THE ORCHID REVIEW. 365 
Petals unspotted or with few irregular spots. 
Petals 5—7 lin. broad. 
Petals with a few spots; cilize 1—2 lin. long. 
Dorsal sepal 1}—2} lin. long. 
Petals with a few small blotches 
26. P. venustum, Pfitz. 
Petals with a few minute spots at base 
27. P. virens, Pfitz. 
Dorsal sepal 13—2 in. long 
28. P. javanicum, Pfitz. 
Petals unspotted ; ciliz 2—3 lin. long’ 
2g. P. Dayanum, Pfitz. 
Petals about 3 lin. broad 30. P. nigritum, Pfitz. 
Petals regularly spotted to or beyond middle. 
Upper third of petals unspotted 
31. P. ciliolare, Pfitz. 
Petals spotted to apex. 
Spots small and regular. 
Petals 2 in. long ; ciliz regular } lin. long 
32. P. Curtisii, Pfitz. 
Petals 2} in. long, cilie irregular, the longer hairs 
fully 1} lin. long . 33. P. superbiens, Pfitz. 
Spots irregular, some a line or more broad 
34. P. Argus, Pfitz. 
Dorsal sepal distinctly broader than long 
35. P. purpuratum, Pfitz. 
Dorsal sepal suborbicular. 
Petals more or less deflexed. 
Petals nearly straight, 1}—2 in. long 
36. P. barbatum, Pfitz. 
Petals falcate, 2—2} in. long 37- P. callosum, Pfitz. 
Petals horizontal. . 38. P. Lawrenceanum, Pfitz. 
Petals broadly elliptical or elliptisal abkonies 3 scapes 2—6 in. high. 
Scape 2—3 in. high; flowers with yellow or cream-coloured ground. 
Flowers yellow and but little spotted 
39- P. concolor, Pfitz. 
Flowers cream-coloured and much spotted. 
Margins of petals more or less undulate 
40. P. Godefroye, Pfitz. 
z - 41. P. bellatulum, Pfitz. 
Margins ofpetals flat. 
Scape 3—6 in. high ; flowers white with a few minute purple spots 
42. P. niveum, Pfitz. 
