|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Urticaceae||View Description||Dichotomous Key|
|Genus: Urtica||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Urtica urens L.
Habit: Annual 1--6(8) dm, from slender taproot, monoecious; non-stinging hairs 0 to moderate. Stem: simple or branched, erect. Leaf: blade 18--40(90) mm, elliptic to broad-elliptic, base wedge-shaped, margins coarse-serrate, tip acute. Inflorescence: generally head- or spike-like, 5--25 mm, often < petiole, of staminate and pistillate flowers. Fruit: 1.5--2.5 mm, deltate. Chromosomes: 2n=24,26,52.
Ecology: Disturbed areas, stream banks, shaded areas in grassland, oak woodland, chaparral, coastal-sage scrub, riparian woodland; Elevation: < 1000 m. Bioregional Distribution: NCo, NCoRO, n&s SNF, Teh, GV, CW, SW, w DSon (Coachella Valley), reported from MP; Distribution Outside California: native to Europe. Flowering Time: Jan--Jun
eFlora Treatment Author: Robert E. Preston & Dennis W. Woodland
Jepson Online Interchange
Previous taxon: Urtica dioica subsp. holosericea
Next taxon: Valerianaceae
Citation for this treatment: Robert E. Preston & Dennis W. Woodland 2017. Urtica urens, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=47589, accessed on March 23, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on March 23, 2017.