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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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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.Key to Parietaria
20–30 species: worldwide temperate, subtropics. (Latin: wall, from habitat of some)
Unabridged references: [Hinton 1969 Sida 3:293–297]
Unabridged note: Parietaria floridana Nutt. collected as nursery weed in South Coast.
Perennial herb 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; native to Eurasia, northern Africa. Invasive in coastal urban settings. Nov–Aug [Online Interchange]
Previous taxon: Parietaria hespera var. hespera
Next taxon: Parietaria pensylvanica
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 23 2014
Citation for this treatment: [Author of taxon treatment] 2013. Parietaria, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=36254, accessed on Jul 23 2014
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© 1989 Dean Wm. Taylor
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