Jepson eFlora
Key to families | Table of families and genera

Key to Crepis

View taxon page for Crepis

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

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 varieties) ..... 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

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [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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