THE ORCHID REVIEW. 
to. P. Chamberlainianum, Pfitz. 
Dorsal sepal and petals variously lined with brown 
Dorsal sepal and petals not lined with brown 
11. P. Victoria-Mariz, Rolfe. 
Flowers normally solitary, or twin in luxuriant specimens 
Petals straight, or nearly so 
Upper margin of petals nearly or quite flat 
Scape and ovary villose. 
Dorsal sepal unspotted 12. P, villosum, Pfitz. 
Dorsal sepal bearing many blackish spots 
13. P. Boxallii, Pfitz. 
Scape and ovate pubescent 
Dorsal sepal elliptical- or ovate-oblong. 
Dorsal sepal 2—2}in. long 14. P. insigne, Pfitz 
Dorsal sepal 1}—13 in. long. 
Dorsal sepal without dark median band 
15. P. Exul, Rolfe. 
Dorsal sepal with blackish-purple median band 
16. P. Druryi, Pfitz. 
17. P. Charlesworthii, Pfitz. 
Dorsal sepal orbicular 
Upper margin of petals strongly crisped or undulate 
Dorsal sepal orbicular, as long as petals 
18. P. Spicerianum, Pfitz. 
Dorsal sepal ovate, much shorter than petals 
1g. P. hirsutissimum, Pfitz. 
20. P. Fairrieanum, Pfitz. 
Petals falcate : 
Leaves elliptical or oblong, Sally tessellated with two shades of green. 
Petals linear-oblong ; scape ${—1} ft. high. 
Dorsal sepal ovate. 
Staminode orbicular or oblong; dorsal sepal not striped 
Staminode 5—7 lin. broad 21. P. Hookere, Pfitz. 
Staminode 3—4 lin. broad. 
Dorsal sepal longer than broad, subacute 
Leaves strongly tessellated - 22. P. Bullenianum, Pfitz. 
Leaves obscurely tessellated 23. P. Appletonianum, Rolfe. 
Dorsal sepal as broad as long, obtuse 
24. P. Mastersianum, Pfitz. 
Staminode broader than long ; dorsal sepal striped with green or 
purple. 
+ 25. P. tonsum, Pfitz. 
Petals not ciliate . - 
Petals ciliate. 
Dersal sepal as long or longer than broad. 
