbellulate
. x = 30.
Species 1: introduced ; temperate Eurasia , n Africa.
- Whittaker & Margulis,1978
- Haeckel, 1866
- Cavalier-Smith, 1981
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Brongniart, 1843
- Takhtajan, 1967
- Takhtajan Ex Reveal, 1992
- Lindley, 1833
- 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
- Kingdom: Plantae () - Haeckel, 1866 - Plants
Members of the genus Tussilago
ZipcodeZoo has pages for 1 species, subspecies, varieties, forms, and cultivars in this genus:
- Search for Pictures: images.google.com
- Search for Scholarly Articles: Google Scholar
- Search using Scientific Name and Vernacular Names: All the Web | AltaVista Canada | AltaVista | Excite | Google | HotBot | Lycos
- Search using Specialized Databases: GenBank | Medline | Scirus | CISTI/CAL | Agricola Periodicals | Agricola Books
- Morton, G. H. 1978. Tussilago. In: N. L. Britton et al., eds. 1905+. North American Flora.... 47+ vols. New York. Ser. 2, part 10, p. 174.
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 15, 2012.
- Biodiversity Heritage Library NamebankID: 10558264
- Global Biodiversity Information Facility Taxonkey: 15214387
- Globally Unique Identifier: urn:lsid:ipni.org:names:256949-1
- Zipcode Zoo Species Identifier: 3150038