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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 hesperidis Jeps.
Habit: Annual, glabrous, generally +- yellow. Stem: 1--3 dm, simple or branched at base. Leaf: basal not rosetted, broadly obovate, coarse-blunt-dentate distally; mid-cauline sessile, 1--4 cm, ovate to lanceolate, generally entire, +- yellow, base clasping; distal reduced, entire. Inflorescence: 1-sided, axis wavy; terminal sterile flower cluster 0. Flower: calyx urn-shaped, sepals 5--8 mm, keeled, lance-ovate, yellow-green; petals 6--8 mm, 1--1.3 mm wide, not crinkled, +- white, veins purple; filaments in 3 pairs of unequal length; longest pair fused, 6--9 mm, lower pair fused proximally; fertile anthers 1.7--2.5 mm. Fruit: spreading-ascending, 3--6 cm, 0.9--1.1 mm wide, generally straight, +- constricted between seeds; valves glabrous, midvein obscure; stigma entire; pedicels spreading-ascending, 1--2 mm. Seed: 26--38, 1.2--1.5 mm, oblong; wing 0--0.1 mm wide at tip. Chromosomes: 2n=28.
Ecology: Serpentine barrens, associated openings in chaparral/oak woodland, cypress woodland; Elevation: 250--600 m. Bioregional Distribution: s NCoRI (Napa, s Lake cos.). Flowering Time: May--Jul
Synonyms: Streptanthus breweri A. Gray var. hesperidis (Jeps.) Jeps.
eFlora Treatment Author: Ihsan A. Al-Shehbaz
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory
Previous taxon: Streptanthus gracilis
Next taxon: Streptanthus hispidus
Citation for this treatment: Ihsan A. Al-Shehbaz 2016. Streptanthus hesperidis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=45740, accessed on December 07, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on December 07, 2016.