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Lepidium lasiocarpum subsp. lasiocarpum


Higher Taxonomy
Family: Brassicaceae (Cruciferae)View DescriptionDichotomous Key
Common Name: MUSTARD FAMILY
Habit: Annual to shrub; sap pungent, watery. Leaf: generally simple, alternate; generally both basal, cauline; stipules 0. Inflorescence: generally raceme, generally not bracted. Flower: bisexual, generally radial; sepals 4, generally free; petals (0)4, forming a cross, generally white or yellow to purple; stamens generally 6 (2 or 4), 4 long, 2 short (3 pairs of unequal length); ovary 1, superior, generally 2-chambered with septum connecting 2 parietal placentas; style 1, stigma entire or 2-lobed. Fruit: capsule, generally 2-valved, "silique" (length >= 3 × width) or "silicle" (length < 3 × width), dehiscent by 2 valves or indehiscent, cylindric or flat parallel or perpendicular to septum, segmented or not. Seed: 1--many, in 1 or 2 rows per chamber, winged or wingless; embryo strongly curved.
Genera In Family: +- 330 genera, 3780 species: worldwide, especially temperate. Note: Highest diversity in Mediterranean area, mountains of southwestern Asia, adjacent central Asia, western North America; some Brassica species are oil or vegetable crops; Arabidopsis thaliana used in experimental molecular biology; many species are ornamentals, weeds. Aurinia saxatilis (L.) Desvaux in cultivation only. Aubrieta occasional waif in central NCoR, Carrichtera annua (L.) DC. in SCo, Iberis sempervirens L., Iberis umbellata L. in PR, Teesdalia coronopifolia (Bergeret) Thell., Teesdalia nudicaulis (L.) W.T. Aiton in southern NCoRO, CCo. Cardaria, Coronopus moved to Lepidium; Caulostramina to Hesperidanthus; Guillenia to Caulanthus; Heterodraba to Athysanus; California taxa of Lesquerella to Physaria; Malcolmia africana to Strigosella.
eFlora Treatment Author: Ihsan A. Al-Shehbaz, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: LepidiumView DescriptionDichotomous Key


Common Name: PEPPERGRASS, PEPPERCRESS
Habit: Annual to perennial herb (shrub); hairs 0 or simple. Leaf: basal rosetted or not, petioled, entire, dentate, to 1--3-pinnately lobed; cauline short-petioled to sessile, base occasionally lobed to clasping. Inflorescence: elongated or congested. Flower: sepals erect or spreading, oblong to ovate, base not sac-like; petals linear to obovate, white or yellow (pink or purple), occasionally reduced or 0; stamens 2, 4, or 6. Fruit: silicle, generally dehiscent, oblong to ovate, obcordate, or round (spectacle-shaped), flat perpendicular to septum (inflated), unsegmented. Seed: 2(4), gelatinous when wet; wing narrow or 0.
Species In Genus: 220 species: all continents except Antarctica. Etymology: (Greek: little scale, from fruit)
eFlora Treatment Author: Ihsan A. Al-Shehbaz
Reference: Al-Shehbaz et al. 2002 Novon 12:5--11
Unabridged Reference: Hitchcock 1936 Madroño 3:265--300
Lepidium lasiocarpum Nutt. subsp. lasiocarpum
NATIVE
Habit: Annual; hairs stiff, spreading. Stem: erect to decumbent, 1 to several from base, (0.2)0.6--3(3.8) dm, branched distally. Leaf: basal not rosetted, late-deciduous, (0.7)1.5--4.5(7.5), spoon-shaped to oblanceolate, 1--2-pinnately lobed or dentate; mid-cauline short-petioled, (0.7)1.2--3.3(5) cm, (2)4--12 mm wide, lanceolate to oblanceolate, +- entire or dentate, not lobed. Inflorescence: much-elongated; rachis spreading stiff-hairy or bristly. Flower: sepals 1--1.3(1.5) mm, oblong; petals 0 or (0.3)0.6--1.5(2) mm, (0.1)0.2--0.5 mm wide, oblanceolate to linear, white; stamens 2. Fruit: 2.8--4(4.6) mm, 2.4--3.6(4) mm wide, ovate to ovate-round, flat, tip winged, notch (0.2)0.3--0.6(0.7) mm; valves stiff-hairy or bristly at least on margin, not veined; style 0--0.1 mm, included in notch; pedicel spreading, (1.8)2--4(4.6) mm, strongly flattened, hairy at least adaxially. Seed: 1.4--2.2 mm, ovate. Chromosomes: 2n=32.
Ecology: Dry flats, washes, streambeds, roadsides, sagebrush scrub, pinyon/juniper woodland; Elevation: 50--2700 m. Bioregional Distribution: SW, W&I, D; Distribution Outside California: to Colorado, Texas, Mexico. Flowering Time: Mar--Jun
Synonyms: Lepidium lasiocarpum var. lasiocarpum
Unabridged Note: Lepidium lasiocarpum subsp. wrightii (A. Gray) Thell. in Arizona to New Mexico, northern Mexico.
Jepson eFlora Author: Ihsan A. Al-Shehbaz
Reference: Al-Shehbaz et al. 2002 Novon 12:5--11
Unabridged Reference: Hitchcock 1936 Madroño 3:265--300
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Botanical illustration including Lepidium lasiocarpum subsp. lasiocarpum

botanical illustration including Lepidium lasiocarpum subsp. lasiocarpum

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Citation for this treatment: Ihsan A. Al-Shehbaz 2012, Lepidium lasiocarpum subsp. lasiocarpum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=91771, accessed on October 20, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on October 20, 2019.

Lepidium lasiocarpum subsp. lasiocarpum
click for enlargement
© 2010 Thomas Stoughton
Lepidium lasiocarpum subsp. lasiocarpum
click for enlargement
© 2015 Steve Matson
Lepidium lasiocarpum subsp. lasiocarpum
click for enlargement
© 2016 Keir Morse
Lepidium lasiocarpum subsp. lasiocarpum
click for enlargement
© 2010 Thomas Stoughton
Lepidium lasiocarpum subsp. lasiocarpum
click for enlargement
© 2012 Keir Morse
Lepidium lasiocarpum subsp. lasiocarpum
click for enlargement
© 2015 Steve Matson

More photos of Lepidium lasiocarpum subsp. lasiocarpum in CalPhotos



Geographic subdivisions for Lepidium lasiocarpum subsp. lasiocarpum:
SW, W&I, D
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.