ORCHIDE.E. 635 



52. MACRADENIA, R. Br. 



"Lip free, cucullate, sessile, undivided, pointed: perigonial divisions free, spreading. 

 Column naked: rostellnm beaked: pollinaria 2, solid: caudicula clavate-linear : gland 

 ovoid." — " Scape lateral to aerial tubers, the latter 1-leaved ; flowers racemose." 



174. M. lutescens, R. Br. " Scape erect, about as long as the oblong, pointed leaves ; 

 perigonial divisions lanceolate, pointed, yellowish- and purple-variegated, exceeding the lip ; 

 lip white, purplish-spotted, obovate, with a recurved, linear, pointed, terminal appendage ; 

 column clavate: anther-bed tabulate."— Bot. Reg. t. 612. — "4" high; perigonial divisions 

 6'" long."— Hab. Trinidad (R.Br.). 



53. CRYPTARRHENA, R. Br. 



Lip " adnate at the base to the column," clawed : blade short : perigonial divisions free. 

 Column naked, margined, cucullate at the summit : " pollinaria 4 : eaudiculse linear, 2-horned, 

 gland ovoid." — Root fibrous; scape simple; leaves rosulate ; flowers racemose, small, yellow- 

 greenish, 



175. C. lunata, R. Br. "Leaves oblong-linear, pointed, exceeded by the curved, 

 slender scape ; perigonial divisions interior obovate, serrulate, exterior lateral ovate ; claw of 

 the lip linear : blade quadrate, emarginate-truncate, serrulate, little shorter than the 

 spreading horns. — Bot. Reg. 1. 153. — " Scape 6" high; flowers scarcely 4'" diam." — Hab. 

 Jamaica (R. Br.). 



176. C. pallidiflora, G. Rchb. Leaves lanceolate, bluntish, exceeded by the curved, 

 slender scape ; perigonial divisions spathulate-oblong ; claw of the lip oblong : blade 2-fid, 

 with subquadrate, serrulate lobes, much shorter than the falcate-recurved, acuminate horns. 

 — 8"-14" high ; perigone \\ m , lip 2'" long : its claw much longer than the blade. — Hab. 

 Trinidad !, Pd. ; [Mexico to Ecuador !]. 



54. ORNITHOCEPHALUS, Rook. 



Lip free, clawed or constricted above the base, subentire : perigonial divisions spreading, 

 free. Column curved, naked : rostellum long-beaked : pollinaria 4, in a cross, solid : cau- 

 dicula linear, gland ovoid. — Root fibrous ; scapes or scape-like axillary peduncles simple : 

 leaves equitant ; flowers racemose, yellowish-green, small. 



177. O. gladiatus, Hook. (sec. Brad/.). Root densely pilose; leaves lanceolate- 

 oblong, bluntish, slightly falcate, little exceeded by the glabrous, curved scapes j flowers in a 

 short raceme : bracts glabrous, clasping-deltoid ; perigonial divisions elliptical, interior 

 obovate, half as loug as the lip ; lip very shortly clawed, hastate-oblong, pointed, with a 

 semilunar callus between the basilar auricles. — O. Ibis, G. Rchb.!: I regard this as the 

 original Trinidad species, well known to Dr. Bradford, though I did not find original speci- 

 mens in Herb. Hook.; his figure (Hook. Exot. t. 127), according to a copy kindly commu- 

 nicated by G. Rchb., disagrees much by a long, reflexed, terminal appendage to the lip 

 (perhaps from monstrosity) .—Leaves 1"-1£" long, 2"'-3'" broad; lip 2"' long.— Hab. 

 Trinidad!, Cr., Brad/., very abundant in all parts of the island, on trees. 



178. O. Cruegeri, G.Rchb.! Root glabrous; leaves oblong-lanceolate, mucronatr, 

 little exceeded by the hispidulous scape ; flowers in a short raceme : bracts deltoid or ovate, 

 filiate or hispidulous ; perigonial divisions obovate or obovate-rouudish, srrrulate, half m 

 long as the lip ; lip very shortly clawed, dilated-roundish and callous to the constricted 

 middle: upper part obovate-roundish, emarginate, serrulate.— Leaves 1 long, 3 -5 

 broad ; lip 1£'" long.— Hab. Trinidad !, Cr., Brad/. 



55. TRIZEUXIS, Lindl. 



Lip free or " nearly so," entire, concave, pointed: perigonial divisions connivent, ex- 

 terior lateral cohering, superior and 2 interior cohering at the base. Column^ naked, 



