Jepson eFlora
Key to families | Table of families and genera

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 lobes 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; leaf 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; 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. 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 ovate to ± round ..... E. concinnum

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

10. Fruit 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' Fruit spreading; petals yellow; seeds winged all around; North Coast, Central Coast

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, [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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