108 cxxxiii. ORCHiDE^ (rolfe). [Polystachya, 



side lobes triangular-oblong, obtuse ; front lobe rather larger, ovate, 

 obtuse ; disc carinate, farinaceous, puberulous. Column stout, 1 lin. 

 long. Chin saccate, obtuse, 2^-3 lin. long. — Rolfe in Gard. Chron. 

 1888, iii. 648. P. affinis, Lindf. in Bot. Reg. 1839, Misc. 35 (not of 

 Gen. & Sp. Orch.) ; Reichb. f. in Walp. Ann. vi. 642. 



ITpper Guinea. Sierra Leone : Barter ! cultivated specimen, Loddiges ! Sugar- 

 loaf Mountain, common on mossy rocks and old logs on the higher part, Scott-Elliot^ 

 5822 ! Cameroons : Ambas Bay, Lord Scarborough. 



Lindley confounded this species with his P. affinis, and then redescribed P. affinis 

 as P. bracteosa. 



2. "P. ftt.rinosB.y ICrdnzl. in Engl. Jahrb. xviL 51. Plant 1-1 1^ ft. 

 high. Pseqdobulbs cylindric, elongate, about 6-8-leaved. Leaves 

 oblong, linear, bidentate, 3-5 in. long, 3-5 lin. wide. Racemes simple, 

 many-floweredj lJ-3 in. long. Bracts triangular, apiculate, J-f lin. 

 long. Pedicels 4 Jin. long. Flowers white. Dorsal sepal ovate-oblong, 

 obtuse, 1 J lin. long ; lateral very shortly and broadly triangular, obtuse 

 or apiculate. Petals elliptic-oblong, obtuse, IJ lin. long. Lip 3 J lin. 

 long, trilobed ; side lobes ovate-oblong, obtuse, small ; front lobe con- 

 duplicate and deeply keeled behind, oblong, obtuse ; disc densely pul- 

 verulous with an oblong keel above the base. Column stout, 1 lin. long. 

 Chin oblong, obtuse, 3 Tin. long. 



Upper Guinea. Cameroons : Mountains at 4000-5000 ft., Man7i, 1339 ! 2115 ! 

 Buea, 3500 ft., Prenss, 1064. 



3. P. bifida, Lindl, in Journ. lAnn, Soc. vi. 129. Plant about 

 1 ft. high. Stem elongate, cylindric, slender, about 5-6-leaved. 

 Leaves Hnear, subobtuse, 2J-4J in. long, 2-3 lin. broad. Racemes 

 simple, erect or nodding, 1-1 J in. long, 5-7-flowered. Bracts triangular, 

 acute, J- J lin. long. Pedicels 3-4 lin. long. Dorsal sepal ovate, obtuse, 

 concave, 1| lin. long; lateral broadly triangular, obtuse. Petals linear, 

 obtuse, IJ lin. long, membranous. Lip linear-oblong, trilobed, 2 J lin. 

 long ; side lobes oblong, obtuse, small ; front lobe oblong, fleshy, con- 

 duplicate, obtuse or tridentate, keeled below ; disc with a thick puberu- 

 lous, apiculate cushion at the base. Column, stout, f lin. long. Chin 

 saccate-oblong, obtuse, 2J lin. long. — Kranzl. in Engl. Jahrb. xxii. 23. 



Upper Guinea. Cameroon Mountains, Preuss ! Fernando Vo, 4000 ft., Mantiy 

 649! 



4. P. ensifolia, Lindl. in Journ. Linn. Soc. vi. 129. Plant 1-1^ 

 ft. high. Stems subcylindric, elongate, slightly flexuous, 5-7-leaved. 

 Leaves linear-lanceolate, acuminate, 3-8 in. long, 5-7 lin. broad. Scapes 

 simple, or rarely slightly branched, erect or nodding, lJ-2 in. long. 

 Bracts triangular, acuminate, lJ-2 in. long. Pedicels 2 lin. long. 

 Flowers yeUow. Dorsal s^pal oblong-lanceolate, acute, concave, 2 lin. 

 long ; lateral triangular, acuminate. Petals spathulate-lanceolate, 

 subacute. If lin. long. Lip hastately trilobed, 2 lin. long; side lobes 

 triangular- oblong, subobtuse, short ; front lobe obcordate-oblong, 

 apiculate. Column stout, 1 lin. long. Chin saccate-oblong, obtuse, 



