1 5 8 



GLOSSARY AND INDEX. 



Vallecuia (plu. vallecula\ the 

 grooves on the stems of Equisetum. 



Variation among species, 2. 



Varilties, 45. 



Vascular (Lat. vascvlum, diminu- 

 tive of vas, a vessel), containing ves- 

 sels, as ducts, etc. 



Velum (Lat. a curtain), the membra- 

 nous margin of the fovea in Isoetes. 



Venation (Lat. vena, a vein), the 

 veining of the frond, 10. 



Vernation (Lat. ver, spring), the 

 arrangement of the leaves or fronds 

 in the bud, 29. 



Vittaria, 8 y ; also 6, 13, 79. 



W. 



ride Camp- 



Walking-leaf. 



tosorus. 



Water-fern, ride Marsilea. 

 Wood-fern. I'ide Dryopteris. 

 Woodsia, 119; also 6, n, 17, 43, 79. 

 Woodwardia, 102 ; also 2, 5, 10, 



15, 81. 



