TROPICAL AMERICAN ORCHIDS 
times 3-ridged at the base and indistinctly 5-ridged below 
the middle, the ridges coalescing into a central fleshy fascia 
that narrows into three broad fleshy approximate keels ex¬ 
tending nearly to the apex, on each side of the central band 
closely lined in the lower and middle portions with numerous 
fleshy interneural ridges. Column slender, glabrous, about 
2.6 cm. long, arcuate. 
Dried (but matted) flowers show even larger measure¬ 
ments, the sepals being about 5.5 cm. long and 2 cm. wide. 
Vanilla latisegmenta is allied to V. inodora Schiede, but 
has broader perianth segments. V. guianensis Splitg. has 
narrower leaves, many-flowered racemes, narrower flower 
parts, and a distinctly 3-lobed lip. 
British Guiana, Upper Rupununi River, near Dada- 
nawa, Lat. 2° 45' N., J. S. de la Cruz 1404, May 29, 1922. 
“Flowers white.” (Type in Herb. Ames No. 22973); J.S. 
de la Cruz 1424, May 31, 1922. “Flowers white and yellow.”: 
Rockstone, lowland forest, H. A. Gleason 526, July 13-30, 
1921. 
Pelexia Funckiana {A. Rich. & Gal.) Schltr. in Fedde 
Repert. 15 (1918) 197 (as Funkiana). 
Spiranthes Funckiana A. Rich. & Gal. in Ann. Sci. Nat. 
ser. 3, 3 (1845) 32. 
Pelexia Pringlei FernaW in Proc. Am. Acad. 35 (1900) 
562. 
Pelexia guatemalensis Schltr. in Fedde Repert. 15 (1918) 
197. 
Duplicate material of the type collection of Pelexia 
Pringlei Fernald preserved in Herb. Ames proves, both in 
general appearance and in all measurements, to be identical 
with Spiranthes Funckiana A. Rich. & Gal.,— a true Pe¬ 
lexia,—as shown by records from the Herbarium of the 
Museum of Paris. The types of both plants, moreover, were 
collected near Jalapa, Mexico, at approximately the same 
altitude. 
Furthermore, the typical Pelexia Pringlei shows almost 
exact identity with a drawing of P. guatemalensis Schltr., as 
well as with the description of that plant. Schlechter, in his 
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