168 TRANSACTIONS OF THE [Sess. lxxxi 



always shorter than the corolla. The ovary is narrow, 

 cylindric, or somewhat conoid, black on the surface and 

 usually grooved, varying in length from 5-7 mm. It 

 may be glabrous {Rh. erithnum, RJl gyonnanthum, Rh. 

 hylothreptum (sometimes floccose), Rh. lukiangense. Rh. 

 tanastyluvi) ; puberulous {RJt. araiopliyllwin, Rh. cera- 

 ceum) ; floccose {Rh. anfJiosphaeriwi, R/t. spanotrichuin) ; 

 glandular (Rli. agastum, RIt. irroratum); glandular above 

 floccose below (RJi. adenostemonuin) ; floccose so densely as 

 to conceal an under glandular layer (i?A. iJogonostylum) ; 

 gland-setose {Rh. onengtszense). In four species {Rh. 

 adenostemonum, Rh. agasfwm, Rh. irrorattun, Rh. inengtsz- 

 ense) the style is glandular throughout, in Rh. pogono- 

 stylum it is densely floccose as well as glandular through- 

 out ; in all the others glabrous. In Rh. anthosphaerum the 

 flocks of the ovary sometimes spread on to the base of the 

 style ; only a few, however, appear there, and the style is 

 rightly described as glabrous. Usually the style expands 

 slightly, and gi-adually passes into the lobulate stigma 

 seated on its summit and not wider than the style itself, 

 but in Rh. agastum the stigma is relatively massive and 

 forms a broad discoid body somewhat spongy which over- 

 hangs the sides of the style. 



I have seen fruit and seed only in lilt. j>ogonostylura. 

 The capsule is large and thick, some 4 cm. long by 1 cm. in 

 diameter, and is slightly curved, black, and showing the 

 remains of the ovarian indumentum. A fruiting specimen 

 of another undescribed undoubted member of the series 

 suggests this is not the only type. The seeds are flattened 

 oblong, about 3 mm. by 1 mm., with a wing all round and 

 a white chalazal crest. 



The species seem to fall into four small alliances within 

 the series : — 



1. Irroratum type — plants with rigid, pointed leaves and white or 



pink flowers — includes : 



lik. adenodemonum, Eh. irroratum, Rh. pogonostylum. 



2. G;imna'idli.um type — ])lants with narrow, papery (not in all), 



pointed leaves and white or red flowers — includes : 



Jill,. araiophijUum, Ilh. (jym,nunthum, llli. mengtszense, lih. 

 spanotrichiim, Rh. tanaslylum. 



3. AnthoHpkaerum type — 2Ji'''"'-s witli broad, thick, 2)ai'chnienty, jjointed 



leaves and red flowers — includes: 



Rh. anthosplMerum, Rh. ceraceum, Rh. hylothreptum, Rh. 

 lukiangense. 



