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

Key to Lomatium

View taxon page for Lomatium

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

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

1. Marginal fruit wings very corky, incurved; fruit axis a corky ridge along middle of each fruit ..... L. fusiformis

1' Marginal fruit wings thin or corky, not incurved; fruit axis divided to base

2. At base and tip fruit evidently notched and wings narrower; leaflets or segments generally large

3. Leaflets coarsely  or some 3-lobed but not pinnately so

4. Leaf 1–2-ternate; fruit wings thickened, >> body in width; s California ..... L. lucidum

4' Leaf ternate-pinnate or 1–2-pinnate; fruit wings thin, ± >= body in width; n CA

5. Plant < 8 dm; fruit wide-elliptic to round; KR ..... L. howellii

5' Plant < 5 dm; fruit wide-oblong; NCoR ..... L. repostum

3' Leaflets pinnately lobed, generally also toothed or irregularly cut

6. Leaf ; fruit 15–18 mm – s ChI ..... L. insulare

6' Leaf blade < to ± = petiole; fruit 6–14 mm

7. Leaflet spines weak; fruit wings >= body in width; CCo, SCoR ..... L. parvifolium

7' Leaflet spines strong; fruit wings < body in width; SNH, SNE

8. Mature rays 25–50 mm; fertile  5–10 mm ..... L. rigidum

8' Mature rays 1–11 mm; fertile pedicels 0.1–1 mm ..... L. shevockii

2' At base and tip fruit not evidently notched and wings not narrower; leaflets or segments small to large

9. Plant from a definite, spheric to elongate or irregularly thickened, generally ± shallow tuber

10. Plant  to hairy

11. Bractlets not scarious, ± fused, reflexing ..... L. macrocarpum (3)

11' Bractlets ± scarious, free to fused, not reflexing ..... L. nevadense (5)

10' Plant glabrous to ± scabrous but not hairy

12. Plant short-stemmed, from an elongate, generally  tuber; rays ± ; fruit linear-oblong ..... L. bicolor var. leptocarpum (3)

12' Plant stem 0, from a ± spheric to ovoid tuber; rays ± ; fruit  to 

13. Pedicel 5–16 mm; bractlet ± = flower; tuber < 4 cm wide ..... L. canbyi

13' Pedicel 0–6 mm; bractlet 0 or < flower; tuber <= 2.5 cm wide

14. Leaves ternate-1–2-pinnate; rays 1–12 mm, n&c SNH ..... L. stebbinsii

14' Leaves 2–3-ternate; rays 10–60 mm; KR, CaRH, SNH, MP

15. Corolla yellow; ultimate  segments  or minutely mucronate ..... L. roseanum

15' Corolla white; ultimate leaf segments 

16. Rays 2–5, 10–20 mm; pedicels 3–4 mm; fruit ± 5 mm, ± 4 mm wide ..... L. hendersonii

16' Rays 3–20, 10–60 mm; pedicels 0.5–2.5 mm; fruit 5–9 mm, 3–4 mm wide ..... L. piperi

9' Plant from a generally elongated, deep taproot (rarely with a deep-seated tuber at tip)

17. Leaf dissected or compound, segments or leaflets generally few, generally large, generally wide

18. Peduncle distally swollen, inflated ..... L. nudicaule

18' Peduncle distally not swollen, not inflated – rays occasionally webbed at base into prominent disk

19. Stem 0 or short; leaves 0–few. 1–3-pinnate

20. Plant base not calyx 0 ..... L. martindalei (2)

20' Plant base fibrous; calyx prominent ..... L. parryi

19' Stem prominently leafy; leaf 1–2-ternate-pinnate

21. Herbage glaucous; leaflets wedge-shaped to obovate, 10–50 mm wide ..... L. californicum

21' Herbage green to ± gray, not conspicuously glaucous; leaflets  to lance-ovate, 0.5–10 mm wide ..... L. triternatum

22. Ovary, generally fruit densely puberulent ..... var. macrocarpum

22' Ovary, fruit glabrous ..... var. triternatum

17' Leaf dissected, segments generally many, small, occasionally long but then narrow (see also Lomatium parryi)

23. Ovary puberulent to scabrous or hairy, fruit hairy (glabrous in age)

24. Plants generally with definite stem – stem leaves >= 1

25. Petals  ..... L. dasycarpum

26. Leaf segments linear; pedicels generally > fruit ..... subsp. dasycarpum

26' Leaf segments thread-like; pedicels generally < fruit ..... subsp. tomentosum

25' Petals ± glabrous, not tomentose

27. Involucel 1-sided, reflexing, not scarious ..... L. macrocarpum (3)

27' Involucel not 1-sided, not reflexing, generally ± scarious

28. Corolla white to cream; cauline leaf sheaths inconspicuous ..... L. nevadense (5)

28' Corolla yellow; cauline leaf sheaths swollen

29. Herbage densely puberulent to glabrous; ovaries puberulent; bractlets generally obovate to oblanceolate, generally overlapping ..... L. utriculatum (2)

29' Herbage, ovaries generally scabrous; bractlets generally  to oblanceolate, not overlapping ..... L. vaginatum (2)

24' Stem 0

30. Corolla white to cream, occasionally purple-tinged; anthers generally purple

31. Bractlets ± glabrous; leaf segments linear to oblong ..... L. nevadense (5)

32. Ovary and generally fruit densely fine-hairy ..... var. nevadense

32' Ovary and fruit glabrous to ± scabrous ..... var. parishii

31' Bractlets glabrous to hairy; leaf segments linear to oblanceolate ..... L. ravenii

33. Ultimate leaf segments  to obovate; bractlets minutely hairy; leaf bases rarely persistent ..... var. paiutense

33' Ultimate leaf segments linear to linear-oblong; bractlets glabrous or nearly so; leaf bases generally persistent ..... var. ravenii

30' Corolla yellow or purple; anthers generally yellow

34. Petiole > leaf blade; corolla generally purple (yellow); fruit wings >= body in width ..... L. mohavense

34' Petiole < leaf blade; corolla yellow (± purple); fruit wings generally 1/2 body in width ..... L. foeniculaceum

35. Petal margin minutely  ..... subsp. fimbriatum

35' Petal margin glabrous

36. Rays generally 1, < 1.5 cm; subalpine scrub ..... subsp. inyoense

36' Rays generally 2–17, < 6 cm; sagebrush scrub, pine woodland ..... subsp. macdougalii

23' Ovary, fruit glabrous, occasionally scabrous

37. Plant generally with a definite stem, stem leaves generally >= 2

38. Stem base with 1 or more scarious, bladeless sheaths; fruit oblong-ovate to elliptic, wings thick, << body in width

39. Fruit ± ; fertile pedicels generally 1–3 mm, < sterile ..... L. dissectum

39' Fruit distinctly pedicelled; fertile pedicels generally 5–15 mm, > sterile ..... L. multifidum

38' Stem base without conspicuous bladeless sheaths; fruit wings thin, < to > body in width

40. Corolla white, cream or ± purple

41. Plant glabrous to ± scabrous; bractlets 0–few, inconspicuous ..... L. martindalei (2)

41' Plant densely puberulent to tomentose; bractlets generally conspicuous, occasionally fused into a 

42. Involucel 1-sided, reflexing, not scarious ..... L. macrocarpum (3)

42' Involucel generally , spreading, scarious ..... L. nevadense (5)

40' Corolla yellow, occasionally white in age

43. Leaves generally not crowded at stem base; fruit wings >= body in width

44. Herbage puberulent to glabrous; ovaries generally puberulent – fruit generally glabrous ..... L. utriculatum (2)

44' Herbage, generally ovaries minutely scabrous ..... L. vaginatum (2)

43' Leaves crowded at stem base; fruit wings < body in width

45. Fruit linear-oblong; leaf segments linear, 10–30 mm, not crowded ..... L. bicolor var. leptocarpum (3)

45' Fruit oblong to ovate; leaf segments linear to oblong, 2–7 mm, crowded

46. Leaf ± gray, dull, petiole ± sheathing throughout; bractlets fused at base into 1-sided scarious cup; CaRH, n SNH, GB ..... L. austiniae

46' Leaf green, shiny, petiole sheathing to ± middle; bractlets free, inconspicuous; KR ..... L. hallii

37' Plant stem ± 0, cauline leaves 0, occasionally 1 or more at base of short stem

47. Fruit linear-oblong to oblong; CaRH, SNH, MP

48. Plant base fibrous; bractlets 0; fruit wings narrow, < 1/2 body; SNH ..... L. torreyi

48' Plant base not fibrous; bractlets several, linear; fruit wings narrow to broad, < or > 1/2 body; CaRH, MP

49. Fruit narrowly oblong, 10–12 mm, 2–5 mm wide, wings narrow, < 1/2 body; CaRH, MP ..... L. bicolor var. leptocarpum (3)

49' Fruit oblong, 8–16 mm, 5–9 mm wide, wings broad, > 1/2 body; MP ..... L. grayi

47' Fruit elliptic, broadly oblong, or ovate to ± round; NW, CaR, n&c SNF, n SNH, ScV, SnFrB, GB

50. Leaf segments thread-like to linear, long, not crowded; herbage green, generally shiny

51. Bractlets generally > 5, lanceolate to obovate, scarious, occasionally 0; pedicels stout – generally < fruit ..... L. caruifolium

52. Bractlets wide; fruit wings ± thin, wide ..... var. caruifolium

52' Bractlets narrow, occasionally 0; fruit wings thick, narrow ..... var. denticulatum

51' Bractlets 0–5, thread-like to lance-linear, ± scarious-margined; pedicels slender ..... L. marginatum

53. Corolla yellow; KR, CaRF, NCoRI, n&c SNF, n SNH, ScV ..... var. marginatum

53' Corolla ± red-purple; NCoR ..... var. purpureum

50' Leaf segments lanceolate or oblong to ovate (linear to thread-like), short, generally crowded; herbage generally glaucous or ± gray

54. Herbage clearly puberulent to tomentose

55. Leaf 2–3-pinnately dissected or compound; petiole sheathing in proximal 1/2; corolla white; GB ..... L. nevadense (5)

55' Leaf ternate-pinnately dissected; petiole sheathing throughout; corolla yellow or purple; coast ranges

56. Corolla purple; bractlets scarious ± throughout ..... L. hooveri

56' Corolla generally yellow; bractlets narrowly scarious-margined

57. Ultimate leaf sections overlapping, broad, obtuse; fruit ± elliptic, wings thick; serpentine substrates, NCoRH, NCoRI ..... L. ciliolatum

57' Ultimate leaf sections less crowded, narrow, generally acute; fruit ovoid, wings thin; volcanic substrate, SnFrB ..... L. observatorium

54' Herbage glabrous to minutely scabrous or sparsely puberulent

58. Pedicels < fruit; bractlets present

59. Leaf blade obovate,  sheaths straw-colored; volcanic soils ..... L. peckianum

59' Leaf blade oblong to ovate, basal sheaths ± purple; serpentine substrates ..... L. tracyi

58' Pedicels generally > fruit; bractlets ± 0 (vestigial)

60. Corolla white to purple; plant base not fibrous; KR ..... L. engelmannii

60' Corolla yellow; plant base fibrous or not; c NCoRO (Little Red Mtn, Red Mtn), c SNF

61. Rays 6–18; oil glands 1–4 per rib-interval; c SNF ..... L. congdonii

61' Rays 4–7; oil glands 4–6 per rib-interval; c NCoRO (Little Red Mtn, Red Mtn) ..... L. kogholiini

 

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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]

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