THIS PAGE IS NO LONGER UPDATED AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
Up-to-date information about California vascular plants is available from the Jepson eFlora.
Names are linked to treatments from the Manual
Key to ARCTIUM
N.B.: couplets are linked, e.g., 1. is linked to 1'.
1. Heads generally 25–40 mm diam, generally long-peduncled in ± flat-topped clusters; inner phyllaries generally green, margins minutely hairy; pappus 2–6 mm
1' Heads generally 10–25 mm diam, sessile to short-peduncled in raceme-like clusters; inner phyllaries generally purple-tinged, margins minutely serrate; pappus ± 2 mm