|University of California, Berkeley|
Key to families | Table of families and genera
1. Annual 1–6(8) dm; leaf blade 18–40(90) mm; inflorescence generally ± head- or spike-like, often < petiole, of staminate and pistillate flowers; fruit deltate ..... U. urens
1' Perennial herb 5–30 dm; leaf blade 60–200 mm; inflorescence raceme- or panicle-like, generally > petiole, of staminate or pistillate flowers; fruit ovate ..... U. dioica
2. Non-stinging hairs on stem, leaf 0 to ± dense, occasionally > 1 mm, those on abaxial veins appressed; stem green ..... subsp. gracilis
2' Non-stinging hairs on stem, leaf dense, < 1 mm, those on abaxial veins erect; stem gray-green ..... subsp. holosericea
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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