Crepis setosa

Haller f.

Arch. Bot. (Leipzig): 1(2): 1. 1797.

Common names: Bristly hawksbeard
Introduced
Treatment appears in FNA Volume 19. Treatment on page 237. Mentioned on page 223.

Annuals, 8–80 cm (taproots shallow). Stems 1, erect (often reddish), stout (fistulose), simple or branched proximally, coarsely setose or hispid (at least distally, setae yellowish). Leaves basal and cauline; petiolate; blades oblanceolate, often runcinate or lyrate, 5–30 × 1–8 cm, margins dentate to pinnately lobed (terminal lobes often relatively large), apices acute to obtuse, faces finely hispid (coarsely setose along midribs; cauline leaves lanceolate, bases sagittate with acuminate lobes, margins dentate to deeply laciniate proximally). Heads 10–20, in paniculiform or cymiform arrays. Calyculi of 10–14, linear, coarsely setose bractlets 2–4 mm. Involucres cylindro-campanulate, 6–10 × 4–10 mm. Phyllaries 12–16, lanceolate, 6–7 mm, (bases strongly keeled and thickened, margins green to yellowish), apices acuminate, abaxial faces coarsely setose or hispid, adaxial with fine hairs. Florets 10–20; corollas yellow, sometimes reddish abaxially, 8–10 mm. Cypselae reddish-brown, fusiform, 3–5 mm, beaked (beaks 1–2 mm), ribs 10 (rounded, spiculate near bases of beaks); pappi white (fine, soft), 4 mm. 2n = 8.


Phenology: Flowering May–Nov.
Habitat: Openings in mixed conifer forest, disturbed areas, lawns
Elevation: 50–500 m

Distribution

V19-313-distribution-map.gif

Introduced; Calif., Conn., Mo., Mont., N.Y., Ohio, Oreg., Pa., Tenn., Tex., Vt., Wis., Europe

Discussion

Crepis setosa is recognized by its annual habit, shallow roots, coarsely setose stems, leaves, and involucres, the relatively large runcinate leaves, sagittate-laciniate cauline leaves, finely beaked cypselae, and white, fine pappus bristles.

Selected References

None.

Lower Taxa

None.

"fine" is not a number."fine" is not a number.

... more about "Crepis setosa"
hispid +  and setose +
with appressed hairs +  and glabrous +
scarious +
ovate +  and lanceolate +
cymiform +  and paniculiform +
indeterminate +  and determinate +
David J. Bogler +
Haller f. +
runcinate +, lyrate +, lanceolate +  and linear or spatulate +
decurrent +
compound +  and simple +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
lyrate;runcinate;oblanceolate +
1cm;8cm +
tuberculate +, rugose +, muricate +  and smooth +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
filiform +
lobing +, entire +  and lobed +
Bristly hawksbeard +
zygomorphic +, actinomorphic +  and (3-)5-merous +
reddish +  and yellow +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
reddish-brown +
Calif. +, Conn. +, Mo. +, Mont. +, N.Y. +, Ohio +, Oreg. +, Pa. +, Tenn. +, Tex. +, Vt. +, Wis. +  and Europe +
50–500 m +
winged +  and beaked +
dispersed +
Openings in mixed conifer forest, disturbed areas, lawns +
indeterminate +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
cylindro-campanulate +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
cauline +  and basal +
toothed +
dentate +  and entire +
green +  and yellowish +
dentate +  and pinnately lobed +
2-carpellate +
persistent +
connate +  and distinct +
4 cm40 mm <br />0.04 m <br /> (?) +
Flowering May–Nov. +
connate +  and distinct +
12 +  and 16 +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Arch. Bot. (Leipzig): +
hairy +  and glabrous +
convex;flat +
spiculate-roughened +
exalbuminous +
Introduced +
branched +  and simple +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Crepis setosa +
species +
taprooted +  and rhizomatous +
8 cm80 mm <br />0.08 m <br /> (80 cm800 mm <br />0.8 m <br />) +
shrub +  and subshrub +
11 +, 6 +, 5 +, 4 +  and 3 +