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Streptanthus diversifolius

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: StreptanthusView DescriptionDichotomous Key

Habit: Annual to perennial herb, generally +- glaucous; hairs simple or 0. Leaf: basal rosetted or not, petioled, entire or dentate to pinnately lobed or divided; cauline sessile, occasionally petioled, base generally lobed or clasping. Inflorescence: elongated. Flower: radial or bilateral; calyx urn- or occasionally bell-shaped, sepals erect, base +- sac-like, keeled or not; petal blade narrower to wider than proximal 1/2, generally channeled, margins +- crinkled or not; stamens in 3 pairs of unequal length, or 4 long and 2 short, longest filaments fused or free. Fruit: silique, dehiscent, linear, flat parallel to septum, unsegmented; stigma entire or 2-lobed. Seed: 10--120, in 1 row, generally winged.
Species In Genus: 35 species: southwestern United States, northern Mexico. Etymology: (Greek: twisted flower, from wavy-margined petals)
eFlora Treatment Author: Ihsan A. Al-Shehbaz

Streptanthus diversifolius S. Watson
Habit: Annual, glabrous throughout. Stem: erect, (1)2--9(10.5) dm, branched distally. Leaf: basal not rosetted, pinnately divided; mid-cauline petioled, 2--12 cm, pinnately divided into thread-like segments 0.4--2.7 cm, 0.5--1.5 mm wide, leaf base not lobed; distal cauline sessile, clasping, lance-linear to ovate or cordate, entire. Inflorescence: open; terminal sterile flower cluster 0; bracted below or between most proximal 1--2 flowers. Flower: calyx urn-shaped, sepals 5--7 mm, keeled, yellow or +- purple; petals 8--16 mm, 1.5--3.5 mm wide, recurved, crinkled, pale yellow to +- white, veins purple; filaments free, in 3 pairs of unequal length, longest pair 4--8 mm; fertile anthers 3.5--4 mm. Fruit: abruptly reflexed at stalk above receptacle, 3--9 cm, 1--1.5(2.2) mm wide, straight, not constricted between seeds; valves glabrous, midvein obscure; stigma +- 2-lobed; pedicels spreading, 2--10 mm, straight. Seed: (22)38--80, 1--1.5(2.2) mm, oblong; wing 0--0.1(0.4) mm wide at seed tip. Chromosomes: 2n=28.
Ecology: Open woodland, rocky slopes; Elevation: 200--1900 m. Bioregional Distribution: n SNF, c&s SN. Flowering Time: Apr--Jul
eFlora Treatment Author: Ihsan A. Al-Shehbaz
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botanical illustration including Streptanthus diversifolius


Citation for this treatment: Ihsan A. Al-Shehbaz 2012, Streptanthus diversifolius, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on September 22, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on September 22, 2018.

Streptanthus diversifolius
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© 1984 Robert E. Preston, Ph.D.
Streptanthus diversifolius
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© 2010 George W. Hartwell
Streptanthus diversifolius
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© 2006 George W. Hartwell
Streptanthus diversifolius
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© 2009 Barry Breckling
Streptanthus diversifolius
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© 2006 George W. Hartwell
Streptanthus diversifolius
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© 2015 Aaron Schusteff

More photos of Streptanthus diversifolius in CalPhotos

Geographic subdivisions for Streptanthus diversifolius:
n SNF, c&s SN.
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).

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