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|Jepson eFlora: Taxon page
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|Family: Brassicaceae (Cruciferae)||View Description||Dichotomous Key|
|Genus: Streptanthus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Streptanthus howellii S. Watson
Habit: Perennial herb, glabrous; caudex simple or branched. Stem: 3--8 dm, simple (branched distally). Leaf: basal not rosetted, fleshy; mid-cauline petioled, 1.5--10 cm, broadly obovate to round, entire to wavy or obtusely dentate; distal narrowly oblong-oblanceolate to linear, unlobed, entire, base wedge-shaped to attenuate. Inflorescence: open; terminal sterile flower cluster 0. Flower: calyx +- bell-shaped, sepals 5--8 mm, oblong, not keeled, +- purple; petals 8--12 mm, 0.5--1 mm wide, not crinkled, maroon to purple; filaments free, in 3 pairs of unequal length, longest pair 6--7 mm; fertile anthers 3--3.5 mm. Fruit: spreading-ascending, 5.5--12 cm, 2.5--3.2(3.5) mm wide, straight to +- incurved, not constricted between seeds; valves glabrous, midvein distinct; stigma +- entire; pedicel spreading to ascending, 7--17 mm, straight. Seed: 24--44, 3--4 mm, broadly oblong to +- round; wing 0.5--1.1 mm wide, continuous. Chromosomes: 2n=28.
Ecology: Open conifer/hardwood forest on rocky serpentine; Elevation: 600--800 m. Bioregional Distribution: n KR (Del Norte Co.); Distribution Outside California: southwestern Oregon. Flowering Time: Jun--Jul
eFlora Treatment Author: Ihsan A. Al-Shehbaz
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory
Previous taxon: Streptanthus hispidus
Next taxon: Streptanthus insignis
Citation for this treatment: Ihsan A. Al-Shehbaz 2016. Streptanthus howellii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=45742, accessed on July 27, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on July 27, 2016.