Jepson eFlora
Key to families | Table of families and genera

Key to Urtica

View taxon page for Urtica

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

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