The Jepson Manual: Higher Plants of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

Names are linked to treatments from the Manual


Key to URTICA

N.B.: couplets are linked, e.g., 1. is linked to 1'.

  1. Annual 1–6 dm; leaf blade generally < 40 mm; inflorescence generally ± head-like, often < petiole, with staminate and pistillate flowers; fruit deltate
U. urens
  1' Perennial 10–30 dm; leaf blade generally > 40 mm; inflorescence spike-, raceme-, or panicle-like, generally > petiole, with staminate or pistillate flowers; fruit ovate
U. dioica
    2. Stem and lower leaf surface with no or moderate nonstinging hairs; stem green; Northwestern California, n Central Coast
subsp. gracilis
    2' Stem and lower leaf surface with moderate to dense nonstinging hairs; stem gray-green; California Floristic Province (± except Northwestern California)
subsp. holosericea


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