Directory       News       Site Map       Home
    Jepson eFlora: Taxon page
Key to families | Table of families and genera

Previous taxon Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Previous taxon


Ihsan A. Al-Shehbaz, except as noted

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.
± 330 genera, 3780 species: worldwide, especially temperate. [Al-Shehbaz et al. 2006 Plant Syst Evol 259:89–120] 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 North Coast Ranges, Carrichtera annua (L.) DC. in South Coast, Iberis sempervirens L., Iberis umbellata L. in Peninsular Ranges, Teesdalia coronopifolia (Bergeret) Thell., Teesdalia nudicaulis (L.) W.T. Aiton in southern Outer North Coast Ranges, Central Coast. Cardaria, Coronopus moved to Lepidium; Caulostramina to Hesperidanthus; Guillenia to Caulanthus; Heterodraba to Athysanus; California taxa of Lesquerella to Physaria; Malcolmia africana to Strigosella. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Brassicaceae

Annual to subshrub [shrub]; hairs sessile, appressed, 2–5(8)-rayed. Leaf: basal rosetted, petioled, entire, dentate, or pinnately lobed; cauline sessile or petioled, bases not lobed. Inflorescence: elongated. Flower: sepals oblong to linear, erect, base of lateral pair sac-like or not; petals clawed, yellow or orange (white, purple, or brown). Fruit: silique, dehiscent, linear, cylindric, 4-sided, or flat parallel or perpendicular to septum, unsegmented; stigma entire or 2-lobed. Seed: 15–100, in 1 or 2 rows, plump or flattened, oblong, winged or not.
± 150 species: North America, Eurasia, northern Africa. (Greek: to help or save, from alleged medicinal properties of some species) [Rossbach 1958 Madroño 14:261–267] Fls, fruit, basal leaves needed for identification. All native California taxa related to Erysimum capitatum; hybridization blurs limits of some species.
Unabridged references: [Rollins 1993 Cruciferae of continental North America. Stanford Univ Press.]

Key to Erysimum

E. capitatum (Hook.) Greene WESTERN WALLFLOWER
Biennial or short-lived perennial herb. Stem: (0.5)1.2–10(12) dm. Leaf: 0.3–1.5(3) cm wide, linear to spoon-shaped or oblanceolate, flat, entire or dentate, hairs 2–4(7)-rayed; distal cauline sessile or short-petioled, entire or dentate. Flower: sepals 7–14 mm; petals 12–25(30) mm, (5)6–10(13) mm wide, orange to yellow (lavender to ± purple), claw 8–16 mm. Fruit: 3.5–11(15) cm, 1.3–3.3 mm wide, 4-angled or flat parallel to septum, not constricted between seeds; valves outside with 2–5-rayed hairs, inside glabrous, midvein distinct; style 0.2–2.5(3) mm; pedicels spreading to ascending, 4–17(25) mm. Seed: (40)54–82, 1.5–4 mm, oblong, tip winged or 0.
2n=36. Highly variable, most widespread sp. in California, of diverse habitats. Occasionally divided into several infraspecific taxa based on overlapping leaf characters. [Online Interchange]
Unabridged note: Expanded author citation: Erysimum capitatum (Douglas ex Hook.) Greene

E. capitatum var. capitatum
Leaf: basal, proximal cauline leaf adaxial hairs generally 3(7)-rayed. Flower: petals generally orange to yellow. Fruit: flat parallel to septum (4-angled). Seed: 2–4 mm, (0.8)1–2 mm wide, tip winged.
Common. Open areas, alpine, deserts, woodland, sandy areas, chaparral; < 4000 m. California; western North America. [Erysimum capitatum var. angustatum (Greene) Rossbach; Erysimum capitatum var. lompocense (Rossbach) Kartesz; Erysimum capitatum subsp. angustatum, ined.; Erysimum capitatum subsp. capitatum, ined.; Erysimum capitatum subsp. lompocense, ined.] Apparently hybridizes with Erysimum ammophilum, Erysimum franciscanum, Erysimum suffrutescens. Mar–Sep [Online Interchange]
Unabridged synonyms: [Erysimum asperum (Nutt.) DC. var. bealianum Jeps.; Erysimum asperum (Nutt.) DC. var. stellatum J.T. Howell; Erysimum capitatum var. bealianum (Jeps.) Rossbach; Erysimum insulare Greene var. angustatum (Greene) Jeps.; Erysimum moniliforme Eastw.; Erysimum suffrutescens (Abrams) Rossbach var. lompocense Rossbach; Erysimum capitatum subsp. angustatum, ined.; Erysimum capitatum subsp. lompocense, ined.]
Unabridged note: Expanded author citation: Erysimum capitatum (Douglas ex Hook.) Greene var. capitatum

Previous taxon: Erysimum capitatum
Next taxon: Erysimum capitatum var. purshii


Name search

Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Mar 30 2015
Citation for this treatment: [Author of taxon treatment] 2013. Erysimum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Mar 30 2015

Copyright © 2014 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.

Geographic subdivisions indicated for the distribution of Erysimum capitatum var. capitatum Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records


CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.