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Lepidium nitidum

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)

Lepidium nitidum Nutt.
NATIVE
Habit: Annual, puberulent. Stem: erect to decumbent, 1--many from base, (0.4)1--3.5(4.2) dm, occasionally branched distally. Leaf: basal not rosetted, early-deciduous, (0.8)1.5--7.3(8) cm, pinnately divided, lobes linear (oblong to lanceolate), entire (dentate); mid-cauline similar to basal but smaller, occasionally undivided, linear, petioled to sessile, base not lobed. Inflorescence: much-elongated; rachis puberulent, hairs straight. Flower: sepals (0.7)0.9--1.3(1.5) mm; petals 0 or (0.8)1.2--2(2.8) mm, 0.2--1(1.6) mm wide, oblanceolate, white; stamens 4. Fruit: (2.5)3--5.5(6.5) mm, (2)2.6--5(5.4) mm wide, round to broadly ovate, flat, tip winged, notch 0.3--0.7(1) mm; valves glabrous or margin sparsely puberulent, not or obscurely veined; style 0--0.1 mm, included in notch; pedicel spreading (+- erect), 2.5--5(6.5) mm, strongly flattened, puberulent or only adaxially. Seed: 1.6--2.6 mm, ovate.
Ecology: Alkaline soils, meadows, pastures, dry vernal pools, fields, beaches; Elevation: < 1000 m. Bioregional Distribution: CA (exc e D); Distribution Outside California: to Washington, Baja California. Flowering Time: Feb--Mar
Synonyms: Lepidium nitidum var. howellii C.L. Hitchc.; Lepidium nitidum var. oreganum (Greene) C.L. Hitchc.
eFlora Treatment Author: Ihsan A. Al-Shehbaz
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Citation for this treatment: Ihsan A. Al-Shehbaz 2016. Lepidium nitidum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=30549, accessed on February 08, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 08, 2016.


Lepidium nitidum
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© 2007 Carol W. Witham
Lepidium nitidum
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© 1983 Robert E. Preston, Ph.D.
Lepidium nitidum
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© 2015 Neal Kramer
Lepidium nitidum
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© 2003 Keir Morse
Lepidium nitidum
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© 2007 Carol W. Witham
Lepidium nitidum
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© 2008 Keir Morse

More photos of Lepidium nitidum in CalPhotos


Geographic subdivisions for Lepidium nitidum:
CA (exc e D);
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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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).

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