EXPLANATION OF PLATE 1 



POLYPODIUM VULGARE L. VAK. CRI8TATUM LOWC. 



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, 



I 



