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|Family: Brassicaceae (Cruciferae)||View Description||Dichotomous Key|
|Genus: Caulanthus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Caulanthus cooperi (S. Watson) Payson
Habit: Annual. Stem: 1--8 dm, generally weak, not inflated, generally wavy and branched distally, glabrous or hairs appressed, 2-rayed, minute. Leaf: basal 1--8 cm, coarsely dentate to lobed (entire), oblanceolate to spoon-shaped; cauline sessile, lanceolate to oblong, entire to dentate, base lobed to clasping. Inflorescence: terminal sterile flower cluster 0. Flower: sepals 3--6.5 mm, +- purple or yellow-green; petals 4.5--9 mm, not wavy, +- purple or yellow-green; stamens 4 long, 2 short, filaments free. Fruit: spreading to reflexed, 2--6 cm, 1.5--2.5 mm wide, cylindric, generally curved; style 0.2--2.7 mm, stigma +- 2-lobed; pedicel reflexed, 1--4.5 mm. Seed: 24--48, 1--2 mm, oblong; cotyledons entire. Chromosomes: 2n=28.
Ecology: Common. Open, sandy, gravelly soil, generally among shrubs; Elevation: 300--2500 m. Bioregional Distribution: n TR, e PR, s SNE, D; Distribution Outside California: to southwestern Utah, western Arizona, Baja California. Flowering Time: Mar--Apr Note: Plants with stem, fruit +- green or straw-colored generally mixed with plants with stem, fruit dark purple.
Unabridged Synonyms: Thelypodium cooperi S. Watson; Guillenia cooperi (S. Watson) Greene
eFlora Treatment Author: Ihsan A. Al-Shehbaz
Jepson Online Interchange
Previous taxon: Caulanthus californicus
Next taxon: Caulanthus coulteri
Citation for this treatment: Ihsan A. Al-Shehbaz 2017. Caulanthus cooperi, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=18395, accessed on March 25, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on March 25, 2017.