Jepson eFlora
Key to families | Table of families and genera

Key to Crepis

View taxon page for Crepis

1. Annual or biennial (perennial herb); base of plant generally not strongly swollen or woody (except some Crepis vesicaria subsp. taraxacifolia); taproot shallow, fibrous roots present

2. Fruit ± beakless

3. Involucre 5–8 mm; inner phyllaries with double row of ± black stalked glands along abaxial midrib, glabrous adaxially; fruit ± brown-yellow ..... C. capillaris

3' Involucre 6–9 mm; inner phyllaries minutely tomentose to short-hairy abaxially, minutely hairy adaxially; fruit ± dark red- or purple-brown ..... C. tectorum

2' Fruit, at least inner, distinctly beaked

4. Fruits of 2 forms, outer beakless, inner finely beaked ..... C. vesicaria subsp. taraxacifolia (2)

4' Fruits all similar, beaked

5. Stem coarsely long- or short-hairy; cauline leaf blade sagittate, sharply lobed; phyllaries not reflexed; fruit ± red-brown, beak 1–2 mm ..... C. setosa

5' Stem short-hairy or tomentose to ± glabrous, not coarsely long-hairy; cauline leaves sessile, clasping but not sagittate and sharply lobed; phyllaries reflexed at maturity; fruit pale brown to yellow, beak 2–5 mm ..... C. vesicaria subsp. taraxacifolia (2)

1' Perennial herb; base of plant swollen and ± woody; taproot (or creeping rhizome) well developed, deep

6. Plant entirely glabrous (leaves occasionally puberulent in Crepis bursifolia)

7. Stem flexible, arched or decumbent, cymosely branched distally; leaves generally pinnately divided; heads 2–3; beak of fruit ± 2 × body; disturbed areas ..... [C. bursifolia]

7' Stem ± erect or ascending, generally branched; leaves generally round to spoon- or fiddle-shaped, entire or few-toothed to shallowly lobed; heads 5–10(100); fruit tapered but not beaked; alpine ..... C. nana

6' Plant generally ± hairy (Crepis runcinata sometimes glabrous)

8. Leaves generally dentate, sometimes pinnately lobed ..... C. runcinata

9. Leaf green, teeth prominently white-tipped; inner phyllaries widely lanceolate or elliptic to oblong ..... subsp. andersonii

9' Leaf glaucous, teeth not prominently white-tipped; inner phyllaries linear to narrowly lanceolate ..... subsp. hallii

8' Leaves generally pinnately lobed or divided or sharply serrate

10. Herbage and involucres coarsely hairy, hairs 1–3 mm; phyllaries acute or long-acuminate

11. Herbage and involucres densely coarse-hairy and stalked-glandular; inner phyllaries long-acuminate ..... C. monticola

11' Herbage and involucres bristly and ± short-tomentose, generally not stalked-glandular; inner phyllaries acute (see 13. for vars.) ..... C. modocensis (2)

10' Herbage and involucres ± short-tomentose, hairs or bristles generally < 1 mm; phyllaries acute

12. Inner phyllaries with ± black, ± white, or green bristles; fruit ± dark green to deep red, dark brown or ± black, weakly ribbed or striate ..... C. modocensis (2)

13. Stem branched near or distal to middle; involucre 11–16 mm; pappus 5–10 mm ..... subsp. modocensis

13' Stem low, branched near base; involucre 13–21 mm; pappus 9–13 mm ..... subsp. subacaulis

12' Inner phyllaries generally glabrous, tomentose, or less often short-stalked-glandular or with few black bristles; fruit ± yellow, light to dark brown, red-brown, or deep green, distinctly ribbed

14. Largest heads with 5–8 inner phyllaries; flowers generally 5–10

15. Cauline leaves well developed; heads 30–70(100+) in compound flat-topped cluster; inner phyllaries generally glabrous or occasionally evenly tomentose, not strongly keeled; fruit ± yellow or yellow-brown ..... C. acuminata

15' Cauline leaves much reduced; heads 7–10(30) in small cyme-like cluster; inner phyllaries conspicuously white-tomentose near margins, bases becoming strongly keeled, midrib generally glabrous; fruit red-brown ..... C. pleurocarpa

14' Largest heads with 7–14 inner phyllaries; flowers 6–40

16. Plant 25–60 cm; heads generally > 20, in large ± flat-topped or panicle-like cluster; involucre 3–5 mm diam; flowers 7–12 ..... C. intermedia

16' Plant 5–40 cm; heads generally < 20 in cyme-like or panicle-like cluster; involucre 5–15 mm diam; flowers 10–40

17. Herbage green, stalked-glandular; leaf midribs often conspicuously red-purple when fresh; inner phyllaries conspicuously stalked-glandular (glabrous) ..... C. bakeri

18. Involucre narrowly cylindric to ± obconic, 18–21 mm in fruit; outer phyllaries deltate, longest << inner; pappus > fruit ..... subsp. idahoensis

18' Involucre widely cylindric, 13–20 mm in fruit; outer phyllaries lanceolate, longest ± 1/2 inner; pappus ± <= fruit

19. Involucre 16–20 mm in fruit; fruit 8–10.5 mm, tip slightly tapered; pappus 9–10.5 mm ..... subsp. bakeri

19' Involucre 13–17 mm in fruit; fruit 6–9 mm, tip strongly tapered; pappus 6–9 mm ..... subsp. cusickii

17' Herbage ± gray-tomentose, stalked-glandular or not; leaf midribs not red-purple, inconspicuous; phyllaries stalked-glandular or not ..... C. occidentalis

20. Inner phyllaries with at least some stalked glands

21. Inner phyllaries, peduncles, and distal cauline leaves stalked-glandular and with large dark or black bristles; largest heads with 8 inner phyllaries and 12–14 flowers ..... subsp. costata

21' Inner phyllaries, peduncles and distal cauline leaves stalked-glandular, but lacking large dark or black glandular bristles; largest heads with 10–13 inner phyllaries and 18–30 flowers ..... subsp. occidentalis

20' Inner phyllaries glandless, or if with a few stalked glands then involucre with 8 phyllaries

22. Stem generally low, 5–20 cm, branched near base; inner phyllaries 8–12; leaves deeply pinnately lobed, lobes narrow, remote, lanceolate, few-toothed ..... subsp. conjuncta

22' Stem well developed, 10–40 cm, with definite primary axis below heads; inner phyllaries generally 8; leaves strongly dentate or pinnately lobed, lobes closely spaced ..... subsp. pumila


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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