OECHIDE^. 635 



52. -MACKADENIA, R. Br. 



"Z2> free, cHcuUate, sessile, undivided, pointed: perigonial divisions free, spreading. 

 Column naked: rostellum beaked: pollinaria 2, solid: caudicvda clavate-linear : gland 

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



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

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

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

 column clavate : anther-bed lobulate."— Soif. Rea. t. 612.—" 4" high : perigonial divisions 

 6'" long."— Hab. Trinidad {R. Br.). b • i s 



53. CRYPTAERHENA, R. Br. 



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

 Column naked, margined, cucuUate at the summit : " pollinaria 4 : caudiculee linear, 2-homed, 

 gland ovoid."— Root /Sroa*; scape sim^ile ; leaves rosulate ; flowers racemose, small, yellow. 



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

 slender scape ; perigonial divisions interior oliovate, serrulate, exte'rior lateral ovate ; claw of 

 the lip linear: blade quadrate, emarginate-tmncate, 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 i-fid, 

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

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

 Trinidad I, Fd. ; [Mexico to Ecuador !]. 



54. ORNITHOCEPHALUS, ffooi. 



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 lineal', gland ovoid. — 'Root fibrous ; scapes or scape-Wee axillary peduncles simple : 

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



177. O. gladiatus. Hook. (sec. Bradf.). Root densely pilose; leaves lanceolate- 

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

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

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

 semilunar callus between the basilar auricles. — O. Ibis, O. Rchb. .'.- 1 regard this as the 

 original Trinidad species, well known to Dr. Bradford, though 1 did not find original speci- 

 mens in Herb. Hook. ; his figure (Hook. Exot. t. 137), according to a copy kindly commu- 

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

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

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



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

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

 ciliate or hispidulous ; perigonial divisions obovate or obovate-roundish, serrulate, half as 

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

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

 broad ; lip 1^"' long.— Hab. Trinidad I, Cr., Bradf. 



55. TRIZEUXIS, Undl, 



I4p free or " nearly so," entire, concave, pointed : perigonial divisions connivent, ex- 

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



2 T 



