Jepson eFlora
Key to families | Table of families and genera

Key to Lasthenia

View taxon page for Lasthenia

1. Phyllaries ± fused

2. Phyllaries fused < 1/2; leaves entire to pinnately lobed ..... L. conjugens

2' Phyllaries fused > 2/3; leaves entire

3. Pappus present ..... L. glaberrima

3' Pappus 0

4. Fruit strongly flattened, margin fringed with blunt hairs ..... L. chrysantha

4' Fruit not strongly flattened, glabrous or face papillate or hairy

5. Fruit hairs short, curved ..... L. ferrisiae

5' Fruit glabrous or papillate ..... L. glabrata

6. Fruit papillate ..... subsp. coulteri

6' Fruit glabrous ..... subsp. glabrata

1' Phyllaries free

7. Receptacle narrowly conic; phyllaries generally 4–6

8. Ray <= 1 mm; involucre cylindric to narrowly obconic; disk corolla generally 4-lobed ..... L. microglossa

8' Ray > 2 mm; involucre obconic or bell-shaped; disk corolla generally 5-lobed

9. Stem coarse, hairy; anther tip triangular ..... L. debilis

9' Stem fine, wiry, glabrous proximally; anther tip awl-shaped ..... L. leptalea

7' Receptacle conic or hemispheric; phyllaries generally > 6

10. All leaves ± entire or with 3–5+ teeth; corolla dark red in alkali solution

11. Perennial herb (annual); coastal

12. Stem erect, 0–few-branched; root fleshy; leaf generally < 2 mm wide ..... L. californica subsp. bakeri

12' Stem ± decumbent, generally branched; root fibrous; leaf generally > 2 mm wide ..... L. californica subsp. macrantha

11' Annual; coastal or inland

13. Pappus of 1–7 clear, brown, linear to awl-like scales or 0 ..... L. californica subsp. californica

13' Pappus of (2)4(6) opaque, white, lance-ovate scales or 0 ..... L. gracilis

10' Mid-cauline leaves generally pinnately lobed; corolla yellow in alkali solution

14. Involucre obconic; phyllaries persistent; pappus of lanceolate to ovate scales tapered to tip ..... L. platycarpha

14' Involucre hemispheric to obconic; phyllaries persistent or deciduous with fruit; pappus of 1 or 2 kinds per fruit, or 0

15. Plant glandular, scented; pappus elements of 1 kind (if of 2 kinds, awns 0) or 0 ..... L. coronaria

15' Plant glandless, unscented; pappus elements of 2 kinds or 0

16. Fruit >= 2 mm

17. Ray corolla <= 3 mm; pappus awns >= 4, rarely 0 ..... L. maritima

17' Ray corolla > 4 mm; pappus awns 2–3(4) or 0 ..... L. minor

16' Fruit < 1.5 mm

18. Pappus generally of 1 long awn and few to many short scales ..... L. burkei

18' Pappus generally of 3 or more long awns mixed with several short scales, or rarely 0 ..... L. fremontii

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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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