Schlechter’s Diacrium venezuelanum, a record of the 
type of which is preserved in the Ames Herbarium, 
shows no character which cannot fall easily within the 
variability of Caularthron bilamellatum. Diacrium bival- 
vatulum, likewise, presents, according to Schlechter’s 
original description, no differences of sufficient impor- 
tance for the maintenance of it as a distinct species. Dia- 
cerium venezuelanum and D. bivalvatulum are, therefore, 
placed in synonymy under Caularthron bilamellatum. 
Type cottection: Venezuela, ‘‘Caracas,”’ Wagener s.n. (Herb. 
Rehb. 891; Herb. Ames 69055). 
CoLompia: 1842, Sinclair s.n. (Herb. Kew). 
British Honpuras: W. A. Schipp S-482 (Herb. Ames 40443). 
Cosra Rica: [Drawing of a flowering specimen and diagnosis of 
flower] Punta Arenas, February 1909, 4. & C. Brade 1265 (Type of 
D. bivalvatulum) ; Provincia de Alajuela, El Coyolar, alt. about 240 m. 
“On tree; bulbs elongate, full of ants.’’ April 1-3, 1924, P. C. 
Standley 39982 (Herb. Ames 29865); Golfo Dulce, Playa Blanca, sea 
level, February 25, 1938, M. Valerio 553 (Herb. Field Mus. 893155). 
GuatemaLa: Cult. Hort. Shiller, from Guatemala, Skinner 1458 
(Typr of FE. bigibberosum, Herb. Rehb. 893, 894; Herb. Ames 24081, 
69091); Montufor Flats, February 27, 1939, M. W. Lewis 217 (Herb. 
Ames 69926); Departamento de Izabal, between Milla 49.5 and Cris- 
tina, alt. 65-70 m. ‘‘On limbs of tree along wooded margins of prairie. 
Pseudobulb terete, pale green. Leaves thick, coriaceous, rich olive- 
green. Stem olive-green with purple suffused above and at nodes. 
Pedicels purplish. Buds orchid-colored. 8 outer sepals delicate orchid 
without, white within. 2 petals white. Lip white on upper petal and 
stigma and white on beak with pale orchid color along edge or the 
column with more lavendar.’’ J. A. Steyermark 38389 (Herb. Field 
Mus. 1043049); Departamento de Izabal, Bay of Santo Tomas, be- 
tween Escobas and Santo Tomas, alt. sea level to2 m. April 13, 1940, 
J. A, Steyermark 39341 (Herb. Field Mus. 1041145; Herb. Ames 
63752); Departamento de Izabal, shores of Lago Izab4l, opposite San 
Felipe; between San Felipe and mouth of Rio Juan Vicente, alt. 50 
m. April 19, 1940, J. 4. Steyermark 39692 (Herb. Field Mus. 1035306). 
Panama: Santa Rita Trail, February 27, 1905, J. F. Cowell 160 
(Herb. N.Y. Bot. Gard.); Cultivated from Canal Zone, Culebra, alt. 
50-100 m., April 8, 1911, H. Pittier 3406 (Herb, Ames 21797); Pa- 
tifio, southern Darien, ‘‘on cliffs along the beach,’’ February 13, 
1912, H. Pittier 5706 (Herb. N.Y. Bot. Gard.; U.S. Nat. Herb. 
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