|University of California, Berkeley|
|Directory News Site Map Home|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Annual, perennial herb [to shrub, soft-wooded tree], hairs stinging and not [glabrous]; monoecious or dioecious; wind-pollinated. Leaf: alternate or opposite, generally stipuled, petioled, blade often with translucent, raised dots due to crystals in epidermal cells. Inflorescence: axillary, 1-flowered or head-, raceme-, or panicle-like. Flower: generally unisexual, small, ± green; sepals generally 4–5, free to fused; petals 0. Staminate flower: stamens generally 4–5, opposite sepals, incurved in bud, reflexing suddenly when flower opens. Pistillate flower: ovary 1, superior, chamber 1, style 0–1, stigma 1, generally hair-tufted. Fruit: generally achene.
50 genera, 700 species: worldwide; some cultivated (Boehmeria, ramie; Pilea, clearweed). [Boufford 1997 FNANM 3:400–413] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Miller 1971 J Arnold Arbor 52:40–68]
Key to Urticaceae
Annual, perennial herb [to shrub], weak, stinging hairs 0 or few to many; monoecious or dioecious. Stem: branched or not, erect, spreading, or decumbent. Leaf: opposite, lanceolate to cordate, toothed, prominently 3–5-veined from base; crystals round to elongate. Inflorescence: head-, raceme-, or panicle-like. Staminate flower: sepals 4, ± free, green, sharp-bristly; stamens 4. Pistillate flower: sepals 4, ± free, outer 2 < inner 2. Fruit: lenticular to deltate, enclosed by 2 inner sepals.Key to Urtica
± 45 species: especially temperate. (Latin: to burn, from stinging hairs)
Unabridged references: [Woodland 1982 Syst Bot 7:282–290]
Perennial herb 5–30 dm, from rhizome, ± erect, stinging hairs few to many, non-stinging 0 to dense, generally shorter. Leaf: blade 6–20 cm, narrow-lanceolate to wide-ovate, base tapered to cordate. Inflorescence: spike-, raceme-, or panicle-like, 1–7 cm, generally > petiole, of staminate or pistillate flowers. Fruit: ovate. Urtica dioica subsp. dioica dioecious, native to Eurasia; naturalized in North America; report from California in FNANM based on an unconfirmed collection. [Online Interchange]
Generally monoecious. Stem: 10–30 dm. Leaf: narrow-lanceolate to wide-ovate.
2n=26. Meadows, seeps, springs, margins of marshes, streams, lakes, moist areas in chaparral, coastal scrub; < 3370 m. California Floristic Province (except but expected North Coast, Sierra Nevada Foothills), Great Basin Floristic Province, Mojave Desert (uncommon); western United States, northern Mexico. Plants in shade tend to have wider leaves, fewer hairs, so approach Urtica dioica subsp. gracilis. Jun–Sep [Online Interchange]
Previous taxon: Urtica dioica subsp. gracilis
Next taxon: Urtica urens
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Nov 27 2014
Citation for this treatment: [Author of taxon treatment] 2013. Urtica, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=53303, accessed on Nov 27 2014
Copyright © 2014 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
|Urtica dioica subsp. holosericea|
See CalPhotos for additional images
© 2004 George W. Hartwell
|Geographic subdivisions indicated for the distribution of Urtica dioica subsp. holosericea|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
View elevation by latitude chart
| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records
CCH collections by month