Polystachya.'] cxxxiii. ORCHiDEiE (rolfe). lU 



base. Leaves lanceolate-oblong, shortly acuminate, subobtuse, 4-8 in. 

 long, f-lf in. broad. Panicle usually ample, 3-7 in. long. Bracts 

 broadly triangular, shortly acuminate, J-1 lin. long. Pedicels 3 lin. 

 long. Flowers whitish, pale yellow, or pale pink. Dorsal sepal ovate- 

 lanceolate, acute, concave, 4 lin. long ; lateral triangular ovate, acute or 

 acuminate. Petals spathulate-lanceolate, apiculate, 3 lin. long. Lip 

 broadly unguiculate, trilobed, 3^ lin. long ; side lobes semiovate, sub- 

 obtuse; front lobe broad, ovate-semiorbicular, apiculate; disc sub- 

 glabrous, with a broad approximately round callus near the base. 

 Column stout, IJ lin. long. Chin saccate, obtuse, 3 lin. long. — P. gale- 

 riculako, E-eichb. f. Otia Bot. Hamb. ii. 111. 



ITpper Guinea. Sierra Leone : Bafodeya and Freetown, Scott- Elliot, 5903 ! 

 Lagos, Millen ! Niger Delta : Nun River ; on mangroves. Barter, 20126 ! Brass 

 Barter, 1055 ! Fernando Po, Mann, 437 ! 



Kower Guinea. Gaboon : Como River, Bates, 477 ! 



I cannot find any character by which to separate P. galericulata, Reichb. f. 



11. P. dendrobiiflora, Reichb. f. Otia Bot. Hamb. ii. 76. Pseudo- 

 bulbs fusiform. Pedicels elongate, with a long, lanceolate, free sheath 

 below, paniculate above ; branches racemose, 3-5 -flowered. Flowers as 

 large as in Dendrobium barbatum, Lindl. Sepals ligulate, acute. Petals 

 a Httle narrower. Lip rhomboid, obtuse-angled; disc furfuraceous. 

 Column angled near the stigma. Chin obtuse. — Durand & Schinz, 

 Conspect. Fl. Afr. v. 34. 



Ito-wer Guinea. Angola (ex Durand <^ Schinz). 



The author, in the original description, omits all reference to the native country 

 and afl&nity, but it is apparently closely allied to the preceding species. I have not 

 seen it. 



12. P. albescens, Eidl. in Bolet. Soc. Brot. v. 199. Stems slender, 

 5 in. long, not thickened. Leaves narrow, lanceolate-Hnear, acuminate 

 or acute, 4 in. long, 4 J lin. broad. Scapes a little shorter than the 

 longest leaves, flattened, short, about 4-flowered. Flowers as large as 

 those of P. laxijlora, Lindl., nodding, gi^eenish-white, with rose-coloured 

 labellum. Bracts lanceolate, acuminate or acute, 2 lin. long. Pedicels 

 5 lin. long, scaberulous. Dorsal sepal lanceolate, acute ; lateral 

 triangular, acute, glabrous. Petals spathulate, acute, a little shorter 

 than the sepals. Lip entire, hastate, recurved, as long as the sepals, 

 pubescent, with a linguiform, fleshy callus in the middle. Column 

 stout, short. Chin gibbous. 



laower Guinea. Island of St. Thomas : Peak of St. Thomas, about 7200 ft.. 

 Holler. 



Only known to me from the description, but said to be allied to P. rosea, Ridl. and 

 P. galerictilata, Reichb. f., and to turn black in drying. 



13. P. nigrescens, Reiidle in Journ. Bot. 1895, 200. Plant about 

 7-9 in. tall. Stems slender, elongate, about 3-5 -leaved. Leaves linear 

 or oblong-linear, subobtuse, 1 J-4 in. long, 3-4 lin. broad. Scapes sub- 

 erect, 2J-3 in. long, few-flowered. Bracts lanceolate-acuminate from a 



