Calicium denigratum(Vain.) Tibell, a new lichen record for North America

[摘要] Calicium denigratumwas previously known from Europe and Siberia. It is reported here for the first time in North America from open canopy woodlands in northeastern Ontario and northeastern New Brunswick. Distinctions between the two species that are most similar,C. abietinumandC. glaucellum , are also presented.

[学科分类] 植物学

[关键词] Calicium denigratum;Calicium abietinum;Calicium glaucellum;North America