Covimcnccment and Progress of Orchid Culture. 141 



The last form is much more distinct from the two first than they are 

 from each other; and it may be requisite to combine Malaxece with Epiden- 

 drece, or to exclude from the former not only Acanthophippium, Calogyne 

 and PhoUdota, but several other genera at present referred to them. 



The genera with powder)^, granular, or sectile pollen, cannot be classified 

 so conveniently by modifications of thac part, but are readily divided into 

 three natural tribes by peculiarities in the anther. 



In some {Ophrea) the anther is erect, not hinged to the column, but con- 

 tinuous with it, and stands above the stigma, the pollen masses having their 

 points directed to the base of the lobes of the anther. 



In others {Arethusece) the anther is hinged to the column, upon the end 

 of which it is placed transversely like a lid. 



And, finally, in others [JVeoticce) it is also hinged to the column, but is 

 placed at its back so as to be nearly parallel with the stigmatic surface. 



If to these three we add the Cypripedece, which has two anthers, while 

 all the others have one only, we fine the order divided into seven tribes, 

 of which the following is a tabular view : — 



A TABULAR VIEW OF THE TRIBES OF ORCHIDACEiE. 



I. Anther, one only. 



A. Pollen masses waxy. 



a. No caudicula or separable stigmatic gland. 



Tribe I. — Malaxe^e, or Malaxide^e. 



b. A distinct caudicula, but no separable stigmatic gland. 



Tribe II. — Epidendre^e. 



c. A distinct caudicula, united to a deciduous stigmatic gland. 



Tribe III. — Vande^. 



B. Pollen powdery, granular, or sectile. 



a. Anther terminal, erect. 



Tribe IV. — Ophre^e, or OpHRVDEiE. 



b. Anther terminal, opercular. 



