GLOSSARY. XXXI 



Ventral, belonging to or on the front, i.e., the face of a leaf next the stem. 

 Vermicular, narrow and curved, like a little worm (cells, Tab. LIL, D. ic). 

 Vesicular, inflated like a bladder. 

 Verruculose, covered with wart-like prominences (cells, Tab. III., 19). 



Whorled, arranged in a whorl or ring (innovations, Tab. I., 14). 



NOTE ON THE MEASUREMENTS EMPLOYED. 



Macroscopical measurements (of stems, leaves, setae, capsules, 

 etc.) are given in inches and lines, i.e., twelfths of an inch ; 

 microscopical measurements (of cells, spores, etc.) in millimetres, 

 expressed in terms of yu (//. = ^* 00 mm.). For purposes of 

 comparison it may be borne in mind that for small measurements 

 100 fi = ttoVo °f an inch, and for larger measurements 1 mm. = £ 

 a line, or 1 line = 2 mm., very nearly. 



