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Taxon  Report  
Lepidium lasiocarpum  Nutt.
Shaggyfruit pepperweed
Lepidium lasiocarpum is an annual herb that is native to California, and also found elsewhere in western North America.
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial

Bloom Period
Subspecies and Varieties:
Genus: Lepidium
Family: Brassicaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Habitat: coastal

Communities: Coastal Strand, Coastal Sage Scrub, Shadscale Scrub, Creosote Bush Scrub, Valley Grassland

Name Status:
Accepted by PLANTS

Information about  Lepidium lasiocarpum from other sources
Nursery availability from CNPLX
Commercial availability unknown.

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Description, Range: Duration: Annual Nativity: Native Lifeform: Forb/Herb General: Annual herb, 15-40 cm tall, from a slender taproot; stems few to several per plant, erect to ascending (sometimes outer stems decumbent), and branching above the base; herbage hirsute to hispid with unbranched hairs. Leaves: Basal leaves petiolate, not forming distinct rosettes, usually early-withering; stem leaves alternate, usually short-petiolate; blades oblanceolate, 1-8 cm long and 4-30 mm wide, pinnatifid to dentate, the uppermost leaves sometimes entire. Flowers: Small and white, in multiple terminal racemes, each 2-10 cm long, often crowded on larger plants; pedicels flattened, 2-4 mm long, glabrous or pubescent; sepals 4, oblong, 1 mm long; petals 4 in a cross formation, 1 mm long, white. Fruits: Capsules round to ovate, flat, 2-3 mm across, with notch at the tip; persistent style absent or present but inconspicuous, 0.1 mm long, much smaller than the notch where it sits; seeds brown, ovate, 2 mm long. Ecology: Found in playas, washes, arroyos, beaches, saline soils, roadsides and other disturbed areas, below 6,500 ft (1981 m); flowers February-May. Distribution: CA, NV, UT, AZ, CO, NM, w TX; south to C. Amer. Notes: Lepidium is a genus in the mustard family with distinctive small, round, flat seed pods and small white flowers. The primary characteristic that distinguishes L. lasiocarpum from other similar species is its flattened, hairy fruiting pedicels (use your hand lens). It is also distinguished by this combination of traits: plants are taprooted annuals; stems and leaves are hirsute to hispid but not covered with scurfy scales; upper stem leaves are sessile to short-petiolate but not clasping the stem; racemes are erect and located at branch tips; flowers have only 2 stamens; seed pods are hairy, at least on the margins, and are not wrinkled. There are 2 subspecies: subsp. wrightii has seed pods covered in pustular-based hairs, and subsp. lasiocarpum has seed pods with non-pustular hairs. Ethnobotany: Plant used as a disinfectant; seeds were gathered, ground, parched, and eaten in a variety of ways. Synonyms: None Editor: SBuckley 2010, FSCoburn 2015, AHazelton 2017 Etymology: Lepidium comes from the Greek lepidion, meaning "a little scale," in reference to the flattened shape of the seed pods; lasiocarpum means having woolly seeds or fruits. (contributed by Mary Ann Machi)

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/02/2023).