North American Musci Perfecti.

ISSUED BY A. J. GROUT, PH. D.

387. **Grimmia alpicola** Hedw. var. rivularis
(Brid.)

Broth. forma acutifolia n.f.

Folia longe acuminata Siliceous rocks,
beds of intermittent streamlet, subalpine
zone, Longs Peak, Colorado, alt. 10,400 ft.,

July 7, 1939,

with Hygrohypnum ochraceum & H. molle.

Coll. Walter Kiener (no. 8071).

Det. Dixon.

"The striking feature is the prolongation of the leaves into a long narrow proboscis, but this is not quite constant and I am inclined to believe it is rather in the nature of a sport. I cannot match it with anything I have". H. N. Dixon in a letter.

Yale University Herbarium

YU.226214