Cyclachaena xanthiifolia (Nutt.) Fresen.
marsh-elder
Asteraceae (Aster family)

Introduction to Vascular Plants

Photograph

© Curtis Bjork     (Photo ID #21983)


Map

E-Flora BC Static Map

Distribution of Cyclachaena xanthiifolia
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Species Information

General:
Annual herb from a taproot; stems erect, simple, glabrous below, fine-hairy and glandular above, up to 2 m tall.
Leaves:
Basal leaves soon deciduous; stem leaves long-stalked, broadly egg-shaped or heart-shaped, 5-20 cm long, 2.5-20 cm wide, green above, whitish short-hairy below, at least when young, coarsely toothed or doubly-toothed.
Flowers:
Heads disciform, numerous in a large, terminal panicle, not subtended by the leaves; involucres 1.5-3 mm tall; the 5 outer involucral bracts larger than the 5 inner membranous bracts which partly enfold the achenes; female flowers obsolete or nearly so.
Fruits:
Achenes egg-shaped, sparsely fine-hairy towards the tip, minutely pimply in lines, 1.5-2 mm long; pappus lacking.

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Habitat and Range

Moist to mesic roadsides and waste places in the lowland, steppe and montane zones; infrequent throughout S BC; introduced from W US.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Cyclachaena xanthifolia (Nutt.) Fresen