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    Vascular Plants of California
Key to families | Table of families and genera

Key to Eriophyllum

View taxon page for Eriophyllum

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

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

1. Annual 0.1–1.5(3) dm

2. Peduncle < 1 cm

3. Heads radiate ..... E. multicaule

3' Heads discoid

4. Leaf weakly rolled under, tip sharp-pointed; phyllaries 3–4 ..... E. mohavense

4' Leaf margins strongly rolled under, tip rounded; phyllaries 6–8 ..... E. pringlei

2' Peduncle >= 1 cm

5. Anther tip awl-like; disk corolla lobes glandular; ray white to yellow

6. Pappus of alternating long and short scales; fruit 2.5–4.5 mm; ray white ..... E. lanosum

6' Pappus 0 or of ± = scales; fruit ± 2 mm; ray yellow, occasionally cream-white ..... E. wallacei

5' Anther tip deltate; disk corolla lobes glandless; ray yellow

7. Pappus 0 or of minute scales; anther tip glabrous; s Sierra Nevada Foothills, Tehachapi Mountain Area, East of Sierra Nevada, Desert ..... E. ambiguum

8. Disk corolla lobes glabrous; pappus of 6–10 irregularly toothed scales 0.2–0.5 mm ..... var. ambiguum

8' Disk corolla lobes with 1-celled hairs; pappus 0 or scales entire, 0.1–0.2 mm ..... var. paleaceum

7' Pappus of scales >= 0.5 mm; anther tip glandular; c Sierra Nevada (Mariposa Co.)

9. Branches open, spreading; ray 3–5 mm; 500–1900 m ..... E. congdonii

9' Branches strictly ascending; ray ± 1 mm; 1800–2500 m ..... E. nubigenum

1' Generally perennial herb to shrub, occasionally flowering 1st year, 1–15 dm

10. Subshrub or shrub; heads 1–30+; peduncle 0–10(14) cm; ray 2–10 mm

11. Subshrub 3–15 dm; phyllaries 8–11; ray flowers (0)6–9; ray 3–5 mm; coastal dunes, bluffs, canyons ..... E. staechadifolium

11' Subshrub or shrub, 2–10 dm; phyllaries 4–8; ray flowers (0)4–8, ray 2–10 mm; generally non-coastal

12. Heads 1–5; peduncle 5–10(14) cm; ray flowers 5–8, ray 6–10 mm – San Francisco Bay Area, Inner South Coast Ranges ..... E. jepsonii

12' Heads 3–30+; peduncle 0–2.5(9) cm; ray flowers (0)4–6(8), ray 2–5 mm ..... E. confertiflorum

13. Heads 10–30+; peduncle 0–1(2) cm; involucre 3–5 mm diam; disk corolla 2–3 mm ..... var. confertiflorum

13' Heads 3–10; peduncle 0.5–2.5(9) cm; involucre 5–7 mm diam; disk corolla 3.5–4 mm ..... var. tanacetiflorum

10' Annual to subshrub, woody at base only; heads 1–5(10); peduncle (1)3–30 cm; ray 6–20 mm

14. Involucre 5–6(7) mm diam; peduncle 1–8 cm; ray flowers 6–8(13), ray generally 6–10 mm; rare; c-w San Francisco Bay Area (San Mateo Co.) ..... E. latilobum

14' Involucre 6–15 mm diam; peduncle 3–30 cm; ray flowers (0)5–13(15), ray 6–20 mm; not rare; widespread complex ..... E. lanatum

15. Tube of disk flower glabrous; rare, s Tehachapi Mountain Area, se Outer South Coast Ranges ..... var. hallii

15' Tube of disk flower very glandular or hairy; widespread

16. Ray flowers generally 8(5–10); phyllaries generally 8(5–10), strongly keeled; leaves entire or 3-(5-)lobed, margins flat ..... var. integrifolium

16' Ray flowers generally 9–13; phyllaries 9–15, keeled to flat; leaves entire to nearly compound, margins flat or rolled under

17. Leaves densely woolly on faces, entire or coarsely toothed (especially distal to middle), margins flat

18. Ray 7–10 mm; Klamath Ranges, High North Coast Ranges ..... var. lanceolatum

18' Ray 6–7 mm; c&s High Sierra Nevada, San Bernardino Mountains ..... var. obovatum

17' Leaves less hairy, (often green) adaxially, entire to nearly compound, margins rolled under

19. Leaves linear to ovate, entire to 2-compound, often woolly-tufted adaxially; pappus 0.5–1.5 mm; peduncle 3–30 cm; ray yellow

20. Leaves 1–3 cm, lobed to ± 2-pinnately compound; peduncle 3–10 cm, generally slender; involucre 6–8 mm; ray 6–9 mm ..... var. achilleoides

20' Leaves 3–8 cm, entire to pinnately lobed; peduncle 10–30 cm, generally swollen proximal to heads; involucre 8–10 mm; ray 10–20 mm ..... var. grandiflorum

19' Leaves narrowly oblanceolate or wider, serrate to sharply lobed, glabrous adaxially; pappus 0 or minute; peduncle 3–10 cm; ray golden yellow

21. Leaves ± diamond-shaped, proximal sharply 3–5 lobed, woolly-tufted abaxially; coastal ..... var. arachnoideum

21' Leaves oblanceolate to obovate, coarsely serrate or lobed distally, silky-woolly abaxially; High Sierra Nevada ..... var. croceum


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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