Helminthotheca echioides

(Linnaeus) Holub

Folia Geobot. Phytotax. 8: 176. 1973.

IntroducedIllustrated
Basionym: Picris echioides Linnaeus Sp. Pl. 2: 792. 1753
Treatment appears in FNA Volume 19. Treatment on page 300.

Leaf blades 50–150(–250) × 10–50(–80+) mm. Peduncles 1–5+ cm, bristly hispid. Calyculi: bracts 9–15+ × 3–5+ mm, margins and tips bristly-ciliate. Phyllaries often sigmoid in fruit, abaxial faces and tips bristly. Cypselae: bodies 2.5–3 mm, beaks 2.5–5 mm; pappi 4–7 mm. 2n = 10.


Phenology: Flowering May–Nov.
Habitat: Disturbed sites
Elevation: 0–50(–500) m

Distribution

V19-439-distribution-map.gif

Introduced; Alta., N.B., Ont., Sask., Ariz., Calif., Conn., D.C., Iowa, Maine, Md., Mass., Mo., Mont., N.J., N.Y., N.Dak., Ohio, Oreg., Pa., Vt., Va., Europe, widely introduced elsewhere.

Discussion

Reports for British Columbia and Nova Scotia need confirmation.

Selected References

None.

Lower Taxa

None.
... more about "Helminthotheca echioides"
John L. Strother +
(Linnaeus) Holub +
Picris echioides +
Alta. +, N.B. +, Ont. +, Sask. +, Ariz. +, Calif. +, Conn. +, D.C. +, Iowa +, Maine +, Md. +, Mass. +, Mo. +, Mont. +, N.J. +, N.Y. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, Vt. +, Va. +, Europe +  and widely introduced elsewhere. +
0–50(–500) m +
Disturbed sites +
Flowering May–Nov. +
Folia Geobot. Phytotax. +
Introduced +  and Illustrated +
Undefined tribe Lactuceae +
Helminthotheca echioides +
Helminthotheca +
species +