Woodsia alpina (Bolton) Gray
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Woodsiaceae
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Scientific Name
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Description
Species Description - Rhizome-scales lanceolate or lance-ovate, 4-6 × 1-2 mm, brown, denticulate, sparsely fimbriate; lvs 6-15 cm; petiole bright brown, sparingly scaly and hairy, articulate below the middle; blade linear, 1-2 cm wide, slightly narrowed below, pinnate-pinnatifid, sparsely hairy on the rachis and lower surface, the rachis also sparsely scaly; pinnae sessile, 8-15 pairs, ovate, obtuse, deeply pinnatifid, the segments 2-3(4) pairs, oblong to suborbicular, the lower sublobate, not ciliate; indusium a small disk with a few long septate marginal hairs; 2n=156, thought to be an alloploid derived from nos. 1 [Woodsia glabella R. Br.] and 3 [Woodsia ilvensis (L.) R. Br.]. Rock crevices in cool sites; circumboreal, s. to N.S., Vt., N.Y., Mich., and Minn. A sterile triploid hybrid with no. 3 [Woodsia ilvensis (L.) R. Br.] is W. ×gracilis (G. Lawson) Butters.
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Common Names
alpine cliff-fern