832 MR. H. N. RIDLEY ON NEW AND 
racemo multifloro ; floribus in apice scapi aggregatis, bracteis lan- 
ceolatis acuminatis hirtis, quam ovarium duplo brevioribus, sepalo 
superne lanceolato basi gibboso apice excurvo, lateralibus inæqui- 
lateralibus oblongis obtusis curvis, petalis angustioribus, labello 
semiunciali trilobo basi angusto longo, lobis lateralibus angustis 
linearibus obtusis ineurvis, lobo medio spathulato emarginato, 
ealeari longo gracili curvo clavato processibus stigmaticis longis 
linearibus oblongis, caudiculis polliniorum capilliformibus 13 
millim. longis, ovario unciali recto gracili hispido; capsula fusi- 
formi. 
Imarina, Ankafana.—Deans Cowan. Vahi-taki-fotsa inco- 
larum. 
This plant is remarkable for the shape of the posterior sepal, 
which is gibbous at the base, the dilated portion projecting behind 
the column. The lateral sepals are in:quilateral; and all are 
upeurved at the apex, suggesting somewhat the shape of the 
the petals of some leguminous plant. The spur is long and slender, 
dilated towards the extremity, and then tapering again to a point. 
The flowers are rather large and more numerous than usual in 
this genus. 
C. GRANDIFLORA, n. sp. Herba terrestris, tuberibus oblongis 
lanatis, folis vaginantibus, radicali lanceolato patente triun- 
ciali, caulinis scapum vaginantibus erectis, scapo 4-unciali 1-2 
flores magnos ferente, sepalis oblongo-lanceolatis viridibus rufo- 
maculatis, petalis angustioribus albis, labello lato quadrilobato, 
lobis lateralibus obovatis, medio in duos lobos late divergentes 
fisso, calcari longo apice subito dilatato, columna brevissima, 
processibus stigmaticis gracilibus curvis. 
Var. a. purpurea, labello purpureo basi maculata, inodora. 
Var. fj. albata, labello albo basi purpurea, odorata. 
Common on damp rocks, Ankafana.—Deans Cowan. 
This plant is distinguished by the one or two conspicuous flowers, 
much larger than any of the others in the genus. The tubers 
are 13 inch long ; the leaves are all appressed to the stem, but one 
radical one, which is recurved; they are dark green with brown 
spots. The flower varies in colour considerably ; apparently the 
commoner form has green sepals with dark red spots and white 
petals; the lip is purple with darker spots at the base, and 
2 inches long by 1 in diameter. In the other form the lip 
is white with a purple blotch at the base andafew pink spots 
