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A New Species of Megalaria from the North American West Coast, and Notes on the Generic Circumscription
Stefan Ekman and Tor Tønsberg
Vol. 99, No. 1 (Spring, 1996), pp. 34-40
Published by: American Bryological and Lichenological Society
Stable URL: http://www.jstor.org/stable/3244435
Page Count: 7
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Megalaria brodoana S. Ekman & Tønsberg sp. nov. (Lecanorales, lichenized Ascomycotina) is described from western North America (British Columbia, Washington, and Oregon). It is recognized by the following characteristics: a more or less granular, often bluish thallus; dark purplish brown to black, thick-margined apothecia; a greenish (K+ pure green, N+ purple-red) pigment in the epithecium; a brown-red to brown-purple (K+ red to purple-red, N+ orange-red) pigment in the proper exciple, hypothecium, and lower part of hymenium; a pure brown (K-, N-) pigment in the hypothecium; and one-septate, thick-walled, widely ellipsoid to subglobose spores. Megalaria brodoana occurs in humid, coastal forests along with a high number of oceanic lichens. The main phorophyte is Alnus rubra. The circumscription of the genus Megalaria is discussed. The combinations Megalaria columbiana (G. Merr.) S. Ekman and M. albocincta (Degel.) Tønsberg are made.
The Bryologist © 1996 American Bryological and Lichenological Society