Southern Appalachian Russulas. I

Abstract
Morphological and habitat descriptions, illustrations and taxonomic discussions of 8 spp. of Russula occurring in the Southern Appalachian Mountains of North America are presented. R. earlei, R. ballouii, R. mariae, R. flavida, R. claroflava and R. sanguinea are redescribed. A new subsection of Russula is proposed to accommodate an unusual species, R. ochricompacta sp. nov., R. aciculocystis, a previously unvalidated species proposed by C. H. Kauffman, is described. External basidiospore morphology of the species endemic to North America is examined by scanning electron microscopy.

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