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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Raymond Cranfill, except as specified

Annual or perennial herb, often rhizomed, often of wet open places, generally monoecious; roots fibrous, hairy
Stem generally 3-sided
Leaves often 3-ranked; sheath generally closed; ligule generally 0; blade (0) various, parallel-veined
Inflorescence: spikelets variously clustered; flowers generally sessile in axil of flower bract
Flower small, generally wind-pollinated; perianth 0 or bristle-like; stamens generally 3, anthers attached at base, 4-chambered; ovary superior, 1-chambered, 1-ovuled, style 2–3-branched
Fruit: achene, generally 3-sided
Genera in family: ± 110 genera, 3600 species: worldwide, especially temp
Reference: [Tucker 1987 J Arnold Arbor 68:361–445]
Difficult: taxa differ in technical characters of inflorescence and fruit.


Gordon C. Tucker

Annual, glabrous
Stem ± erect, 1–20 cm
Leaves basal, 1–3
Inflorescence: bracts 1–3, leaf-like; spikelets 50–150, dense, spiralled, sessile, in dense, spheric to cylindric spikes; flower bracts spirally arranged, (0)1–2 per flower, 100–400 per spikelet, outer > inner, awned at tip, with 1 central green and 2 lateral whitish veins, margins reddish, inner bract translucent
Flower bisexual; perianth 0; stamens 1–3, anthers 0.2–0.3 mm; styles 2-branched
Fruit 3-angled to subcylindric, abruptly soft-pointed, bumpy or warty, brown
Etymology: (Greek: falling chaff, from translucent inner flower bract)
Reference: [Friedland 1941 Amer J Bot 28:855–861]


L. occidentalis (A. Gray) G.C. Tucker

Stem 1–7 cm
Inflorescence: spikes 1–2, 2–5 mm, dense, generally ± spheric; outer flower bract lanceolate, body 0.5–0.8 mm, awn (0.5)1–1.5 mm; inner flower bract ± = fruit
Fruit 0.5–0.6 mm, widest at or just below tip, finely pitted, light brown; faces convex
Ecology: Wet soil
Elevation: 1200–1900 m.
Bioregional distribution: Outer North Coast Ranges, Sierra Nevada, Peninsular Ranges
Distribution outside California: to Washington
Synonyms: Hemicarpha o. A. Gray

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bioregional map for LIPOCARPHA%20occidentalis 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 Lipocarpha occidentalis
Retrieve dichotomous key for Lipocarpha
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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