Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Chorizanthe

View taxon page for Chorizanthe

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

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

1. Involucre 3–5-toothed or -ribbed

2. Involucre teeth (4)5

3. Involucre  straight; flower glabrousstamens fused to perianth tube base – s SCoRI (Caliente Range), w DMoj ..... C. spinosa

3' Involucre awns hooked; flower hairy; stamens fused to perianth tube top

4. Involucre bell-shaped, tube 2–2.5 mm, abaxial  not longer, not wider than others; flower white to rose, 1.5–1.8(2) mm; c&n California ..... C. polygonoides var. polygonoides (2)

4' Involucre , tube 3–4.5 mm, abaxial tooth longer, wider than others; flower yellow, 1.5–2.5 mm; sw SnJV, n edge TR, GB, w DMoj ..... C. watsonii

2' Involucre teeth 3

5. Involucre cylindric, markedly transversely ridged; stamens 6 – D ..... C. corrugata

5' Involucre urn- to bell-shaped, not markedly transversely ridged; stamens 9

6. Plant  bell-shaped; abaxial tooth 1.8–2 mm,  hooked; s SCo ..... C. orcuttiana

6' Plant ; involucre ; abaxial tooth 5–10 mm, awn straight; SNE, D ..... C. rigida

1' Involucre 6–toothed or -ribbed

7. Involucre teeth with scarious margins

8. Involucre teeth scarious margins continuous across sinuses

9. Perianth  obcordate to 2-lobed – NCoRI, CaRF, SNF, e SnFrB ..... C. stellulata (2)

9' Perianth lobes 

10. Involucre hairy, 3–5 mm; flower 3.5–4(4.5) mm; SCoR ..... C. douglasii

10' Involucre  to ± glabrous, 3–4 mm; flower (1.5)2.5–3 mm; more widespread in CA-FP ..... C. membranacea

8' Involucre teeth scarious margins not continuous across sinuses

11. Involucre awns straight

12. Involucres 3–4 in small bracted clusters; perianth lobes alike – NCoRI, CaRF, SNF, e SnFrB ..... C. stellulata (2)

12' Involucres 1; perianth lobes not alike

13. Flower (3)3.5–4.5 mm, hairy generally throughout; plant generally  to ; c NCo ..... C. howellii

13' Flower (4)5–6 mm, hairy on lower 1/2; plant erect to spreading; n CCo ..... C. valida (2)

11' Involucre awns hooked

14. Flower glabrous; perianth lobes entire, tube yellow – CCo, w SnFrB, w SCoRO ..... C. diffusa

14' Flower hairy; perianth lobes 2-lobed, jagged, or short-pointed, tube white

15. Involucre tube 2.5–4 mm, thinly hairy; flower 2.5–4 mm ..... C. robusta

16. Involucre lobes rose-pink; plant erect; s SnFrB ..... var. hartwegii

16' Involucre lobes white; plant spreading or decumbent; n-c CCo, sw SnFrB ..... var. robusta

15' Involucre tube 1–2.5(3) mm, densely hairy; flower 2–3.5 mm

17' Perianth lobes minutely jagged

18. Involucre teeth margins ± pink; involucre tube 1.5–2(2.5) mm; flower 2–3 mm; stamens 3 or 6–9 ..... C. angustifolia (2)

18' Involucre teeth margins white (± pink) or dark ± pink to purple; involucre tube 2–2.5(3) mm; flower 2–3.5 mm; stamens 9 ..... C. pungens

19. Involucre teeth margins dark ± pink to purple; plant ±  to erect; 90–500 m ..... var. hartwegiana

19' Involucre teeth margins white (± pink); plant prostrate to ± ascending; 0–65 m ..... var. pungens

7' Involucre teeth without scarious margins (except Chorizanthe fimbriata, Chorizanthe procumbens)

20. Involucre teeth of unequal, not of equal or alternating, lengths, abaxial tooth >> others

21. Abaxial awn hooked ..... C. clevelandii

21' Abaxial awn straight

22. Outer perianth lobes entire or ± 2-lobed, inner jagged; stamens 9; SCoRO ..... C. rectispina

22' Outer perianth lobes with 1 or 3 teeth, inner entire; stamens 3; s SN, e CW, n WTR ..... C. uniaristata

20' Involucre teeth of equal or alternating lengths, abaxial tooth not >> others

23. Perianth lobes all or at least inner  or 2-lobed

24. Outer and inner perianth lobes fringed – SW, w DSon (San Felipe Valley) ..... C. fimbriata

25. Perianth lobes with terminal segment  to , wider than lateral; flower 6–7(8) mm ..... var. fimbriata

25' Perianth lobes with terminal segment linear, barely wider than lateral; flower 8–9(10) mm ..... var. laciniata

24' Outer and/or inner perianth lobes not fringed

26. Perianth lobes white to ± pink

27. Inner perianth lobes 2-lobed ..... C. blakleyi

27' Inner perianth lobes fringed ..... C. obovata

26' Perianth lobes red, rose, maroon, or dark purple

28. Outer perianth lobes entire; involucre tube 3.5–4 mm, awns 0.5–1 mm ..... C. palmeri

28' Outer perianth lobes 2-lobed or minutely jagged; involucre tube 4–6 mm, awns 0.5–2 mm

29. Outer perianth lobes minutely jagged or wavy-margined, inner fringed or ± 2-lobed; flower 4–4.5 mm; involucre tube 4–4.5 mm, swollen; SCoRI ..... C. ventricosa

29' Outer perianth lobes 2-lobed or notched, inner fringed; flower (4.5)5–6 mm; involucre tube 4–6 mm, ± swollen; SCoR ..... C. biloba

30. Outer perianth lobes deeply 2-lobed ..... var. biloba

30' Outer perianth lobes notched or ±  at tip ..... var. immemora

23' Perianth lobes entire, awned, or minutely jagged

31. Perianth lobes alike, outer and inner similar in width and length

32. Plant generally erect; branches breaking at ; stamens 3, fused to perianth tube top ..... C. brevicornu

33. Leaf blades 1–3(5) mm wide; involucres ribbed ..... var. brevicornu

33' Leaf blades 5–10 mm wide; involucres obscurely ribbed ..... var. spathulata

32' Plant prostrate to erect; branches not breaking at nodes; stamens 3–9 and fused to perianth tube base or (6)9 and fused to perianth tube top

34. Stamens fused to perianth tube top; perianth lobes entire or minutely notched; CA-FP ..... C. polygonoides

35. Involucre tube 1.5–2 mm, awns of prominent teeth 2–3 mm; PR ..... var. longispina

35' Involucre tube 2–2.5 mm, awns of prominent teeth 1.5–2 mm; NW, CaR, n SNF, ScV, CW ..... var. polygonoides (2)

34' Stamens fused to perianth tube base; perianth lobes entire, awned, or minutely jagged

36. Perianth lobes entire; stamens united basally – c&s SCo, s TR, w PR ..... C. procumbens

36' Perianth lobes awned or minutely jagged; stamens free

37. Plants sparsely hairy, yellow-green; flowers 1.5–2 mm, sparsely hairy abaxially – c CCo (Fort Ord, nw Monterey Co.) ..... C. minutiflora

37' Plants densely hairy, tannish to reddish or grayish; flowers 2–3.5 mm, hairy abaxially

38. Perianth lobes minutely jagged; s CCo, n SCo (San Luis Obispo, Santa Barbara cos.) ..... C. angustifolia (2)

38' Perianth lobes awned; n CCo, SnFrB (San Francisco Peninsula)

39. Involucre awns hooked, teeth with or without scarious margins; n CCo, SnFrB ..... C. cuspidata var. cuspidata (2)

39' Involucre awns straight, teeth without scarious margins; n CCo ..... C. cuspidata var. villosa

31' Perianth lobes not alike, inner narrower and shorter

40. Involucre awns straight

41. Involucre tube 1.5–2 mm; WTR ..... C. parryi var. fernandina

41' Involucre tube 3–4(4.5) mm; n CCo ..... C. valida (2)

40' Involucre awns hooked

42. Involucre tube 1.5–2 mm – TR ..... C. parryi var. parryi

42' Involucre tube 2.5–6 mm

43. Proximal leaf-like bracts of stem early-deciduous or 0

44. Flower 4.5–6 mm; e PR ..... C. leptotheca

44' Flower 3–4(5) mm; c&s CCo, SCoRO, SW (except e PR) ..... C. staticoides

43' Proximal leaf-like bracts of stem persistent

45. Flower 4.5–6 mm, long  from involucre ..... C. xanti

46. Involucre densely hairy; e SnBr, n SnJt ..... var. leucotheca

46' Involucre thinly hairy; s SN, Teh, s SCoRI, n&e TR (except e SnBr), SNE ..... var. xanti

45' Flower 2.5–3.5 mm, ± exserted from involucre

47. Flower 3–3.5 mm; involucre tube 2.5–3 mm; stamens 9; SCoRO ..... C. breweri

47' Flower 2.5–3 mm; involucre tube 2–2.5 mm; stamens 6; n ChI ..... C. wheeleri



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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