Hygrocybe andersonii a new psammophilus Hygrocybe from Horn Island, a Mississippi barrier island

Abstract

Hygrocybe andersonii, a new species always found in association with Ceratiola ericoides on barrier islands and mainland sand dunes, is described. This Hygrocybe is distinguished from other Hygrocybes by its densely cespitose method of growth, its occurrence in sand in the vicinity of Ceratiola ericoides, large bacilliform spores, and the presence of colorless, blue flourescing compounds on chromatograms prepared from pigment extracts. In addition, these chromatograms exhibit a complex of yellow to orange pigments of R_f 0.14 to 0.25 that replace rhodohygrocybin as found in most other Hygrocybes.

Key Words:

• Walter Inglis Anderson
• basidiomycete
• Ceratiola ericoides
• dune stabilization
• Hygrophoraceae
• systematics