﻿XL COMPENDIUM. 



FoUowiug pages contain besides descriptions keys to the determination 

 of the families, tribes, genera and species. 



If one supposes to have found in the keys the name sought after, he 

 should not omit reading the diagnosis itself, seeing the plants are determined 

 -by more characteristics than those few admitted in the keys These are 

 uiere expedients, no infallible guides; they chiefly had to be extracted 

 from the available diagnoses since I did not set eyes on a great part of the 

 plants. Furthermore it would have been like looking for a needle in a hay- 

 stack to insert all deviations from the normal forms. Consequently the use 

 of the keys may be sometimes the cause of going wrong. 



In comparing the collected plants with the descriptions given in this and 

 other works one should bear in mind that dill'erent authors are not always 

 unanimous in using botanical terms. So, for instance, the word ovafe is not 

 rarely used for oval or even deltoid or another terra, spreading for horizontal, 

 erecto-patent for more or less oblique, conspicuous and inconspicuous for distinct 

 and indistinct, costa for rachis, costula for main vein, vein for veinlet, pinna for 

 lobe or lacinia, medial for medial on the veins or medial between the costae 

 {costulae) and edge, excurrent for directed towards the margin, forking for 

 fork branch, ^c. 



