Asplenium trichomanes subsp. quadrivalens
D.E. Mey.
Family:
Aspleniaceae
FNA
Resources
Warren H. Wagner Jr.
Robbin C. Moran
Charles R. Werth in Flora of North America (vol. 2)
Spores (as measured in Hoyer's Solution) 37--43 µm. 2 n = 144.
Calcareous rocks such as limestone and dolomite; 0--3000 m; B.C., Ont., Que.; Conn., Del., Ill., Maine, Md., Mass., Mich., N.H., N.J., N.Y., Ohio, Oreg., Pa., Vt., Va., Wash., W.Va., Wis.; Europe; Asia; Africa; Pacific Islands in New Zealand; Australia.
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