|University of California, Berkeley|
Key to families | Table of families and genera
1. Heads radiate, generally solitary; involucre bell-shaped to hemispheric, 7–10 mm diam ..... A. shockleyi
1' Heads discoid, generally in rounded to flat-topped clusters; involucre hemispheric to spheric, 8–16 mm diam ..... A. sphaerocephalus
2. Leaf faces densely rough-puberulent ..... var. hirtellus
2' Leaf faces glabrous (margins sometimes sparsely rough-puberulent) ..... var. sphaerocephalus
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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