Jepson eFlora: Key page
Vascular Plants of California
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Key to Erysimum

View taxon page for Erysimum

(For a list of species in Erysimum, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Petals 3–9(12) mm, 1.5–3 mm wide

2. Fruit valves densely hairy inside; sepals 1.8–3.2 mm; petal claw 1.5–3.5 mm ..... E. cheiranthoides

2' Fruit 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. Fruit hairs 2-rayed; stigma  2, prominent, longer than wide; petals orange to yellow, brown, red, purple, violet, or white ..... E. cheiri

4' Fruit hairs 2–4-rayed; stigma lobes obscure, as long as wide; petals yellow or cream

5. Fruit flat perpendicular to septum hairs 2(3)-rayed ..... E. insulare

5' Fruit flat parallel to septum or 4-angled; leaf hairs 2–5-rayed

6. Distal leaves petioled; fruit flat parallel to septum;  stout, 5–17(22) mm ..... E. franciscanum

6' Distal leaves ; fruit 4-angled or ± flat parallel to septum;  slender, (3)5–10 mm ..... E. suffrutescens

3' Proximal stems not woody; plant biennial or  herb

7. Basal leaves thread-like to narrowly margins ± rolled under, appearing  ..... E. teretifolium

7' Basal leaves various, flat, not thread-like or narrowly linear

8. Fruit constricted between seeds; seeds 26–44; petals 3.5–6 mm wide ..... E. perenne

8' Fruit 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  to ± round ..... E. concinnum

9' Pedicels 4–17(25) mm; seeds 0.7–2 mm wide, 

10. Fruit  or  (± spreading); petals orange or occasionally orange-yellow to yellow (lavender to ± purple); seeds winged only at tip or  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 , 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' Fruit ; petals yellow; seeds winged all around; NCo, CCo

12. Basal leaves linear-oblanceolate, 2–9 mm wide; stem 0.4–9(13) dm; fruit  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.) . Jepson eFlora, [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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