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Much like the last, but the rather larger fronds puberulent beneath with minute jointed hairs and stalked glands; indusium deeply cleft into narrow segments ending in jointed hairs.—Rocky places, Minn., southward and westward.

Bark.—On trunks of old trees thick, shallow-channeled, broad-ridged; on stems of young trees and upon branches smooth, greenish; season's shoots at first rusty-scurfy or puberulent, in late autumn becoming smooth and light russet brown.

Finely puberulent; leaves mostly ovate and acutish with a cordate base, often small; flowers small and mostly cleistogamous.—Sandy or stony shores and islands of Lakes Huron and Superior.

Leaves mostly pubescent or puberulent; hoods obtuse, entire, twice or thrice the length of the anthers.

Stouter and more rigid, leaves of radical shoots thicker, linear, hoary, the cauline puberulent or glabrous, calyx canescent.