Wyoming Rare Plant Field Guide
Equisetum scirpoides
- Similar Species: E. variegatum has wider, more erect stems with 4-10 vertical grooves and 4- 10 toothed sheaths.
- Spore-Producing Period: May-June.
- Distribution: Circumboreal, south to Washington, Montana, Michigan, and Connecticut. Disjunct in the Black Hills of South Dakota and Wyoming (Crook Co.).
- Habitat: Shaded, damp, moss-covered rocks along streams in white spruce and fir woods. Elev. 5300 ft.
- References: Cobb 1956; Fertig 1993 b; Hitchcock et al. 1969; Lellinger 1985; Ode and Marriott 1990.
