Sonchus asper (L.) Hill
Show more
Details
Sonchus asper (L.) Hill, Herb. Brit. (Hill) 47 (1769)
Sonchus asper (L.) Hill
Nomenclature
(L.) Hill
L.
Hill
1769
47
ICN
species
Sonchus asper
Classification
Subordinates
Vernacular names
Synonyms
Descriptions
Sonchus asper (L.) Hill
Annual or biennial. Roots tap and fibrous. Stem erect, usually simple, finely grooved or ribbed, glabrous, (15)-20-60-(180) cm tall. Lvs firm-textured, ± shiny, usually green or rarely glaucous above, paler to ± glaucous beneath, glabrous, lanceolate to oblanceolate or obovate; margins sinuate-dentate with prickly-spinose teeth. Rosette and lower stem lvs tapering to expanded auriculate base, (4)-10-20-(40) × (1.5)-3-6-(15) cm, pinnatifid to c. 1/2 way to midrib or rarely not lobed; lobes recurved to spreading, triangular to lanceolate. Upper lvs pinnatifid or not lobed, narrowly triangular to subulate, with rounded amplexicaul auricles at base. Infl. cymose to umbellate; capitula few to many. Involucre 10-15 mm long, turbinate to cylindric; bracts imbricate, reflexed at fruiting, glabrous or rarely with tangled white short branching hairs and sparse long pale glandular hairs. Receptacle glabrous. Florets 11/2× length of involucre; corolla tube > ligule; ligules spreading, yellow. Achenes elliptic, pale brown, strongly flattened, 2.5-3 × 1-1.6 mm, 3-ribbed on each face, winged; spaces between ribs smooth; ribs and edges of wings smooth or finely scabrid. Pappus fine, white, c. = involucre.
Taxonomic concepts
Sonchus asper (L.) Hill
Sonchus asper (L.) Hill
Sonchus asper (L.) Hill
Sonchus oleraceus var. asper L.
Sonchus asper (L.) Hill
Sonchus oleraceus var. asper L.
Sonchus asper (L.) Hill
Collections
Metadata
9fbedf23-440e-4f93-86a2-7aea8f32805d
scientific name
Names_Plants
1 January 2000
14 June 2006