nearly always reflexed. Indusium minute, concealed beneath the sorus,
divided into a few beaded hairs.

Like the obtuse Woodsia this fern has no joint near the base of the stipe,
but is much smaller and has several points of difference. Limestone cliffs,
Gaspé Peninsula, southern shore of Lake Superior, Colorado, Oregon to the
northwest. Its eastern limit is northern Michigan.

(6) ROCKY MOUNTAIN WOODSIA. _Woódsia scopulìna_

Fronds six to fifteen inches long [smooth], lanceolate, pinnatifid. Pinnæ
triangular-ovate, the lowest pair shortened. Under surface of the whole
frond hispidulous with minute, white hairs and stalked glands. Indusium
hidden beneath the sporangia, consisting mostly of a few hair-like
divisions.

In crevices of rocks, mountains of West Virginia, Gaspé Peninsula, Rocky
Mountains, and westward to Oregon and California.

(7) CATHCART'S WOODSIA. _Woodsia Cathcartiàna_

Fronds eight to twelve inches high, lanceolate, bipinnatifid, finely
glandular-puberulent. Pinnse oblong; the lower distant segments oblong,
denticulate, separated by wide sinuses.

Rocky river banks, west Michigan to northeast Minnesota.