Flora of North America species comparison

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Crepis intermedia

gray hawksbeard, grey hawksbeard, intermediate hawksbeard, limestone hawksbeard, small-flower hawksbeard
Habit Perennials, 25–60 cm (taproots stout or slender, caudices swollen, simple or branched, covered with brown leaf bases).
Stems

1–2, erect, branched (proximal branches elongate, branched distally), ± tomentose-canescent.
Leaves

basal and cauline; petiolate (petiole bases clasping);

blades elliptic-lanceolate, 10–40 × 2–9 cm, margins pinnately lobed (lobes remote or close, entire or dentate), apices acute or acuminate, faces densely or sparsely gray-tomentose.
Involucres

narrowly cylindric, 10–16 × 3–5 mm.
Florets

7–12;

corollas yellow, 14–30 mm.
Phyllaries

7–10, (medially green) lanceolate, 10–13 mm (margins scarious), apices acute, abaxial faces ± tomentulose, sometimes with greenish eglandular setae, adaxial with fine hairs.
Calyculi

of 6–8, narrowly triangular, tomentulose bractlets 2–4 mm.
Heads

(10–)20–60, in ± flat-topped, compound, corymbiform or paniculiform arrays.
Cypselae

yellow or golden brown, subcylindric, 6–9 mm, tapered distally, ribs 10–12 (smooth);

pappi dusky white, 7–10 mm.
2n

= 33, 44, 55, 88.

Crepis intermedia
Phenology Flowering May–Jul.
Habitat Open rocky ridges, dry slopes, open forests
Elevation 800–3900 m (2600–12800 ft)
Distribution
from FNA
AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; SK
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[BONAP county map]
Discussion

Crepis intermedia is a somewhat unnatural group of polyploid apomicts that combines the features of multiple species, including C. acuminata, C. pleurocarpa, C. modocensis, and C. atribarba (E. B. Babcock 1947). The plants are usually over 25 cm, with leaves deeply pinnately lobed (gray-tomentose, cleft about halfway to midribs), with acuminate apices, and more or less flat-topped arrays of heads. The leaves vary greatly in size and lobing and are always gray-tomentose. The number of heads per plant is usually more than 20.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 229.
Parent taxa Asteraceae > tribe Cichorieae > Crepis
Sibling taxa
C. acuminata, C. atribarba, C. bakeri, C. barbigera, C. biennis, C. bursifolia, C. capillaris, C. elegans, C. foetida, C. modocensis, C. monticola, C. nana, C. nicaeënsis, C. occidentalis, C. pannonica, C. pleurocarpa, C. pulchra, C. rubra, C. runcinata, C. setosa, C. tectorum, C. vesicaria, C. zacintha
Synonyms C. acuminata var. intermedia
Name authority A. Gray: in A. Gray et al., Syn. Fl. N. Amer. 1(2): 432. (1884)
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Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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