Bromus kalmii A. Gray - Prairie Brome


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Bromus kalmii - (image 1 of 2)



Family: Poaceae


Prairie remnants and calcareous fens.


In fens it grows with Angelica atropurpurea, Calamagrostis canadensis, Cirsium muticum, Eupatorium perfoliatum, Lathyrus palustris, Lilium michiganense, Lycopus americanus, Lysimachia quaddriflora, Mentha arvensis, Oxypolis rigidior, Parnassia glauca, Pedicularis lanceolata, Senecio aureus, Solidago ohioensis.


ME west to MN and SD, south to MD and IA. Presumably extirpated from ME.


Perennial grass; culms loosely clustered or solitary, 0.5-1.0 m. Leaves mostly 3-6 per stem, the nodes mostly exposed; sheaths villous or occasionally glabrous; blades to 10 mm x 20 cm, glabrous or hairy; ligule under 1 mm. Spikelets flattened, nodding; first glume usually 3-nerved; lemmas manifestly awned, pubescent, densely appressed-pilose with some hairs up to 1mm or more long.


Flowers in July

Wetland indicator: Facultative

This species appears to have become rather rare due to habitat destruction.


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 (
National Plant Data Center, Baton Rouge, LA 70874-4490 USA




 Michael Hough 2004