THE AMERICAN BOTANIST 85 



was according to that classification that the genera and tribes 

 were distributed at the Trianon. The arrangement had the 

 advantage of keeping compact the representation of the 

 groups, and the classical formation of the essential characters 

 only. His tribes were often connected by strong primitive 

 characters and the groups were represented as they exist to day 

 — of course less fully. Each of the groups presented a general 

 set of characters appertaining more or less to all the tribes in 

 the group. By this plan the Dicotyledons were in three di- 

 visions, and were provided by Antoine de Jessieu with new 

 groups of a uniform character and more alike as to arrange- 

 metn and terminology. 



There was no indication of the so-called "Herbaceous 

 Ground" in Jussius work. On the contrary trees, shrubs and 

 herbs were represented in his groups, and tender exotics intro- 

 duced from time to time as pot-plants. The Herbaceous 

 Ground is a survival of Linnean arrangements laid down at 

 the Royal Gardens Kew and elsewhere — copying after Pliny 

 who divided plants into trees, shrubs, and herbs, — an arrange- 

 ment convenient enough in a nursery, but strangely incon- 

 sistent and confusing in a systematic garden, which often has 

 plants of all three habits in a genus, such as Cornus for in- 

 stance, scattered from one end of 300 acres to the other in 

 dire confusion!" 



