Sisyrinchium atlanticum E. P. Bicknell
Coefficient of Conservatism: 9
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt P-Forb
Status: T

Very local in sandy, moist fields and moist sandy shores.

The peduncles are generally strongly geniculate at the base, as are most of the spathes also.

This is a coastal plain disjunct, and may be confused with the similar Sisyrinchium strictum, which, however, has the stems minutely denticulate on the margins as in S. angustifolium.

The Midland Co. record mapped in Michigan Flora, Vol. 1 was based on a rare specimen of Sisyrinchium mucronatum with a branched inflorescence.


Allegan County
Berrien County
Muskegon County
Newaygo County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 24, 2021.