Sisyrinchium septentrionale Bicknell
Annotated by Anita Cholewa, 2008.

Montana: Sheridan County: [locality and coordinates withheld; status in Montana: S1S2 (Imperiled; MTNHP)],
Locally common in a strip of moist meadow on the edge of a shallow pothole with Poa pratensis and Juncus balticus. Flowewrs white in life Addendum to Flora of North America. When FNA-26 was first published sufficient material of S. septentrionale from southern Saskatchewan had not been seen. This region (including northeast Montana and norther North Dakota ) hosts populations of S. septentrionale that are regularly much shorter than western populations and which frequently have white flowers instead of pale blue. As in the western populations outer tepals have rounded apices--A. Cholewa Phenology: Flowers.

Peter Lesica 7190, Jun 4, 1996
MONTU, Accession: 126623