Flora of North America species comparison

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Schoenoplectus purshianus var. williamsii

Schoenoplectus purshianus var. purshianus
Photo is of parent taxon
Photo is of parent taxon
Perianth

bristles absent.

bristles present.
2n

= 38.

= 38.

Schoenoplectus purshianus var. williamsii

Schoenoplectus purshianus var. purshianus
Phenology Fruiting summer to fall. Fruiting summer–fall.
Habitat Shores with relatively large water-level fluctuations Fresh-water shores, ponds, and ditches, usually drying, usually in sandy soils, often emergent, with relatively little water-level fluctuations
Elevation 20–300 m (100–1000 ft) 0–1000 m (0–3300 ft)
Distribution
from FNA
IN; MA; MI; WI
from FNA
AL; CT; DC; DE; GA; IL; IN; KY; MA; MD; ME; MI; MN; MO; NC; NJ; NY; PA; RI; TN; VA; WI; WV; ON; QC
Discussion

Schoenoplectus purshianus var. williamsii is known only from the type locality in Massachusetts, several counties in Michigan, one county in Indiana, and two counties in Wisconsin. In southwestern Michigan it is reportedly frequent on sandy shores of lakes with considerable water-level fluctuation spring to fall; the typical variety is infrequent in those habitats and often grows on shores with relatively uniform water levels (A. E. Schuyler 1972).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 23, p. 56. FNA vol. 23, p. 56.
Parent taxa Cyperaceae > Schoenoplectus > sect. Actaeogeton > Schoenoplectus purshianus Cyperaceae > Schoenoplectus > sect. Actaeogeton > Schoenoplectus purshianus
Sibling taxa
S. purshianus var. purshianus
S. purshianus var. williamsii
Synonyms Scirpus purshianus var. williamsii
Name authority (Fernald) S. G. Smith: Novon 12: 107. (2002) unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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