AND THEIR SYSTEMATICAL ARRANGEMENT. 95 



Others (as Gleditsch, Sec), though authors 

 of systems distinct from that of Linnaeus, have 

 retained the essential characters, which this natu- 

 ralist had prefixed to his genera of Orchideae. 



Jussieu, in his excellent work, Genera plantar, 

 secund. Ord. nat. disposita, ranking the Orchidcce 

 among his " Monocotyledones staminibus epgynis" 

 certainly adopts a new principle of definition 

 in the order ; but in establishing its genera he 

 mostly makes use of the same characters as Linnseus, 

 viz. Cornu and Labellum, or what he calls lacinia 

 inferior calycis. 



Thunberg, who has carefully examined many 

 Cape-species, which in fact possess still greater 

 peculiarities than the European ones, has given,* 

 together with his general observations on the 

 natural order, his arrangement of its genera, 

 which is taken, like that of Linnaeus, partly from 

 the cornu nectarii, and partly from the labellum 

 and corolla, 



Gaertner and Necker must likewise be men- 

 tioned here. In the unparalleled work \>f the 



• TranfacuSoc. reg. Stockh. 1786. p. 254. 



