Coefficient of Conservatism:
Coefficient of Wetness:
SAND REED GRASS
An important sand-binder of the dunes and beaches of the Great Lakes; rarely spreading along sandy roadsides and railroads, in jack pines and sand barrens near the shores.
Michigan specimens are almost all the Great Lakes region endemic var. magna Scribn. & Merr. This has an open, spreading panicle, compared to var. longifolia, which ranges west of Michigan and has a narrowly contracted panicle. Variety longifolia is apparently adventive along railroads in Kalamazoo Co. Calamovilfa longifolia var. magna is readily distinguished from Ammophila, our other common sand-binding dune grass, by the smaller spikelets in a more open panicle and, vegetatively, by the usually villous lower sheaths and often greater height (sometimes over 2 m).
Sometimes casually mistaken for Panicum virgatum (and vice-versa), which may also grow on the dunes, but easily distinguished by the tuft of hairs at the base of the lemma, which is lacking in the Panicum.