Schoenoplectus purshianus var. williamsii
Novon 12: 107. 2002.
Basionym: Scirpus purshianus var. williamsii Fernald Rhodora 3: 252. 1901
Revision as of 21:10, 16 December 2019 by FNA>Volume Importer
Perianth bristles absent. 2n = 38.
Phenology: Fruiting summer to fall.
Habitat: Shores with relatively large water-level fluctuations
Elevation: 20–300 m
Distribution
Ind., Mass., Mich., Wis.
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).
Selected References
None.
Lower Taxa
None.