Senecio jacobaea L.
Details
Nomenclature
L.
L.
1753
870
ICN
Senecio jacobaea L.
species
Senecio jacobaea
Classification
Vernacular names
Descriptions
Senecio jacobaea L.
Erect biennial or perennial herb, 30-120 cm tall. Stems densely lanate above but soon glabrous, usually branched only above, sometimes branched from base. Basal lvs lanate when young, usually becoming almost glabrous but often remaining hairy on veins of lower surface, rarely sparsely to moderately hairy on both surfaces, petiolate; petiole < lamina, amplexicaul; lamina lyrate-pinnatifid, obovate to ovate-oblong, obtuse to subacute at apex, (3)-5-20-(25) × (2)-4-6-(8) cm; segments ovate, oblong, or obovate, 1-2-pinnatisect; venation pinnate. Cauline lvs lyrate-pinnatifid to 1-pinnate; segments again 1-2-pinnatisect; uppermost lvs apetiolate, with narrow segments. Capitula usually numerous in dense, flat-topped corymbs, rarely fewer and more diffuse. Supplementary bracts 3-10, lanceolate, 1.5-3 mm long. Involucral bracts 11-14, ovate-oblong, 3-5 mm long, usually glabrous, sometimes with a few scattered hairs. Ray florets 11-13; ligules bright yellow, 5-12 mm long. Disc golden yellow. Achenes terete, 1.4-2.5 mm long, those of ray florets glabrous, those of disc florets moderately hairy; pappus 3.5-5 mm long, soon deciduous from ray achenes.
Taxonomic concepts
Senecio jacobaea L.
Senecio jacobaea L.
Collections
Metadata
dfc822c4-1d83-4c97-a12c-72f4f18285eb
scientific name
Names_Plants
1 January 2000
11 March 2009