158 



GLOSSARY AND INDEX. 



Vallecuia (plu. valUculte)^ the 

 grooves on the stems of Eguisetum. 



Variation among species, z. 



Varilties, 45- 



Vascular (Lat. vasculum^ diminu- 

 tive of z/rtj, a vessel), containing ves- 

 sels, as ducts, etc. 



Velum (Lat. a curtain), the membra- 

 nous margin of the fovea in Isoetes. 



Venation (Lat. venn, a vein), the 

 veming of the frond, lo. 



Vernation (Lat. w>-, spring), the 

 arrangement of the leaves or fronds 

 in the bud, 29. 



Vittaria, 89; also 6, 13, 79. 



W. 

 Walking-leaf. Vidt Camp- 



tosorus. 

 Water-fern. FzA Wlarsilea. 

 Wood-fern. Vide Dryopteris. 

 Woodsia, ng; also 6, n, 17, 43, 79. 

 Woodwardia, 102 ; also 2, 5, 10, 



IS, 8r. 



