184 THE ORCHID REVIEW. [JUNE, 1923. 
many-flowered scapes, and the smaller size of the species hitherto known as 
Promenzas and Kefersteinias. They are spread over the South American 
continent from the cooler parts of southern Brazil to the isthmus of 
Panama: and also over Central America, southern Mexico, and the West 
Indies. 
The following sectional divisions are proposed by Bentham, of which we 
give the most obvious characters :-— 
I. EvzycoreTaLum. Scapes many-flowered; the labellum broad with 
ZYGOPETALUM BURTII. 
its crest thick, entire or lobed. This includes the type species Z. Mackay], 
also Z. Burkei, Z. maxillare, Z. graminifolium, and others. 
Il. ZyGosEPALUM. Scapes few-flowered, sepals and petals narrowly 
acuminated. Z. rostratum and Z. Kegelii, the latter not known in 
cultivation. 
III. HuntTrteya. Scapes one-flowered; the labellum clawed and its 
crest distinctly fimbriated; the column broad and crenulate at the apex- 
Z. Meleagris, Z. Burtii. 
IV. Botrea. Scapes one-flowered; sepals and petals broad; the 
