170 TRANSACTIONS OF THE [Sess. lxxxi 



Calyx densely floccose and glandular. Style 

 floccose and glandular. 

 Corolla pink. 



Ovary densely floccose and with glands. Pedi- 

 cel under 1 cm. floccose and glandular. 

 Corolla tubular-campanulate glandular and 

 puberulous outside, puberulous inside. 

 Stamens pubescent to middle and beyond 

 eglandular. Inflorescence rliachis floc- 

 cose. Petiole floccose glabrescent . pogonostylum 



Gymnanthum. 

 These are plants with thin twigs and lanceolate papy- 

 raceous leaves, usually narrow (sometimes broad, Rh. tana- 

 stylutn) even cuneate at the base, with marginal un- 

 dulation fairly distinct but only slightly roughened from 

 fallen flocks. Wax is much developed, making the under 

 surface somewhat glossy, and in Rh. gymnanthuTn the 

 upper surface quite glossy. Stem and petioles may be 

 floccose and glabrescent, gland-glabrescent or gland-setose. 

 This, except for the special development of gland-setae in 

 Rh. mengtszense, is a conspicuously eglandular group — 

 glands are absent from pedicels, calyx, ovary, and style. 

 The flowers, white, red, or deep crimson, are in few (about 

 8-) flowered raceme-umbels with thin rhachis, have 5-lobed 

 corolla, glabrous inside and out, and 10 stamens, puberulous 

 save in Rh. spanotricJium and Rh. tanastylum. The 

 species are absent from the Tali-Chungtien area, but range 

 from N.W. of Tseku in the Salween basin .southwards to E. 

 Upper Burma and the Shweli-Salween divide at Tengyueh 

 in W. Yunnan, and then turn up at Mengtsz in the S.E. 



KEY TO THE SPECIES. 



Leaves papyraceous (sometimes thicker), lanceolate or 

 oblanceolate, base u.sua]ly narrow and cuneate, 

 one or both surfaces somewhat glo.ssy, margin 

 inconspicuously undulate and roughened ; 

 peti(fle floccose or gland-glabrescent or per- 

 sistently gland-setose. 



Corolla 5-lobed, glalirous outside and in. Stamens 10. 

 Style glabrous, rarely glandular. 

 Calyx glalnous flock-fringed. Corolla blotched and 

 spotted. Petiole floccose glabre.scent. Style 

 glabrous. 

 Corolla white. Ovary puberulous. Pedicel 1 cm. 

 or more glabrous. 

 Corolla openly canipanulate. Stamens pubes- 

 cent. Inflorescence rhachis floccose. Leaf 

 mat alcove, subglossy beneath . . . araiophyllum 



