general habit and which immediately suggested Queket- 
tia, another genus of the subtribe Capanemieae and 
known only from the Guianas. I consequently investi- 
gated all of the genera and species of the Capanemieae, 
and I am now convinced of the identity of my material 
with that of the concept Hybochilus Huebneri. 
According to Schlechter’s system, such features as an 
incumbent anther and auricles which are a continuation 
of the clinandrium characterize the Capanemieae. A com- 
pletely dorsal anther and the presence of auricles on the 
column which enfold the stigmatic cavity are characters 
of the monogeneric subtribe Papperitzieae; these char- 
acters are clearly observable in Hybochilus Huebneri. 
The structure of the column, however, is much more 
complicated than in Papperitzia. There are two pairs 
of lobes: one pair is located in front of the column, with 
their parallel sides enclosing the stigma, the lower mar- 
gins being completely connate to form a shallow, cup- 
like cavity immediately beneath the stigmatic surface; 
the other pair of lobes terminate the column. At first, 
these are parallel and enclose the lower portion of the 
anther. When the anther is removed they open up slight- 
ly and become spirally twisted. It is hard to state the 
real function of these lobes, since we have no field obser- 
vations. It appears, however, that so long as the flowers 
are not visited by pollinating insects they remain fairly 
connivent, but after the removal of pollinia they open up 
slightly. I believe that these auricles protect the vis- 
cosity of the stigma and pollen-gland from rapid desic- 
cation. 
In view of these dissimilarities, which I consider to be 
of basic importance in the differentiation of subtribes as 
well as of genera within the subtribes, I believe that Hy- 
bochilus Huebneri represents a distinct genus which 
should be placed in the Papperitzieae. 
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