SEPTEMBER, 1922.] THE ORCHID REVIEW. 267 
CHYSIS BRACTESCENS. 
HE genus Chysis was founded by Lindley on C. aurea in 1537. 
-yéars later C. levis and C. bractescens were described; and in 1841 
the latter was figured in the Botanical Register, when Lindley remarked that 
of lee eee Pee . . 
in this, as in most other Orchidacez, the most exact attention should be 
lum, for they furnish the 
Three 
pent 
paid to the markings and elevations of the labe 
BRACTESCENS. 
CHYSIS 
most constant and exact characters for distinguishing species. 
original Chysis aurea there are five principal ridges on the hypoc 
three minor oneson each side, all downy, and diverging. 
there are five equal ridges only, all smooth and parallel ; 
there are three large somewhat confluent ridges, and one smaller o1 
pad 
Side, the whole being smooth.” 
In the 
hilium, and 
In C. bractescens 
and in C. levis, 
each 
