194 TRANSACTIONS OF THE [Sess. lxxxi 



long ; filaments hardh^ widened at base and above the base 

 provided with a few short hairs they ai-e not glabrous. 

 Disk glabrous. Gynaeceum about 4 cm. long exceeding 

 stamens; ovary cylindric about 7 mm. long very narrow 

 about 1'75 mm. in diameter o-rooved shinino- brown-black 

 sometimes papillate, glabrous ; style glabrous hardly ex- 

 panding beneath the lobulate small stigma. 



W.N.W. Yunnan:— N.W. of Tseku. Mekong-Salween 

 divide. Alt. 13,000 ft. Lat. 28° 12' N. Open rocky 

 situations. Shrub of 3-6 ft. Flowers rose with crimson 

 markings. G. Forrest. No. 5071. Au tr. 1904. 



W.N.W. Yunnan: — Tseku. Monbeig. No. 4. Herb. Kew. 



In Herb. Kew there is a good sheet of this under " No. 4 

 Monbeig," collected at Tseku. Our material at Edinburgh 

 from Forrest, though scanty, — only a twig with five leaves and 

 four flowers — is that upon which Diels founded his species. 

 Through the kindness of the Director of Kew I have had 

 for examination Monbeig's specimen No. 4, and I am able 

 to say that Forrest's specimen is part of the same collecting. 

 In Forrest's early collections are specimens of several 

 different species from Tseku which were of the same 

 collecting as Pere Monbeig's, and this is one of them. 

 Hemsley and Wilson ^ referred Monbeig's No. 4 to Rh. 

 irroratunn, Franch. Later, Relider and Wilson ^ correctly 

 placed it in Rh. gymnanfJium. Like most of the Irroratum 

 series this species appears at .sight to be quite glabrous, 

 but the evidence of an early floccose condition of axes and 

 leaf are present and the vestiges vary in the degree of their 

 prominence. Except for the glands which tip some of the 

 fringe lobes of the calyx, I have not seen glands upon this 

 plant in its mature state. I have described the disk as 

 glabrous, but in one flower I saw traces of a few very 

 fine short hairs. 



I may add a word about the leaf surfaces. The upper is 

 typically glossy from its layer of wax. It is easy to dis- 

 solve this in benzol and to remove it, leaving an opaque 

 mat surface. In some of the dried leaves the upper surface 

 is mat — pale and glaucous or olive-green. This seems to 

 be due to a loosening of the wax layer. The under surface 



' In Kew Bulletin (1910), 113. 



- Plantae Wilsonianae, i (1913), 539. 



