Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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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.

PARIETARIA

PELLITORY

Annual or perennial herb, not stinging-hairy
Leaves alternate, 1–8 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 bracts
Flower: sepals 4, fused below
Staminate flower: stamens 4
Fruit ovoid, shiny
Species in genus: 20–30 species: worldwide
Etymology: (Latin: wall, from habitat of some)
Reference: [Hinton 1969 Sida 3:293–297]

Native

P. pensylvanica Willd.

Annual < 6 dm, decumbent to erect
Leaf: blade 7–90 mm, linear-lanceolate to ovate, base tapered to obtuse, tip generally acuminate to long-tapered, lowest veins generally from midrib
Flower: calyx lobes ± erect, 1.5–2 mm, acute, dark reddish brown
Fruit hidden between calyx lobes or not, 0.9–1.5 mm, 0.5–1 mm wide, ovate, ± (reddish) brown, tip obtuse
Chromosomes: 2n=16
Ecology: Dry ledges, slopes, shady waste areas
Elevation: < 2500 m.
Bioregional distribution: California Floristic Province, Sonoran Desert
Distribution outside California: US
Flowering time: Mar–Jul

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bioregional map for PARIETARIA%20pensylvanica being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Parietaria pensylvanica
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