Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Sonchus

View taxon page for Sonchus

(For a list of species in Sonchus, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Perennial herb from long rhizomesfruit ± , 3–4-angled, 2-ribbed between angles ..... S. arvensis

2. Peduncles and phyllaries stalked-glandular ..... [subsp. arvensis]]

2' Peduncles and phyllaries generally sessile-glandular, rarely  ..... subsp. uliginosus

1' Annual from taproots; fruit weakly to strongly flattened

3. Stem slender; leaves deeply lobed,  toothed and often with smaller 2° lobes; fruit only slightly flattened, transversely roughened; corolla tube; uncommon ..... S. tenerrimus

3' Stem stout; leaves toothed or with wide lobes; fruit flat, with thin edges, smooth or cross-roughened; ligule <= corolla tube; widespread and common

4. Proximal (clasping) lobes of leaves rounded, strongly curved to coiled; fruit 3-ribbed per side, otherwise smooth; ligule < corolla tube ..... S. asper subsp. asper

4' Proximal (clasping) lobes of leaves ; fruit 2–4-ribbed and cross-wrinkled; ligule ± = corolla tube ..... S. oleraceus



Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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