Crepis atribarba
Crepis pleurocarpa
dark hawksbeard, slender hawksbeard
naked hawksbeard, naked-stem hawksbeard
1–2, erect, slender, usually branched distal to middles, glabrous or tomentulose.
1–3, slender or stout, branched proximally (sparingly) or distally, glabrate to tomentulose.
basal and cauline; petiolate;
blades lanceolate to linear, 10–35 × 0.5–6 cm, margins deeply pinnately lobed (lobes narrowly lanceolate or linear, usually entire or toothed), apices acuminate, faces tomentulose to glabrate.
basal and cauline; petiolate (petioles relatively broadly winged);
blades elliptic or oblanceolate, often runcinate, 7–28 × 0.5–7 cm, margins pinnately lobed to dentate (lobes remote, lanceolate to narrowly triangular, often recurved), apices attenuate, faces usually tomentulose to glabrate, sometimes glandular.
cylindro-campanulate, 10–12 × 4–7 mm.
cylindro-campanulate, 8–16 × 3–5 mm.
6–35;
corollas yellow, 10–18 mm.
5–10(–12);
corollas yellow, 15–20 mm.
8–13, lanceolate, 10–12 mm (margins yellow, scarious, eciliate), apices acute, abaxial faces usually tomentulose, sometimes glabrous, often with coarse, green or blackish setae, adaxial glabrous or with fine, appressed hairs.
5(–10), (deep green or black) lanceolate, 10–16 mm, (bases becoming strongly keeled and swollen, often glabrous, margins yellowish, conspicuously and densely tomentulose), apices acute to strongly acuminate, abaxial faces densely tomentulose adaxial with fine hairs.
of 5–10, narrowly triangular to lanceolate, tomentose bractlets 1–3 mm.
of 5–6, deltate to lanceolate, tomentulose bractlets 1.5–4 mm.
3–30, in corymbiform arrays.
7–10(–30), in corymbiform arrays.
dark or blackish green, subcylindric, 3–10 mm, apices tapered, not beaked, ribs 12–15 (distinct);
pappi whitish, 5–9 mm.
deep reddish brown, subcylindric, 5–8 mm, apices constricted, ribs 10 (prominent);
pappi yellowish white, 6–12 mm (bristles unequal).
= 22, 33, 44, 55, 88.
= 22, 33, 44, 55, 77, 88.
Crepis atribarba
Crepis pleurocarpa
Crepis atribarba is generally recognized by the deeply pinnately lobed leaves with linear lobes, fine tomentulose indument on stems and leaves, setose phyllaries, and dark green, strongly ribbed cypselae. It is a variable mixture that includes polyploid, apomictic forms and hybrids with C. acuminata and other species. The typical form is recognized by its short stature, narrow pinnately lobed, tomentulose leaves, stems with 3–10 heads, and phyllaries with scattered, black, eglandular setae. Larger, more robust forms with stems 30–70 cm, 10–30+ heads, narrower involucres, and few or no black setae have been recognized as subsp. originalis. The latter was considered by E. B. Babcock (1947) to represent the original diploid form of the species; it is difficult to distinguish in practice.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Crepis pleurocarpa is distinguished by its narrow, acuminate, silvery leaves, 5(–10), strongly keeled phyllaries with conspicuous white, tomentose margins, strongly ribbed cypselae, and relatively few florets per head. Otherwise, it is very similar to C. acuminata and C. intermedia.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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PNW Herbaria
WildflowerSearch
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