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Vascular Plants of California
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Key to Lepidium

View taxon page for Lepidium

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

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

1. Middle or distal cauline  bases lobed to  or clasping

2. Most distal cauline leaves deeply cordate-clasping;  leaves 2–3-pinnately lobed or divided; flowers pale yellow; seeds narrowly winged ..... L. perfoliatum

2' Most distal cauline  bases lobed or  leaves  (divided or 1–2-pinnately lobed); petals white; seeds wingless

3. Stamens 2; petals 0 or to 0.7 mm;  leaves 1–2-pinnately lobed; style to 0.1 mm ..... L. oblongum (2)

3' Stamens 6; petals 1.5–5 mm;  leaves  or  (divided); style >= 0.2 mm

4. Plants not rhizomatous; fruit , tip wide-winged, notched; inflorescence elongated

5. Annualfruit valves style 0.2–0.5(0.7) mm,  or ±  beyond notch ..... L. campestre

5' Perennial herbfruit valves generally not style (0.6)1–1.5 mm, well-exserted beyond notch ..... L. heterophyllum

4' Plants rhizomatous; fruit , tip wingless, not notched; inflorescence generally 

6. Fruit flat,  to ± valves net-veined ..... L. draba

6' Fruit inflated, spheric to obovoid, generally not net-veined

7. Fruit hairy, spheric, (2)3–4.4(5) mm wide; style 0.5–1.5 mm ..... L. appelianum

7' Fruit glabrous, obovoid, (3.5)4–6.2(7) mm wide; style (0.8)1.2–2(2.3) mm ..... L. chalepense

1' All cauline  bases not lobed, , or clasping

8. Fruit  walls thick, ridged or tubercled

9. Fruit  to ovate-cordate, 2.3–3.4 mm, ridged, tip not notched; stamens 6 ..... L. coronopus

9' Fruit spectacle-shaped, 1.3–1.7 mm, not ridged, tip notched; stamens 2 ..... L. didymum

8' Fruit  walls thin or thick, not ridged or tubercled

10. Biennial to subshrub, with woody  or base

11. Basal leaves  or  ..... L. latifolium

11' Basal leaves pinnately lobed or 0

12. Plant glabrous leaves 0; fruit 4.2–7(8) mm wide ..... L. fremontii

12' Plant  at least on  or  leaves generally present; fruit (1.5)1.8–3.6(4) mm wide ..... L. montanum (2)

10' Annual or biennial, not woody

13. Stamens 2

14. Fruit prominently net-veined; sepals persistent ..... L. strictum

14' Fruit not veined (weakly veined); sepals deciduous

15. Pedicel strongly flattened; fruit valves stiff hairy or bristly at least on margin ..... L. lasiocarpum subsp. lasiocarpum

15' Pedicel  or ± flattened; fruit valves glabrous or 

16. Fruit  ..... L. ramosissimum

16' Fruit round to obovate

17. Plant stiff hairy; mid-cauline leaves pinnately lobed ..... L. oblongum (2)

17' Plant  or glabrous; mid-cauline leaves  to , lobed, or divided

18. Fruit obovate;  hairs 0 or straight, generally club-shaped; petals 0 or 0.3–0.9 mm ..... L. densiflorum

18' Fruit ± round;  hairs curved; petals 1–2.5 mm ..... L. virginicum

19. Fruit glabrous or  flattened at least below tip, (0.2)0.3–0.4 mm wide ..... subsp. menziesii

19' Fruit glabrous , 0.15–0.2 mm wide ..... subsp. virginicum

13' Stamens 4 or 6

20. Stamens 6; style (0.1)0.2–1.6 mm, generally  from fruit notch

21. Flowers yellow

22. Pedicel glabrous, (2.7)3–4.4(5) mm; inflorescence  glabrous; fruit tip winged; notch 0.2–0.6 mm ..... L. flavum

22' Pedicel hairy adaxially, 5–15 mm; inflorescence  hairy or glabrousfruit tip wingless, notch 0 (0.1 mm) ..... L. jaredii

21' Flowers white

23. Biennial or  herb hairs straight or curved ..... L. montanum (2)

23' Annual hairs long, straight, mixed with shorter club-shaped ..... L. thurberi

20' Stamens 4; style 0 (0.1 mm),  in fruit notch

24. Pedicel  or ± flattened

25. Fruit 2.4–3.6 mm, tip winged, notch 0.3–0.8 mm; petals 0 ..... L. oxycarpum

25' Fruit 1.8–2 mm, tip wingless, notch to 0.1 mm; petals 0.4–0.6 mm ..... L. pinnatifidum

24' Pedicel strongly flattened

26. Sepals persistentfruit  hairs stiff, , mixed with much smaller hairs; petals hairy abaxially ..... L. latipes

26' Sepals not persistentfruit valves glabrous or sparsely uniformly petals 0 or glabrous abaxially

27. Fruit valves not or obscurely veined;  not  ..... L. nitidum

27' Fruit valves strongly net-veined;  

28. Fruit (3)4–6 mm, 2.5–3.5 mm wide, notch (0.8)1–2 mm, V-shaped;  (2)3–4.2 mm ..... L. acutidens

28' Fruit 2.5–3.5 mm, 2–2.8 mm wide, notch 0.5–0.7(0.8) mm, U-shaped;  (1.6)1.9–2.5(3) mm ..... L. dictyotum

 

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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, http://ucjeps.berkeley.edu/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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