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Lepidium jaredii

JARED'S PEPPERGRASS


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.
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 jaredii Brandegee
NATIVE
Habit: Annual, sparsely soft-hairy. Stem: erect to ascending, 1 to several from base, 1--6(7) dm, branched distally. Leaf: basal not rosetted, early-deciduous; mid-cauline 2--7.5(10) cm, 0.2--1 cm wide, lanceolate to linear, entire or few toothed near tip, base tapered, not lobed. Inflorescence: much-elongated; rachis soft-curved-hairy, or glabrous. Flower: sepals 1.8--2.5 mm; petals 2.8--4 mm, 1.2--1.8 mm wide, spoon-shaped, lemon yellow, +- white in age; stamens 6. Fruit: 3--3.8(4) mm, 2.8--3.2(3.5) mm wide, widely ovate, flat, tip wingless, notch 0 (0.1 mm); valves smooth or minutely papillate, glabrous, obscurely veined; style 0.3--0.8(1) mm; pedicel 5--15 mm, cylindric, spreading, hairy adaxially. Seed: 1.8--2.2 mm, oblong. Chromosomes: 2n=16.
Ecology: Alkali bottoms, slopes, washes, dry hillsides, vertic clay, acidic, gypsiferous; Elevation: 500--700 m. Bioregional Distribution: sw SnJV, se SCoRI. Flowering Time: Mar--Apr
Synonyms: Lepidium jaredii subsp. album Hoov. Listed in CNPS Inventory
Jepson eFlora Author: Ihsan A. Al-Shehbaz
Reference: Al-Shehbaz et al. 2002 Novon 12:5--11
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

Previous taxon: Lepidium heterophyllum
Next taxon: Lepidium lasiocarpum subsp. lasiocarpum

Botanical illustration including Lepidium jarediibotanical illustration including Lepidium jaredii


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Citation for this treatment: Ihsan A. Al-Shehbaz 2012, Lepidium jaredii, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=30542, accessed on December 04, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on December 04, 2024.

Lepidium jaredii
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©2010 Chris Winchell
Lepidium jaredii
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©2017 Chris Winchell
Lepidium jaredii
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©2017 Chris Winchell
Lepidium jaredii
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©2010 Chris Winchell
Lepidium jaredii
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©2008 Aaron Schusteff

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Geographic subdivisions for Lepidium jaredii:
sw SnJV, se SCoRI.
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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 occurrence).






 

Data provided by the participants of the  Consortium of California Herbaria.

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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month Flowering-Fruiting Monthly Counts

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 (fruiting time in some monocot genera).