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Key to families | Table of families and genera
This text currently parallels The Jepson Manual: Vascular Plants of California, Second Edition that is now available at the University of California Press.
Text appearing in blue on this page will not appear in the printed book; it will be displayed only on the Web. Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.
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.
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, n 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 CA taxa related to Erysimum capitatum; hybridization blurs limits of some species
Unabridged references: [Rollins 1993 Cruciferae of continental North America. Stanford Univ Press.]
1. Petals 3–9(12) mm, 1.5–3 mm wide
2. Fr valves densely hairy inside; sepals 1.8–3.2 mm; petal claw 1.5–3.5 mm ..... E. cheiranthoides
2' Fr valves glabrous (sparsely hairy) inside; sepals 4–8 mm; petal claw 3–8 mm ..... E. repandum
1' Petals (10)13–30(35) mm, 3–10(15) mm wide
3. Most proximal stems woody; plant generally subshrub
4. Fr hairs 2-rayed; stigma lobes 2, prominent, longer than wide; petals orange to yellow, brown, red, purple, violet, or white ..... E. cheiri
4' Fr hairs 2–4-rayed; stigma lobes obscure, as long as wide; petals yellow or cream
5. Fr flat perpendicular to septum; leaf hairs 2(3)-rayed ..... E. insulare
5' Fr flat parallel to septum or 4-angled; leaf hairs 2–5-rayed
6. Distal leaves petioled; fruit flat parallel to septum; pedicel stout, 5–17(22) mm ..... E. franciscanum
6' Distal leaves sessile; fruit 4-angled or ± flat parallel to septum; pedicels slender, (3)5–10 mm ..... E. suffrutescens
3' Proximal stems not woody; plant biennial or perennial herb
7. Basal leaves thread-like to narrowly linear, margins ± rolled under, appearing cylindric ..... E. teretifolium
7' Basal leaves various, flat, not thread-like or narrowly linear
8. Fr constricted between seeds; seeds 26–44; petals 3.5–6 mm wide ..... E. perenne
8' Fr not constricted between seeds; seeds (32)42–86; petals (5)6–16 mm wide
9. Pedicels 2–4(6) mm; seeds 1.5–3 mm wide, broadly ovate to ± round ..... E. concinnum
9' Pedicels 4–17(25) mm; seeds 0.7–2 mm wide, oblong
10. Fr erect or ascending (± spreading); petals orange or occasionally orange-yellow to yellow (lavender to ± purple); seeds winged only at tip or wing 0; widespread ..... E. capitatum
11. Seeds winged at tip, 2–4 mm, (0.8)1–2 mm wide; fruit flat parallel to septum (4-angled); petals generally orange, occasionally orange-yellow or yellow; adaxial hairs of basal, proximal cauline leaves generally 3(7)-rayed ..... var. capitatum
11' Seeds wingless, 1.5–2(2.4) mm, 0.7–1.2 mm wide; fruit 4-angled (flat parallel to septum); petals generally yellow (lavender to ± purple); adaxial hairs of basal, proximal cauline leaves generally 2(3)-rayed ..... var. purshii
10' Fr spreading; petals yellow; seeds winged all around; NCo, CCo
12. Basal leaves linear-oblanceolate, 2–9 mm wide; stem 0.4–9(13) dm; fruit valve midvein prominent; seeds 50–86 ..... E. ammophilum
12' Basal leaves spoon-shaped, 5–15 mm wide; stem 0.2–2.5(3.5) dm; fruit valve midvein obscure; seeds 32–74 ..... E. menziesii
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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