Difference between revisions of "Helminthotheca echioides"
Folia Geobot. Phytotax. 8: 176. 1973.
Basionym: Picris echioides Linnaeus
Treatment appears in FNA Volume 19. Treatment on page 300.
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Revision as of 01:17, 27 July 2019
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
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.