Culberson, WL/ Culberson, CF 1982: Evolutionary modification of ecology in a common lichen species. - Systematic Botany7: 158-169. [RLL List # 114-12 / Rec.# 3803] Keywords: EVOLUTION/ PSEUDOPARMELIA/ ECOLOGY/ COMPETITION
Abstract: 5 figures. 1 table. ["Pseudoparmelia caperata in eastern North America may have sustained genetic impoverishment through the loss of gamodemes adapted to the microhabitat of rock as a result of intense competition with P. baltimorensis in the past. Each species still occsionally grows in the other's preferrd microhabitat and both may grow in approximately equal numbers on tree bases, which seem to be ecologically intermediate...."]