mid-lobe is recurved tn natural position, its exact shape 
is Capable of various interpretations. 
The plant named Polystachya eeuadorensis Schltr. is 
undoubtedly referable to P. cerea, having exactly the 
form and proportions of P. minor. 
Polystachya panamensis, also represented in the Ames 
Herbarium by a drawing made under the supervision of 
Dr. Schlechter, appears to be inseparable from the P. 
minor form. ‘The only differences are that its sepals and 
petals are described as obtuse and the basal callus on the 
lip as trilobulate. 
This widespread and variable species extends from 
Mexico through Central America to Panama and the 
West Indies and to the northern portions of South 
America. 
Polystachya nana (Pocpp. & Endl.) Reichenbach fil- 
ius in Walpers Ann. 6 (1868) 638. 
Eneycha nana Poeppig & Endlicher Nov. Gen. ac Sp. 
PI. 2 (1888) 10, t. 113 A. 
Stelis foliosa Lindley in Ann. & Mag. Nat. Hist. 2 
(1839) 830, t. 17. 
Polystachya foliosa Reichenbach filius in) Walpers 
Ann. 6 (1863) 640——Cogniaux in Martius Fl. Bras. 3, 
pt. 4 (1895) 816. 
Dendrorchis nana O. Kuntze Rev. Gen. Pl. 2 (1891) 
659. 
The concept Stelis foliosa is described and figured as 
having the sepals equally large, whereas H/ncyclia nana 
has the dorsal sepal distinctly narrower than the lateral 
sepals. However, the dorsal sepal of Polystachya foliosa 
is described by Cogniaux and invariably appears, in all 
of the specimens which IL have seen referred to that spe- 
cies from the West Indies and South America, as dis- 
tinctly narrower than the lateral sepals. 
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