PREFACE 



THERE are many excellent textbooks of Botany 

 suitable for students of all stages, but nearly all deal 

 with European plants alone or are written from the 



ERRATUM 

 Page 182 Hn6 I for branches read leaves 



well known by name aim ^a.^ ^^^ _ 

 not figured, or only sufficiently so for identification ; 

 on the other hand, difficult points, like those in the 

 flowers of orchids and grasses, are shown, it is hoped, 



1 This word is, as far as I know, new, but seems so obvious 

 a designation of the habit of flowering once after many years, that 

 it may not be so. The only reference I have seen to the habit 

 by name is in Warming's Lehbuch de Algemeine Botanik where 

 such plants are called Pleiocyklishe Gewasche (S. 72). In view 

 of the commonly accepted term, biennial, for plants of two- 

 seasons, multiennial would seem more natural to English readers. 



921919 



