were already known to Reichenbach, who also regarded them as 
a representative of a new genus. 
I consider the position of the genus Manniella to be among 
the Spiranthinae. Reichenbach’s original statement that the 
column has two auricles at the apex is based on a wrong obser- 
vation. The clinandrium, /.e., the anther bed, in Maniella con- 
sists of a square, basket-like structure with the erect sides free 
from one another and from the sides of the stigmatic cavity; the 
bottom of the clinandrium is flat, not infundibuliform as in the 
rest of the Spiranthinae. Apart from this unique feature, 
Maniella agrees with the remainder of the Spiranthinae. 
When I described Manniella americana in 1962, I did it on 
account of the great similarity in the structure of the sepaline 
tube found in this species and in M. Gustavi, the type of the 
genus from West Africa. Since that time I have received good 
material of both species which has enabled me to clarify the 
status of M. americana. The plants are native to the Guyana 
Highlands, and commonly autogamous. They have a short, 
decumbent rhizome, and an infundibuliform clinandrium. Spiran- 
thes bifida, also having the same distribution, appears to be 
congeneric. These two species together comprise now the genus 
Helonoma. Incidentally Spiranthes bifida is based on specimens 
with true peloric flowers in addition to its being autogamous. 
Because of the manner in which Schlechter circumscribed his 
genus Deiregyne, it must be typified by D. chloreaeformis. The 
other species included in it by him are now transferred either to 
Aulosepalum or to Gularia. Pamela Balogh’s contention that 
they are all referable to Schiedeella (Orquidea, Mex. 8: 37-40, 
1981), presumably because they all have translucent, charta- 
ceous sheaths covering the scapes, suggests her strong preference 
for gross appearances over diagnostic floral details. Deiregyne at 
a future time may be divided into two genera on account of the 
nature of the rostellum. The group containing the type of the 
genus has a blunt rostellum with revolute sides; the other group 
is characterized by an acuminate rostellum without revolute 
sides. 
Since Stenorrhynchos is typified by the widespread S. specio- 
sum, a number of south Brazilian elements no longer can be 
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