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Lepidium chalepense

Higher Taxonomy
Family: Brassicaceae (Cruciferae)View DescriptionDichotomous Key

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

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)

Lepidium chalepense L.
Habit: Perennial herb, rhizomed, densely stiff-hairy, occasionally glabrous distally. Stem: erect or decumbent proximally, (0.8)2.1--6.6(9.2) dm, many-branched distally. Leaf: basal not rosetted, early-deciduous, 2--9(14) cm, obovate to spoon-shaped or ovate; mid-cauline (1.5)2.6--9.3(13.2) cm, (0.7)1.2--3.1(4.5) cm wide, oblong to lanceolate, obovate, or oblanceolate, base lobed to clasping, entire to +- dentate. Inflorescence: panicle, elongated; rachis glabrous or puberulent, hairs curved or straight. Flower: sepals 1.7--3 mm; petals 3--5 mm, 1.2--2.4 mm wide, obovate, white; stamens 6. Fruit: 3.5--5.8(7) mm, (3.5)4--6.2(7) mm wide, obovoid, tip wingless, notch 0; valve walls thin, smooth, glabrous, generally not veined; style (0.8)1.2--2(2.3) mm; pedicel ascending to spreading, 5--16(19) mm, cylindric, glabrous or sparsely puberulent adaxially. Seed: 1.5--2.3 mm, ovate. Chromosomes: 2n=48,80,128.
Ecology: Disturbed areas, pastures, fields, riverbanks; Elevation: 300--4200 m. Bioregional Distribution: CA-FP, GB; Distribution Outside California: Canada, western and central United States; native to western and central Asia. Flowering Time: May--Jun
Synonyms: Cardaria chalepensis (L.) Hand.-Mazz.; Cardaria draba (L.) Desv. subsp. chalepensis (L.) O.E. Schulz
eFlora Treatment Author: Ihsan A. Al-Shehbaz
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botanical illustration including Lepidium chalepense


Citation for this treatment: Ihsan A. Al-Shehbaz 2016. Lepidium chalepense, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 28, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 28, 2016.

Lepidium chalepense
click for enlargement
© 2004 Steve Matson
Lepidium chalepense
click for enlargement
© 2004 Steve Matson
Lepidium chalepense
click for enlargement
© 2004 Steve Matson
Lepidium chalepense
click for enlargement
© 2004 Steve Matson
Lepidium chalepense
click for enlargement
© 2004 Steve Matson
Lepidium chalepense
click for enlargement
© 2004 Steve Matson

More photos of Lepidium chalepense in CalPhotos

Geographic subdivisions for Lepidium chalepense:
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.