Solidago riddellii - (image 1 of 4)
Taxonomy
Family: Asteraceae
Some authorities call this plant Oligoneuron riddellii (Frank) Ryberg. The genus Oligoneuron would include species with corymbiform inflorescences with numerous heads and involucral bracts that have a few longitudinal striations.
Habitat
Characteristic of wet calcareous prairies. Also associated with fens, wet meadows, and mesic prairies.
Associates
Distribution
Southern Ontario to OH, west to MN and MO.
Morphology
Herbaceous perennial to 1 m from a branching caudex, sometimes rhizomatous; stems most glabrous except in the inflorescence. Lower and upper leaves dissimilar: the lowermost well developed but often deciduous, mostly more than 1 cm wide, tapered to the petiolate bases; the upper gradually reduced, becoming sessile with usually more of less sheathing or clasping bases. Mid and upper cauline leaves glabrous, linear-lanceolate, recurved, often longitudinally folded, the tips attenuate and acute, sometimes 3-nerved. Flowers yellow; heads crowded, usually more than 50, in flat or flattish-topped, corymbiform inflorescences; inflorescence branches and pedicels glabrous.
Notes
Flowers early September to early November
Wetland indicator: Obligate
Hybrids with Solidago ptarmicoides have been called S. x bernardii B. Boivin.
References
Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of
Northeastern United States
and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY
Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.
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Michael Hough © 2010 |