supra laxe paucifloris: floribus vulgo secundis; bracteis 
late triangularibus, acutis, pedicellis multo brevioribus ; 
sepalo postico elliptico, obtusiusculo, valde concavo, 
usque ad 15 mm. longo, 6 mm. lato; sepalis lateralibus 
inter se fere usque ad apicem in synsepalo connatis, 
cochleato-cymbiformibus, apice divaricatim bidentatis, 
usque ad 16 mm. longis, 7 mm. latis; petalis late ellip- 
ticis vel obovatis, obtusiusculis, reflexis, usque ad 13 mm. 
longis, 8 mm. latis; labello distincte lobulato, lobis later- 
alibus auriculatis vel subquadratis, lobo intermedio trans- 
verse reniformi, bilobo, antice vulgo sinuato vel promi- 
nenter exciso, basi valde cordato, margine undulato, disco 
tuberculis 5-nis, cariniformibus elevatis ornatis: toto la- 
bello usque ad 25 mm. longo, 30 mm. lato, basin inter 
lobos laterales 12 mm. lato; columna humili, 6 mm. 
alta; clinandrio cucullato; ovario pedicellato ca. 15-20 
mm. longo. 
Observation: The rather abundant material of this species present 
in the various herbaria has been confused repeatedly with O. cuculla- 
tum Lindl. The specimens belonging to this new species can readily 
be differentiated by the shape of the callus which consists of 5 tuber- 
cles or humps arranged in three rows; 2 humps on each side and a 
fifth one in the middle which isshorter than the lateral ones. Although 
the structure of the calli is similar to O. sanguinolentum ( Lindl.) Schltr., 
the flowers of the latter species differ, in addition to being much 
smaller, in the construction of the lip which is pandurate and the 
midlobe of lip is truncate to cuneate at the base. 
The original error dates back to Lindley who confused this appar- 
ently distinct species with O. cucu//atum in Paxton’s Flower Garden. 
It should be noted that the plate in Paxton’s Flower Garden is based 
on an abnormal specimen, showing a terminal inflorescence. 
Illustrations: Paxton Fl. Gard. 3: t. 87, 1852, as O. cucullatum; 
Fl. des Serres 8: t. 853, 1853, as O. cucullatum; ibid. 23: t. 2457, 
1880, as O. cucullatum; Veiteh, Man. Orch. Pl., pt. 8: 30, 1892, as 
O. cucullatum; Amer. Orch. Soc. Bull. 27: 750, 1958; ibid. 44: 581, 
1975, as O. cucullatum; Dunsterville & Garay, Venez. Orch. Ill. 5: 
220, 1972, Fig. A only, as O. andigenum; Foldats in Lasser, Flora 
Venez. Orch. 15(5): 360, 1970, dotted outline of lip only, as O. 
nubigenum., 
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