Key to Arctium
View taxon page for Arctium
(For a list of species in Arctium, use the above link.)
Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.
1. Heads generally 25–40 mm diam, generally long-peduncled in ± rounded or flat-topped clusters; inner
phyllaries generally green,
margins minutely hairy;
pappus 2–6 mm
..... A. lappa 1' Heads generally 10–25 mm diam,
sessile 
Without a petiole, peduncle, pedicel, or other kind of stalk.
to short-peduncled in raceme- or panicle-like clusters; inner phyllaries generally purple-tinged, margins minutely
serrate 
Having margins with sharp, fine to coarse teeth generally pointing tipward, not outward; margins with such teeth on such primary teeth are doubly serrate.
; pappus ± 2 mm
..... A. minus
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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/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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