Coefficient of Conservatism:
Coefficient of Wetness:
A. A. Reznicek
S. asper of Michigan Flora.
Dry to moist fields, dry road and rail verges. Native east and south of Michigan, but probably adventive here despite some collections from dry prairies. The earliest collections were not until 1931, in Berrien and Wayne Cos.; the Wayne Co. collections from along a railway. Now becoming abundant in the medians and along the shoulders especially of major highways.
Even more than the common S. cryptandrus, the mature inflorescences usually remain within the sheaths, except for the very tip, but the enveloping sheaths do not bend into a sickle-like form. Also the long filiform-involute leaves are very different from the flat, short blades of S. cryptandrus, and give a distinctive reddish-bronze fall coloration to highway sides where abundant.