Erysimum capitatum var. capitatum

Conservation concern
Synonyms: Cheiranthus angustatus Greene Cheiranthus arkansanus (Nuttall) Greene Cheiranthus californicus (Greene) Greene Cheiranthus elatus (Nuttall) Greene Cheiranthus pacificus E. Sheldon Cheiranthus wheeleri (Rothrock) Greene Cheirinia arkansana (Nuttall) Moldenke Cheirinia elata (Nuttall) Rydberg Cheirinia wheeleri (Rothrock) Rydberg Erysimum arkansanum Nuttall Erysimum asperum var. arkansanum Jepson Erysimum asperum var. bealianum (Douglas ex Hooker) B. Boivin Erysimum asperum var. capitatum (Nuttall) Torrey Erysimum asperum var. elatum J. T. Howell Erysimum asperum var. stellatum (Greene) Rossbach Erysimum californicum (Abrams) Rossbach Erysimum capitatum var. angustatum (Jepson) Rossbach Erysimum capitatum var. bealianum (J. T. Howell) Twisselmann Erysimum capitatum var. stellatum Rossbach Erysimum capitatum var. washoense (Greene) Jepson Erysimum elatum Erysimum insulare var. angustatum Rossbach Erysimum moniliforme Erysimum suffrutescens var. lompocense Erysimum tilimii Erysimum wheeleri
Treatment appears in FNA Volume 7. Treatment on page 538. Mentioned on page 537.

Proximal leaves with mostly 3(–7)-rayed trichomes adaxially. Flowers: petals usually orange, sometimes orange-yellow or yellow. Fruits usually latiseptate, rarely 4-angled. Seeds 2–4 × (0.8–)1–2 mm; winged at least distally or, rarely, wing rudimentary. 2n = 36.

Phenology: Flowering (Jan-)Mar–Sep.
Habitat: Hillsides, open slopes, valley bottoms, alpine areas, deserts, woodlands, sandy mesas, chaparral clearings
Elevation: 0-1700 m


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Ariz., Ark., Calif., Idaho, Ill., Ind., Iowa, Mo., Nev., Ohio, Okla., Oreg., Tenn., Tex., Wash., Mexico (Durango, San Luis Potosí).


Of conservation concern.

Although its overall distribution is extensive, var. capitatum has been collected only sporadically outside the main range in western Idaho, western Nevada, and the Pacific states. There is some local differentiation in California that has been recognized formally. For example, some populations in the Mohave desert in Kern, Los Angeles, and San Bernardino counties, as well as disjunct ones in eastern San Luis Obispo County, differ from typical var. capitatum by having yellow petals, fruits to 3.3 mm wide, and seeds to 4 × 2 mm; these were recognized by G. B. Rossbach (1958) and R. C. Rollins (1993) as var. bealianum. Variety angustatum, which is highly localized in Contra Costa County and was recognized by both Rossbach and Rollins, differs from typical var. capitatum by having elongated (versus not elongated) woody caudices, 4-angled (versus latiseptate) fruits, and much-branched (versus moderately-branched or simple) fruiting racemes.

Selected References


Lower Taxa

Ihsan A. Al-Shehbaz +
(Douglas ex Hooker) Greene +
Cheiranthus capitatus +
Ariz. +, Ark. +, Calif. +, Idaho +, Ill. +, Ind. +, Iowa +, Mo. +, Nev. +, Ohio +, Okla. +, Oreg. +, Tenn. +, Tex. +, Wash. +, Mexico (Durango +  and San Luis Potosí). +
0-1700 m +
Hillsides, open slopes, valley bottoms, alpine areas, deserts, woodlands, sandy mesas, chaparral clearings +
Flowering (Jan-)Mar–Sep. +
Fl. Francisc., +
Conservation concern +
Cheiranthus angustatus +, Cheiranthus arkansanus +, Cheiranthus californicus +, Cheiranthus elatus +, Cheiranthus pacificus +, Cheiranthus wheeleri +, Cheirinia arkansana +, Cheirinia elata +, Cheirinia wheeleri +, Erysimum arkansanum +, Erysimum asperum var. arkansanum +, Erysimum asperum var. bealianum +, Erysimum asperum var. capitatum +, Erysimum asperum var. elatum +, Erysimum asperum var. stellatum +, Erysimum californicum +, Erysimum capitatum var. angustatum +, Erysimum capitatum var. bealianum +, Erysimum capitatum var. stellatum +, Erysimum capitatum var. washoense +, Erysimum elatum +, Erysimum insulare var. angustatum +, Erysimum moniliforme +, Erysimum suffrutescens var. lompocense +, Erysimum tilimii +  and Erysimum wheeleri +
Erysimum capitatum var. capitatum +
Erysimum capitatum +
variety +