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Vascular Plants of California
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Key to Acmispon

View taxon page for Acmispon

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

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

1. Fruit , generally flat, generally ± entirely  from calyx body, straight or ± curved, generally with straight or curved, 0.5–1.5 mm beakannual herb

2. Perennial herb (except Acmispon strigosus); fruit straight or ± curved; wings generally > keelstigma ± glabrous or finely hairy

3. Annual, generally , mat-forming; inflorescence generally 1–2-flowered; corolla 5–10 mm;  axis flat, ± blade-like; fruit generally curved near tip ..... A. strigosus (2)

3' Perennial herb or shrub-like,  (mat-forming or not) to inflorescence 1–9-flowered; corolla 7–25 mm;  axis not flat or blade-like; fruit generally straight (or curved throughout, rarely only at or near tip)

4. Leaf axis including  10–35 mm; leaflets 7–9, 1–2.2 cm, length 1.5–3 × width ..... A. grandiflorus

5. Plant  or soft-hairy; leaflets generally 1–1.5 cm ..... var. grandiflorus

5' Plant ± glabrous, finely , or leaflets generally 1.6–2.2 cm ..... var. macranthus

4' Leaf axis including  1–8 mm; leaflets 3–5, < 1 cm and/or length > 3 × width

6. Shrub-like, , (2)5–15 dm, finely corolla 12–24 mm ..... A. rigidus

6' Perennial herb or low-ascending, 1–3 dm, silvery-silky or gray-puberulent; corolla 6–12 mm ..... A. argyraeus

7. Stem generally , mat-forming; calyx  ± 2 mm; SnBr, SnJt, DMtns ..... var. argyraeus

7' Stem  to low-ascending; calyx  2–3 mm; DMtns

8. Leaflet oblanceolate to obovate, length ± 3–4 × width; New York Mtns ..... var. multicaulis

8' Leaflet obovate, length ± 2 × width; Providence Mtns ..... var. notitius

2' Annualfruit generally straight; wings generally ± <= keelstigma glabrous or 

9. Flowers generally 1 per   << 1 cm, bracts 0

10. Corolla white, pale yellow, or pink, often darkening in age; plant generally  to  and calyx  < 2 × tube, or rarely  and calyx lobes generally > 2 × tube

11. Plant generally 1–4 dm; calyx  ± 1.5 × tube ..... A. denticulatus

11' Plant < 1 dm; calyx  ± 2 × tube ..... A. rubriflorus

10' Corolla yellow, reddening in age; plant  to low-ascending; calyx  0.8–2 × tube

12. Calyx  1–2 × tubefruit generally 3–4 mm wide; plant generally with soft,  hairs ..... A. brachycarpus

12' Calyx  ± 0.8–1.2 × tubefruit generally 2.3–3 mm wide; plant ±  or hairs soft,  ..... A. wrangelianus

9' Flowers 1–several per   generally > 1 cm, generally bracted

13. Inflorescence generally 2–4-flowered (1st-formed often 1–2-flowered); leaflets 3–7, obovate to ± round, terminal generally largest ..... A. maritimus

14. Corolla 3.5–5 mm, keel > other petalsfruit 1–1.5 cm, becoming narrowed between seeds ..... var. brevivexillus

14' Corolla 6–10 mm, keel ± = other petalsfruit 1.5–3 cm, not narrowed between seeds ..... var. maritimus

13' Inflorescence generally 1-flowered; leaflets 1–9,  to obovate, ± equal

15. Calyx  >> tubeleaflets generally 3 (upper leaves often simple) ..... A. americanus var. americanus

15' Calyx  ± <= tubeleaflets 3–9

16. Stem  to  axis sometimes ± flat; corolla pink or salmon, quickly fading; fruit straight, margin often wavy ..... A. parviflorus

16' Stem , often mat-forming;  axis flat; corolla yellow; fruit generally curved near tip, margin not wavy ..... A. strigosus (2)

1' Fruit , generally not flat, generally  or ±  (sometimes exserted) from calyx body, curved most of length, generally with curved, 2–3 mm beak; generally  herb

17. Annual herb, or ; young growth ± not hairy; corolla 3–7 mm; fruit ; SCoR, SW, generally s of Los Angeles

18. Inflorescence ± ; s SCoR, SW ..... A. micranthus

18' Inflorescence peduncled; s SCo (San Diego Co.) ..... A. prostratus

17' Perennial herbshrub to ; young growth hairy if plant blooming 1st year or flowers < 7 mm; fruit  or ; widespread, including SW

19. Perennial herbshrub; ChI

20. Calyx shaggy-hairy; fruit  (except slowly elongating beak);  generally silvery-silky with fine, straight, ultimately wavy or tangled hairs ..... A. argophyllus (2)

21. Inflorescence peduncled, not crowded; calyx  1.5–2.5 mm; stem  to  ..... var. argenteus

21' Inflorescence ± , crowded at stem tip; calyx  2.5–5 mm; stem  to 

22. Stem generally leaves overlapping; calyx  ± 2.5–4 mm; s ChI (San Clemente Island) ..... var. adsurgens

22' Stem generally leaves not overlapping; calyx  2.5–5 mm; n ChI (Santa Cruz Island) ..... var. niveus

20' Calyx ± glabrous or fruit soon-exserted;  green or gray, sparsely or densely strigose or silky ..... A. dendroideus

23. Leaflets 3, densely  or ± silky, generally gray; n ChI (San Miguel Island) ..... var. veatchii

23' Leaflets 3–5, finely or sparsely , green; ChI (except San Miguel Island)

24. Fruit 1–1.5 cm;   0; ChI (except San Miguel, San Clemente Islands) ..... var. dendroideus

24' Fruit 2.5–5 cm;   generally pres; s ChI (San Clemente Island) ..... var. traskiae

19' Perennial herb (except Acmispon glaber); mainland

25. Leaflets 3; inflorescence 1–3-flowered, ± 

26. Leaflet 2–5 mm; fruit 6–9 mm; uncommon, se PR, sw DSon ..... A. haydonii

26' Leaflet 4–15 mm; fruit 10–15 mm; widespread, including PR

27. Calyx glabrous (see couplet 31 for varieties) ..... A. glaber (2)

27' Calyx  ..... A. procumbens

28. Corolla 9–12 mm; calyx 4–6 mm,  ± = tube; s SN ..... var. jepsonii

28' Corolla 6–8 mm; calyx 2–3 mm,  << tube; not s SN ..... var. procumbens

25' Leaflets >= 3; inflorescence 2–15-flowered,  or peduncled

29. Leaflet glabrous or finely , generally green; hairs straight or ± wavy

30. Plants generally  to  (some on immediate coast prostrate), bushy-branched, 5–20 dm; stem sparsely leafy; corolla yellow; calyx  generally 1–2 mm, not curved outward; coastal and inland ..... A. glaber (2)

31. Keel prominent, > wingscorolla generally 8–9 mm; generally inland, SW, DSon ..... var. brevialatus

31' Keel not prominent, ± = wingscorolla 7–12 mm; coastal and inland, NCo, NCoR, n SNF, CCo, SnFrB, SCo, WTR, PR ..... var. glaber

30' Plants  or low-ascending, < 10 dm; stem leafy; corolla pink-white or yellow; calyx  generally < 1 mm or curved outward; especially coastal

32. Calyx  narrow, some or all curved outward or hooked; corolla generally white to ± pink (to brick-red when dry) ..... A. cytisoides

32' Calyx  wide, straight, not hooked; corolla yellow ..... A. junceus

33. Peduncles 8–25 mm; stem often wiry, generally fruit well  ..... var. biolettii

33' Peduncles 1–5 mm; stem generally stout to fruit ±  ..... var. junceus

29' Leaflet hairy, green, gray, or silvery; hairs straight or wavy

34. Stem, especially near tip, generally with  or obliquely directed, often straight, stiff hairs < 0.5 mm; corolla 4–6 mm; coastal and inland ..... A. heermannii

35. Corolla generally 4–5 mm; ovary generally finely ; SCo, SnBr, PR, DSon ..... var. heermannii

35' Corolla generally 5–6 mm; ovary generally soft spreading-hairy; NCo, NCoRO, CCo, SCoRO ..... var. orbicularis

34' Stem generally  or with ± , often wavy hairs 0.2–0.4 mm; corolla 5–12 mm; especially inland

36. Fruit  hairs generally wavy, not obscuring surface; leaves gray or green ..... A. nevadensis

37. Flowers generally 3–5 per inflorescencecalyx 6–7 mm, appearing blocky; banner abruptly upcurved 90° TR, ne PR ..... var. davidsonii

37' Flowers generally 5–12 per inflorescencecalyx 5–10 mm, not appearing blocky; banner upcurved 30–90° KR, NCoR, CaR, SN, CCo, SCo, w PR, DMtns ..... var. nevadensis

36' Fruit  or ±  hairs generally straight, tangled in age, generally obscuring surface; leaves silky-silvery ..... A. argophyllus (2)

38. Inflorescence generally < 1 cm wide, 4–8-flowered; corolla 6–10 mm; especially c SN and s ..... var. argophyllus

38' Inflorescence often ± 1.5 cm wide, 10–15-flowered; corolla 8–12 mm; n SN ..... var. fremontii

 

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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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