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Some authorities call this plant Oligoneuron ohioense (Frank ex Riddell) G.N. Jones. The genus Oligoneuron would include species with corymbiform inflorescences with numerous heads and involucral bracts that have a few longitudinal striations.
Characteristic of calcareous fens. Also on low sandflats near Lake Michigan.
In fens with Aster novae-angliae, Cirsium muticum, Eupatorium maculatum, Liatris aspera, Lobelia kalmii, Lycopus americanus, Lysimachia quadriflora, Lythrum alatum, Oxypolis rigidior, Parnassia glauca, Pedicularis lanceolata, Potentilla fruiticosa, Solidago riddellii. On low sandflats with Aster ptarmicoides, Hypericum kalmianum, Juncus balticus littoralis, Lobelia kalmii, Parnassia glauca, Satureja (Calamintha) arkansana.
Central NY and southern Ontario west to IL, MI, and WI.
Herbaceous perennial. Lower and upper leaves dissimilar: the lowermost well developed and usually persistent, 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. Leaves flat, obtuse to subacute, never 3-nerved. Stems and leaves glabrous. Flowers yellow; heads in flat or flattish-topped, corymbiform inflorescences; inflorescence branches and pedicels glabrous.
Flowers mid June to early October
Wetland indicator: Obligate
One of the commonest plants in rich fens. Considered to be threatened in NY, perhaps due to vulnerability of fens to exploitation.
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.
USDA, NRCS. 2002. The PLANTS Database, Version 3.5 (http://plants.usda.gov).
National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
Michael Hough © 2005