1916-17.] BOTAXICAL SOCIETY OF EDINBURGH 177 



along with Rli. gyinnanthiim and Rh. irroratum, and it is 

 a very near ally of Rh. irrurahtin itself. Glandular stems, 

 petioles, pedicels, and styles belong to both species; the 

 points of difference between them are these : — The inflor- 

 escence rhachis has apparently (but see p. 164) floccose and 

 adpressed hairs with glands, in RJl. irroratum glands only 

 are present ; the flower in Rh. adenostemonum has pedicels 

 seldom over 1 cm. long ; those of Rh. irroratum are over 

 1 cm. long ; the calyx in Rh. adenosfenionum has the cup 

 sparingly glandular and the back of the lobes more or less 

 puberulous, with a few stray glands particularly at the 

 base and now and then one in the margin ; in RJt. 

 irroratum the calyx-cup is densely glandular and the 

 lobes gland-fringed, there are no hairs ; the corolla and 

 stamens show a curious antithesis in character — Rli. 

 adenostemonum has a funnel-shaped corolla, glabrous, quite 

 eglandular on the outside and densely pubescent inside, 

 and the staminal filaments are conspicuously puberulous 

 to the middle and beyond it, and show in addition a 

 remarkable development of small, red, shortly-stalked 

 glands, in some cases up to near the base of the anther 

 (hence its specific name) ; RJt. irroratum has a tubular- 

 campanulate corolla which has a development of small, 

 short-stalked, red glands on the outside, particularly along 

 the midribs of the petals, inside it is densely puberulous 

 and the stamens are finel}^ puberulous at the base only, 

 and have no glands ; then the disk in Rh. adenostemonura 

 is pubescent, in Rli. irroratum glabrous, and the ovary, 

 glandular in both, has in Rh. adenostemonuin floccose hairs 

 as well all over or at the base only. The characters 

 I have mentioned seem to be constant in Rh. irroratum in 

 a large series of specimens I have examined from different 

 areas of its wide distribution, from Tali to the Chung- 

 tien plateau. Of Rh. adenostemonum I have only seen 

 specimens from one locality, one sheet of them. No. 11,067 

 in the Kew Herbarium, kindly lent to me by the Director 

 of Kew, and one sheet. No. 11,067a in the Edinburgh 

 Herbarium. The sum of the differential characters, fluctuat- 

 ing though some of them may be in other species, is to me 

 conclusive against conspecificness of the two plants. Of 

 individual characters, that of the gland development on 



