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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.


A. lentiginosus Douglas FRECKLED MILKVETCH
Perennial herb, sometimes flowering 1st year or annual, ± leafy; ± glabrous to silvery-strigose. Leaf: 1–15 cm; leaflets generally 11–27(29), linear to widely ± ovate. Inflorescence: flowers 3– ± 50, ascending or spreading. Flower: petals ± purple, cream, ± white, or mixed ± purple and ± white, keel 0.65–0.8 × banner, banner recurved 30–50°. Fruit: variable but generally ovate or spheric, widely grooved above and below, generally ± bladdery, ± papery, deciduous; stalk-like base 0; beak generally triangular, flat; chambers 2 below beak.
2n=22. Highly variable; varieties often distinct, yet intermediates are common; flower, fruit both needed for identification. [Online Interchange]

Key to Astragalus lentiginosus

1. Leaflets 3–5, linear-oblanceolate ..... var. piscinensis

1' Leaflets generally >= 7, often wider than linear-oblanceolate

2. Calyx generally > 6.5 mm; keel 8.4–15 mm;

3. Plants of California Floristic Province

4. Inflorescence 7–20-flowered, 1–4 cm in fruit; petals pink-purple; herbage hairs subappressed ..... var. idriensis

4' Inflorescence 10–32-flowered, 4–15 cm in fruit; petals purple, ± yellow, or white; herbage hairs ± spreading or ± appressed

5. Petals cream to ± yellow; herbage hairs ± spreading ..... var. nigricalycis

5' Petals purple (white); herbage hairs ± appressed ..... var. variabilis (4)

3' Plants of Great Basin Floristic Province, D

6. Petals ± white, pink-tinged; Modoc Plateau ..... var. chartaceus

6' Petals generally purple or ± pink; East of Sierra Nevada (Inyo Co.), D

7. Herbage sparsely hairy, ± green, or if densely hairy then generally either fruit sparsely hairy or calyx lobes < 1.4 mm

8. Stem prostrate, > 60 cm; moist alkaline flats, extreme n Mojave Desert ..... var. sesquimetralis

8' Stem ascending or spreading, < 50 cm; generally sand, widespread ..... var. variabilis (4)

7' Herbage hairs dense, silvery, ± gray, or ± white, fruit densely hairy, calyx lobes > 1.4 mm

9. Fruit ± swollen, < 7 mm wide, upper suture concave in side view; e Mojave Desert, s Sonoran Desert ..... var. borreganus

9' Fruit swollen, often bladdery, > 8 mm wide, upper suture convex in side view; n Mojave Desert, nw Sonoran Desert

10. Plant base not woody; Sonoran Desert (Coachella Valley) ..... var. coachellae

10' Plant base ± woody; n Mojave Desert (Eureka Valley) ..... var. micans

2' Calyx generally < 6.5 mm; keel 5.5–10 mm (8.4–12.3 mm in Astragalus lentiginosus var. variabilis)

11. Leaflet densely hairy, ashy-gray or silvery, at least on 1 side

12. Fruit beak curved down, away from stem; clayey, alkaline flats, seeps; East of Sierra Nevada, w Mojave Desert ..... var. albifolius

12' Fruit beak straight or curved up, toward stem; various habitats, generally except clayey, alkaline flats, seeps; Mojave Desert, California Floristic Province

13. Fruit cluster < 4 cm; dry slopes in open pine forest; San Gabriel Mountains ..... var. antonius

13' Fruit cluster > 4 cm; gravel or sand on flats, washes, valleys with creosote, sagebrush, pinyon/juniper; Mojave Desert, s California Floristic Province

14. Keel 5.6–8.5 mm; fruit hairs 0 to sparse; generally e Mojave Desert ..... var. fremontii (2)

14' Keel > (8)8.5 mm; fruit hairs sparse to dense; generally w Mojave Desert ..... var. variabilis (4)

11' Leaflet sparsely hairy or ± glabrous, green (sometimes densely hairy, ± gray in Astragalus lentiginosus var. ineptus)

15. Plants of Modoc Plateau, n East of Sierra Nevada (from c Mono Co.), ± ne California Floristic Province

16. Fruit stiff-papery, ± opaque, minutely hairy at least in youth, often little inflated, not bladdery, strongly incurved ..... var. lentiginosus

16' Fruit thinly papery, translucent, ± glabrous, bladdery, ± straight

17. Fruit cluster dense; stem generally with several to many branches in lower 1/2, generally > 25 cm ..... var. floribundus

17' Fruit cluster ± open; stem generally with 0–few branches in lower 1/2, generally < 30 cm ..... var. salinus

15' Plants of s California Floristic Province, East of Sierra Nevada, D

18. Petals generally bright pink-purple; fruit 12–36 mm

19. Keel generally < 8.5 mm ..... var. fremontii (2)

19' Keel generally > 8.5 mm ..... var. variabilis (4)

18' Petals generally ± white, sometimes pink-tinged; fruit 6–22 mm

20. Fruit beak ± cylindric, slender; calyx lobes generally < 1.2 mm, acute, slender — s High Sierra Nevada ..... var. kernensis

20' Fruit beak flat, ± triangular; calyx lobes often > 1.2 mm, acute, slender (if < 1.2 mm, then blunt, triangular)

21. Calyx lobes < 1.2 mm, blunt, triangular; Transverse Ranges ..... var. sierrae

21' Calyx lobes > 1.2 mm, acute, slender; High Sierra Nevada, East of Sierra Nevada

22. Leaf 1.5–5.5 cm, leaflets 9–21, crowded; High Sierra Nevada, East of Sierra Nevada ..... var. ineptus

22' Leaf 4–9 cm, leaflets 13–27, ± spaced; White and Inyo Mountains ..... var. semotus


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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