Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.



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]



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]


P. hespera Hinton

Annual 2–55 cm, decumbent to erect, sometimes matted
Leaf: blade 5–20 mm, ovate to round, base generally truncate to cordate, tip notched to short-acuminate, lowest veins often from basal margin
Flower: calyx lobes generally 2–3 mm, acute or acuminate
Fruit hidden between calyx lobes, 0.9–1.3 mm, ovate, tan to ± brown, tip obtuse
Ecology: Chaparral, deserts, dry woodlands, roadsides, often moist shade, sandy or rocky soils
Elevation: < 1400 m.
Bioregional distribution: San Francisco Bay Area, Southwestern California, Desert
Distribution outside California: to Utah, New Mexico, nw Mexico
Synonyms: P. floridana Nutt. misapplied


var. hespera

Leaf: blade ovate, longer than wide
Flower: calyx lobes erect, acute, dark reddish brown
Ecology: ± habitats and range of sp.
Bioregional distribution: San Francisco Bay Area, Southwestern California, Desert
Flowering time: Feb–Jun

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bioregional map for PARIETARIA%20hespera%20var.%20hespera 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 hespera var. hespera
Retrieve dichotomous key for Parietaria
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
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