EXPLANATION OF PtiATfi 1 



PdLYPODIUM VULGARE L. VAR. CRI8TATUM LOV)^. 



Fig. 1. A frond showing the upper surface. 



Fig. 2. A frond showing the lower surface with its fruit dots. 



Fig. 3. The creeping rootstock. 



Fig. 4. A spore x 400. 



