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| |
| E. multicaule |
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| 4. Leaf weakly rolled under, tips sharp-pointed; phyllaries 34 |
| E. mohavense |
| 4' Leaf strongly rolled under, tips rounded; phyllaries 68 |
| E. pringlei |
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| 5. Anther tips awl-like; disk corolla lobes glandular; ligules white or yellow |
| |
| 6. Pappus of alternating long and short scales; fruit 2.54.5 mm; ligules white |
| E. lanosum |
| 6' Pappus 0 or of ± = scales; fruit ± 2 mm; ligules cream-colored to yellow |
| E. wallacei |
| 5' Anther tips deltate; disk corolla lobes nonglandular; ligules yellow |
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| 7. Pappus 0 or of minute scales; anther tips glabrous; s Sierra Nevada, s East of Sierra Nevada, Desert |
| E. ambiguum |
| 8. Disk corolla lobes glabrous; pappus of minute scales |
| var. ambiguum |
| 8' Disk corolla lobes with 1-celled hairs; pappus generally ± 0 |
| var. paleaceum |
| 7' Pappus of scales > 0.5 mm; anther tips glandular; c Sierra Nevada (Mariposa Co.) |
| |
| 9. Branches open, spreading; ligules > 2 mm; < 1900 m |
| E. congdonii |
| 9' Branches strictly ascending; ligules < 2 mm; > 1800 m |
| E. nubigenum |
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| 10. Heads (including ligules) < 15 mm diam, generally ± densely clustered |
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| 11. Ray flowers (0)69; leaves 320 cm; phyllaries 812; coastal |
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| 12. Leaves 820 cm; ligules ± 2 mm; pappus scales > 1 mm; s Channel Islands |
| E. nevinii |
| 12' Leaves 37 cm; ligules (0)35 mm; pappus scales < 1 mm; mainland, n Channel Islands |
| E. staechadifolium |
| 11' Ray flowers (0)46; leaves 17 cm; phyllaries 48; especially inland |
| |
| 13. Heads generally 1030+, dense; ligules 25 mm; ray flowers (0)46; fruits generally < 35; common |
| E. confertiflorum var. confertiflorum |
| 13' Heads 110, loose; ligules generally 510 mm; ray flowers generally 59; fruits generally 3075; possibly local derivatives of E. confertiflorum × E. lanatum |
| |
| 14. Subshrub; leaf lobes ± triangular, deep; phyllaries barely overlapping cw San Francisco Bay Area |
| E. latilobum |
| 14' Shrub; leaf lobes ± linear, almost to midrib; phyllaries clearly overlapping |
| |
| 15. Leaves ± obovate; peduncles < 3 cm; ray flowers (0)46; ligules 45 mm; c Sierra Nevada Foothills |
| E. confertiflorum var. tanacetiflorum |
| 15' Leaves ovate; peduncles 414 cm; ray flowers generally 68; ligules 610 mm; e Central Western California |
| E. jepsonii |
| 10' Heads (including ligules) 1545 mm diam, 1 or loosely clustered |
| |
| 16. Ray flowers (0 or 4) generally 59; ligules generally 510 mm; involucres 47 mm; possibly derivatives of E. confertiflorum × E. lanatum (see 13') |
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| 16' Ray flowers (0) generally 813; ligules 620 mm; involucres 512 mm; widespread complex |
| E. lanatum |
| 17. Tube of disk flowers glabrous; rare, Tehachapi Mountain Area, Outer South Coast Ranges |
| var. hallii |
| 17' Tube of disk flowers very glandular or hairy; widespread |
| |
| 18. Ray flowers generally 8(510); phyllaries 510, strongly keeled; leaves generally entire to 3-lobed, margins flat |
| var. integrifolium |
| 18' Ray flowers generally 913; phyllaries generally 913, keeled or flat; leaves entire to nearly compound, margins flat or rolled under |
| |
| 19. Leaves densely woolly above and below, entire or coarsely toothed (especially above middle), margins flat |
| |
| 20. Fruit hairy; ligules 710 mm; Klamath Ranges |
| var. lanceolatum |
| 20' Fruit glabrous; ligules 67 mm; s Sierra Nevada, San Bernardino Mountains |
| var. obovatum |
| 19' Leaves less hairy (often green) above, entire to nearly compound, margins rolled under |
| |
| 21. Leaves narrowly oblanceolate or wider, serrate to sharply lobed, glabrous above; pappus 0 or minute; peduncles 30100 mm; ligules golden-yellow |
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| 22. Leaves often diamond-shaped, lower sharply 35-lobed, woolly-tufted below; coastal |
| var. arachnoideum |
| 22' Leaves often obovate, coarsely serrate or lobed distally, silky-woolly below; Sierra Nevada |
| var. croceum |
| 21' Leaves linear to ovate, entire to 2-compound, often woolly-tufted above; pappus 0.51.5 mm; peduncles 30300 mm; ligules yellow |
| |
| 23. Leaves 13 cm, lobed to ± 2-pinnately compound; peduncles 30100 mm, slender; involucres 68 mm; ligules 69 mm |
| var. achillaeoides |
| 23' Leaves 38 cm, entire to pinnately lobed; peduncles 100300 mm, generally swollen beneath heads; involucres 810 mm; ligules 1020 mm |
| var. grandiflorum
|