$6 SWARZ ON THE GENERA OF ORCHIDEjE, 



former, the fruits of Epidendium and Serapias 

 are very well represented. The essential cha- 

 racters of these two genera, he appears to have 

 taken from the interior parts of the flower, as well 

 as of the fruit, in which he has followed Haller; 

 though, with regard to the nature of these parts, 

 both naturalists seem to be of different opinions. 

 Necker, the all-changing author of Phytozoologia 

 philosophica, has founded his species naturales 

 sinarmophyta* (as he calls them), as well upon 

 the difference in the lip and spur (the whole of 

 which he terms productum), and the nature of the 

 fruit, as upon the situation of the flower, and the 

 conformation of the root. 



From what I have said, it appears that most 

 attention has been paid to the exterior of the 

 flower, and indeed, I think, that good characters 

 taken from parts easily to be discovered, ought in 

 general to be preferred ; but . as those of the 

 Orchidese do not always unite species naturally 

 related, it will perhaps be necessary to find out 



* Hera. bot. T. 3. p. iaj. 



