Overview
Taxonomy
The Subtribe Hypochaeridinae is a member of the Tribe Lactuceae. Here is the complete "parentage" of Hypochaeridinae:
- 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: Cichorioideae
- Tribe: Lactuceae
- Subtribe: Hypochaeridinae
- Tribe: Lactuceae
- Subfamily: Cichorioideae
- 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 Subtribe Hypochaeridinae is further organized into finer groupings including:
- Genus (9): Helminthia · Helminthotheca · Helmintia · Hyoseris · Hypochaeris · Leontodon · Picris · Rhagadiolus · Urospermum
- Species: ZipcodeZoo has pages for 464 species, subspecies, varieties, forms, and cultivars in the Subtribe Hypochaeridinae.
Genera
Helminthia
Helminthotheca
The genus Helminthotheca is an genus, which belongs to the family Asteraceae. Its members are often treated as species of other genera:[] [more]
Helmintia
Hyoseris
Hypochaeris
Hypochaeris is a genus of plants in family Asteraceae. Species include: [more]
Leontodon
Hawkbits (Leontodon spp.) are dandelion-like flowers in the family Asteraceae (Compositae). Their English name derives from the mediæval belief that hawks ate the plant to improve their eyesight. Although originally native to Eurasia and North Africa, they have since become established in other countries, including the United States and New Zealand. [more]
Picris
Picris (oxtongues) is a genus in the family Asteraceae (or Compositae). [more]
Rhagadiolus
Annuals, 5-60+ cm; taprooted. Stems usually 1, erect, branched distally, glabrous. Leaves basal and cauline (mostly cauline at flowering) ; basal sessile or ± petiolate, distal ± sessile; blades ovate-lanceolate to lanceolate or linear (often runcinate), margins entire or dentate to pinnately lobed (faces glabrous or ± hispid). Heads in ± corymbiform arrays (terminal heads often surpassed by others). Peduncles not inflated, rarely bracteolate. Calyculi of 5, ovate to deltate bractlets. Involucres campanulate to cylindric, 2-4+ mm diam. (larger in fruit). Phyllaries (3-) 5-8 in 1 series (closely enfolding ovaries/cypselae of subtended florets; ± patent in fruit), linear, equal, margins often scarious, apices acuminate (abaxially glabrous or ± hispid to scabrous). Receptacles ± flat, smooth or ± pitted, glabrous, epaleate. Florets 5-6(-10+) ; corollas yellow. Cypselae brownish, heteromorphic; outer (tardily falling with enfolding phyllary) ± terete, narrowed distally, straight to arcuate, not beaked, ribs 0, faces glabrous; inner (readily falling) terete, straight to ± coiled, faces glabrous or closely hirtellous; pappi 0. x = 5.[1] [more]
Urospermum
Annuals [perennials], 10-40(-60+) cm; taprooted. Stems usually 1, erect, branched distally, setose to hispid or glabrous [pilosulous]. Leaves mostly cauline (at flowering) [mostly basal]; proximal ± petiolate, distal sessile; blades of the proximal mostly obovate to oblong-obovate, usually pinnately lobed or dentate, distal ovate to linear (bases often clasping), ultimate margins dentate or entire (veins often setose on abaxial faces). Heads borne singly or in loose, corymbiform arrays. Peduncles little, if at all, inflated distally, rarely bracteate. Calyculi 0. Involucres ± urceolate, 10-20+ mm diam. Phyllaries 7-8(-12+) in 1(-2) series, ovate-lanceolate to lance-linear (basally connate), subequal, margins scarious, apices acuminate. Receptacles flat to convex, pitted, hispid, epaleate. Florets 20-50+; corollas yellow, sometimes striped abaxially with red. Cypselae brown, bodies flattened-oblong, ± tuberculate, faces glabrous or scabrellous, beaks proximally dilated and tuberculate, distally acuminate and scabrous to scabrellous; pappi readily falling, of 18-22+ white [buff to rufous], subequal, plumose bristles in 1(-2) series (basally connate, falling together). . = 5, 7?.[2] [more]
At least 13 species and subspecies belong to the Genus Urospermum.
More info about the Genus Urospermum may be found here.
Bibliography
- Lack, H. W. and B. E. Leuenberger. 1979. Pollen and taxonomy of Urospermum (Asteraceae, Lactuceae). Pollen & Spores 21: 415-425.
Footnotes
- John L. Strother "Rhagadiolus". in Flora of North America Vol. 19, 20 and 21 Page 214, 218, 300. Oxford University Press. Online at EFloras.org.
- John L. Strother "Urospermum". in Flora of North America Vol. 19, 20 and 21 Page 215, 296. Oxford University Press. Online at EFloras.org.
Sources
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