bach's characters, though do inure than may fairly be put 

 down to variations from a type common to both, 



M. gibbi rosa is a native of New Grenada, whence it was 

 sent to Messrs. Witch by their collector, Mr. Wallis. The 

 species here figured flowered in the Royal Gardens in 

 March, 1870. Though not one of the showy species, it has 

 the advantage of flowering nearly all the year round. 



Desce. Kootstock slender, creeping. Leaves solitary, 

 three to five inches long including the petiole, coriaceous, 

 oblong- obovate or lanceolate, obtuse, channelled ; nerves 

 very obscure ; basal sheath short, tubular ; petiole very 

 variable in length. Peduncle six to ten inches long, slender, 

 erect, bearing a lax erect raceme of four to eight distant 

 flowers, surface covered with warts as are the rachis of 

 the raceme, pedicels and ovary; sheaths very few, distant, 

 and bracts tubular, membranous, appressed, truncate ; 

 pedicels half an inch long, deflexed at the tip; flowers two 

 and a half to three inches across the lateral sepals. Dorsal 

 »< pal boat-shaped, dull red with strong greenish ribs, 

 ending in a filiform red tail five times as long as the lamina; 

 lateral sepals connate to the middle of the blade in a 

 concave green ribbed lamina, then each spreading out 

 horizontally into a thick oblong yellow blade spotted with 

 red which contracts into a narrow yellowish tail. Petals 

 very small, rhomboidly oblong, yellow, two nerved, tips 

 callous. Lip very small, one-eighth of an inch long, con- 

 sisting of an oblong obovate lamina with serrulate edges, 

 and a small serrulate terminal lobe ; the basal portion of 

 the lamina is membranous and faintly three-nerved, the 

 distal end is fleshy and granulate with a raised sausage- 

 shaped fleshy callus towards either margin, and the terminal 

 lobe is rounded-obcordate, and narrower than the lamina. 

 Column slender, suddenly expanding into a winged mem- 

 branous hood. — /. D. H. 



Fig. 1, Portion of flower laid open, showing the bases of the dorsal and lateral 

 sepals, lip and column ; 2, lip; 3, tip of ovaiy, petals and column ; 4, front view 

 ol column ; 5, outer, aud 6, inner view of anther ; — all enlarged. 



