Jepson Flora Project: Jepson Interchange    

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

URTICACEAE

NETTLE FAMILY

Dennis W. Woodland

Annual to (soft-wooded) trees, glabrous or stinging-hairy, monoecious or dioecious
Leaves alternate or opposite, generally stipuled, petioled, often with embedded crystals
Inflorescence various, axillary
Flowers generally unisexual, small, greenish; sepals generally 4–5, free to fused; petals 0
Staminate flower: stamens generally 4–5, opposite sepals, in bud incurved, then springing out
Pistillate flower: ovary 1, superior, chamber 1, style 0–1, stigma 1, generally hair-tufted
Fruit: generally achene (drupe)
Genera in family: 50 genera, 700 species: worldwide; some cultivated (Boehmeria ; Pilea , clearweed)
Reference: [Miller 1971 J Arnold Arb 52:40–68]
Wind-pollinated.

HESPEROCNIDE

WESTERN NETTLE

Annual, erect, slender, stinging-hairy, monoecious
Leaves opposite, toothed
Inflorescence generally head-like, with both staminate and pistillate flowers
Staminate flower: sepals 4, ± free; stamens 4
Pistillate flower: sepals 2–4, ± equal, fused ± to tip
Fruit lenticular, enclosed by ovate, sac-like, membranous calyx
Species in genus: 2 species: CA, Hawaii
Etymology: (Greek: western nettle)
Reference: [Woodland et al. 1976 Can J Bot 54:374–383]

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