104 SWARZ ON THE GENERA OF ORCHIDEiE, 



"with something that might properly be. called 

 nectarium. This consists of a. longer or shorter, 

 pointed or blunt spur, sometimes in the form of a 

 purse, pit, &c ;* sometimes entirely empty, at other 

 times • filled with a small quantity of liquid. In 

 some genera it is not found at all, though the lip 

 be not wanting (Ophrys, &c). It is therefore 

 not consistent to consider the labellum as a part of 

 the nectarium, which some botanists have thought 

 necessarily to belong to the Orchid@as; or as the 

 nectarium itself, which has been done by others. 

 This is so much the more obvious . as such 

 spur- or purserlike elongations are also found (and 

 sometimes double) upon the back-part of the 

 upper vaulted leaf of the calyx, situated oppo- 

 site the labellum (Disa, Satyrium). Sometimes, 

 however, when these escrescencies are wanting 

 both upon the helmet and lip, the lateral leaves of 

 the calyx themselves are pursed or concave (Cory- 

 ciurn, Pterygodium, Disperis). That in several 

 Orchideas any nectareous liquid should be secreted 

 at the lower part of the lip, I can deny. 



* This might be called with a general name Calcar instead, of Cornu. 



