Plate 42 



A. USNEA FLORIDA (L.) WEB. 



Plant showing the fruticose, much branched thallus, with the branches bearing many 



tinv fibrils. Natural size. 



B. RAMALINA SUBAMPLICATA (NYL.) FINK 



Two plants showing the irregularly lobed, more or less reticulated thallus and the apothe- 



cia. Enlarged lty& diameters. 



