Sonchus oleraceus L.
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Sonchus oleraceus L., Sp. Pl. 794 (1753)
Sonchus oleraceus L.
Nomenclature
L.
L.
1753
794
ICN
Sonchus oleraceus L.
species
Sonchus oleraceus
Classification
Vernacular names
Descriptions
Sonchus oleraceus L.
Annual. Roots tap and fibrous. Stem erect, simple or branched, finely grooved or ribbed, glabrous, 50-120 cm tall. Lvs soft, dull to ± shiny, mid to dark green to glaucous above, pale to glaucous beneath, glabrous, ± oblanceolate to obovate; margins dentate with spinulose teeth. Rosette and lower stem lvs (4)-10-20 × (1.5)-4-10 cm, pinnatifid almost to midrib; lobes reflexed or recurved, ovate to narrowly triangular; petiole narrowly winged. Upper lvs pinnatifid, usually with broadly triangular terminal lobe, 1-3 pairs of narrowly triangular lateral lobes, a broadly expanded winged petiole, and an amplexicaul-auriculate base with pointed lobes, sometimes lf not lobed, ovate-amplexicaul, rarely pinnatisect with linear lobes. Infl. cymose to umbellate; capitula few to many. Involucre 10-15 mm long, turbinate to cylindric; bracts imbricate, reflexed at fruiting, usually glabrous or rarely with a few pale glandular or eglandular setae. Receptacle glabrous. Florets 11/2× length of involucre; corolla tube c. = ligule; ligules spreading, yellow. Achenes narrowly obovoid to clavate, brown, weakly flattened, 2.5-3 × 0.8-1 mm, 3-ribbed on each face, not winged; ribs and spaces between finely transversely wrinkled. Pappus fine, white, c. = involucre.
Taxonomic concepts
Collections
Metadata
e247f777-eef4-48ad-9f16-c7256583b376
scientific name
Names_Plants
1 January 2000
14 June 2006