Gyrostachys sulfurea O. Kuntze Rev. Gen. Pl. 2 
(1891) 664. 
Spiranthes bracteolaris WKriinzlin in Arkiv Bot. 14 
(1915) 7. 
A careful comparison of the descriptions of Neottia 
michuacana and N.sulphurea shows that the former is a 
slightly taller plant having cauline leaves as well as the 
strictly basal leaves of N.sulphurea. The only other dif- 
ferences appear to be a matter of degree and are trivial. 
We are inclined to refer this species to the genus 
Spiranthes rather than to Stenorrhynchus since the men- 
tum formed by the lateral sepals with the foot of the 
column is not distinct nor prominent, whereas we rely 
chiefly on the prominent mentum for the distinctness of 
Stenorrhynchus. 
Stenorrhynchus madrensis depends chiefly for its sep- 
aration from Neottia sulphurea (with which it is com- 
pared) on its quaquaversal (not secund) raceme, and its 
not urceolate perianth. A photograph of the type plant 
of Stenorrhynchus madrensis, however,shows the perianth 
of mature flowers distinctly urceolate with ringent apices 
of the segments, as described in Neottia sulphurea and 
N.michuacana. The raceme is not secund in any sense, 
but the secund or quaquaversal arrangement of dense 
racemes is a character which is certainly not of specific 
weight in the genus Spiranthes (both forms occurring in 
the widely dispersed Spiranthes gracilis (Bigel.) Beck). 
The lip of Stenorrhynchus madrensis is described as pan- 
durate, but the slight constriction above the centre of the 
lip is seen to be a variable character in plants referred to 
that species. 
Spiranthes bracteolaris Krinzl., of which we have 
examined the type number, has the ensiform or narrowly 
lanceolate basal and cauline leaves of Neottia michuacana 
and appears otherwise to agree well with that species ex- 
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