506 P'of- Don's Descriptions of Indian Gentianese. 



since adopted and confirmed by Borckhausen, Schmidt and others. I am 

 aware much difference of opinion exists with respect to the multiplication of 

 genera, but in the present instance, as the species will be found gi-oiiped much 

 more naturally than in any method hitherto pursued in general systematic 

 works, those who object to them as genera will see the advantage of adopting 

 them as sections. Considering the many regions, especially in the southern 

 hemisphere, that are yet but partially explored, it is not intended that the 

 accompanying table should be taken as a complete view of the geographical 

 distribution of this family, but only as exhibiting an approximation to one 

 hereafter to be filled up by the discoveries of future travellers. The names 

 of several genera occur in that table, which are not recorded in any of the 

 systematic works yet published : for an account of these I beg to refer to the 

 fourth volume of my brother's " General System of Gardening and Botany." 

 I ought to notice, that some errors have crept into that account in trans- 

 cribing from my notes, and from the circumstance of my not having had an 

 opportunity of seeing the proof-sheets ; but most of these errors will be found 

 corrected in the present memoir. I am now disposed to refer Selatium and 

 Eudoxia to Gentiana, and to consider them as forming two sections of that 

 genus than as groups of a higher value, and Ulostomajimhriatum may be re- 

 garded as constituting a section of Gentianella, only differing in the whole of 

 the inside of the tube of the corolla being clothed with filamentous appendages. 

 The Selatium multicaule appears to connect Selatium and Gentiana. The 

 genus Glyphospermum is remarkable on account of its ligneous stem and 

 its apparently monoecious flowers. 



