Jepson Herbarium
		University of California, Berkeley

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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

Hairs sparse to dense, stinging 0.
Stem: branches from base, decumbent to erect, generally herbaceous.
Leaf: alternate, blade 1–9 cm, lanceolate to round, entire; stipules 0; crystals round.
Inflorescence: head-, spike-, or panicle-like, generally few-flowered; flowers subtended by involucre of 1–3 lance- linear bracts.
Flower: sepals 4, fused below.
Staminate flower: stamens 4.
Fruit: ovoid, shiny.
20–30 species: worldwide temperate, subtrop. (Latin: wall, from habitat of some)
Unabridged references: [Hinton 1969 Sida 3:293–297]
Unabridged note: Parietaria floridana Nutt. collected as nursery weed in SCo.

Perennial 1–8 dm, decumbent to erect.
Stem: becoming woody.
Leaf: blade 11–90 mm, narrowly lanceolate to wide- ovate, base tapered to round; tip acuminate to long- tapered.
Flower: calyx lobes 2–3.5 mm.
Fruit: 1–1.5 mm, 0.5–0.9 mm wide, ± black, tip acute.
Roadsides, disturbed areas on coastal bluffs; < 125 m. s Sacramento Valley, Central Coast, San Francisco Bay Area, South Coast;

Previous taxon: Parietaria hespera var. hespera
Next taxon: Parietaria pensylvanica

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].

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Bioregions in which taxon occurs	Red area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon; 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.
Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates.	Map made in collaboration with Scott Loarie. Data provided by the participants of the Consortium of California Herbaria. View all CCH records   CCH collections by month Duplicates counted once; synonyms included. Species do not include records of infraspecific taxa. Blue line denotes Manual flowering time.