Pflanzenr. IV. 50, pt. 2 (Heft 80) (1922) 310, fig. 27 
D, a-¢: 
On the basis of the plate of S. costaricensis (in Bot. 
Mag. l.c.) and of the description, there appears to be no 
doubt that it should be referred to the concept S. guate- 
malensis, as described and as represented in the Ames 
Herbarium by an analytical drawing made under the 
supervision of Dr. Schlechter. In S. costaricensis the 
leaves are recorded as somewhat broader and the sepals 
and petals somewhat longer than in S. guatemalensis, and 
the lip is described as minutely apiculate or acute (not 
obtuse) with the basal callus dentiform and subobtuse 
(not triangular-linear). A series of Costa Rican specimens 
referred to S.costaricensis have an obtuse lip commonly 
minutely apiculate and the basal callus varies from den- 
tiform-retuse or dentiform-obtuse to dentiform linear- 
triangular. 
It is also certain that 8. potkilostaha, which is repre- 
sented in the Ames Herbarium by a photograph of the 
type with analytical drawings, must be synonymous with 
S. guatemalensis since its only differences are a slightly 
narrower lip than in the latter species and a “‘straight”’ 
column. 
Schlechter (in Fedde Repert. Beihefte 19 (1923) 68) 
considered S. poikilostaliv to be synonymous with S.cos- 
taricensis and suspected that both were referable to S. 
guatemalensis. 
It is unfortunate that the description of 8. gwatema- 
lensis cites no color for the flowers, those of the other two 
forms being greenish yellow blotched with reddish brown 
or purple. 
Although the species appears to be frequent in Costa 
Rica and the Chiriqui Province of Panama, it has been 
but once recorded from Guatemala. 
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