II4 BALFOUR—NEW SPECIES OF RHODODENDRON. 
Rh. invictum, Balf. f. et Farrer 
(1917) 
Rh. oporinum, Balf. f. et Ward- 
(1917). 
Rh. pholidotum, Balf. f. et 
W. W. Sm. (1917). 
E.N.W. Yunnan: Mts. in 
N.E. of Yangtze bend, 
11,000 ft.; Likiang Range, 
N.W. flank, 12,000-13,000 
ft. (Forrest.) 
Kansu : Siku-Satanee Ranges, 
8000-9000 ft. (Farrer and 
Purdom.) 
E. Upper Burma: Wulaw 
Pass, Valley of Naung- 
Chaung, 1I1,000-12,000 ft. 
(Ward.) . 
Mid. W. Yunnan: Tali Range, 
E. flank, 10,000-12,000 ft. 
(Forrest.) 
Rh. plebetum, Balf. f. et W. W. W. Yunnan: Shweli-Salween 
Sm. (1917). divide, 10,000-11,000 ft. 
(Forrest.) 
Rh. rubiginosum, Franch. Mid. W. Yunnan: Tali Range, 
(1887). 8000-11,000 ft. (Delavay); 
Likiang Range, 10,000- 
12,000 ft. (Forrest.) 
The list does not include all the forms of the series. Both 
from Western and Eastern Yunnan there are specimens which 
do not come within the limits of described species. Their 
position remains for future investigation to determine. Kh. 
rubiginosum seems to be variable, and probably its specific 
boundary will have to be redrawn when we get to know more 
of the plants of which there is at present available for study 
inadequate material. In the list given above I have cited for 
its distribution only areas from which the type or undoubtedly 
typical specimens have been brought. 
Rh. fumidum belongs to the set within the Heliolepis series, 
in which the uniform scales on the under-leaf surface are dis- 
contiguous but separated by intervals less than the diameter 
of the scales. Its nearest ally seems to be Rh. pholidotum, in 
which the pedicels are longer, the calyx puberulous outside, and 
the ovary hair-crested. The glabrous style of Rh. fumidum is 
a character which it shares in the series with Rh. rubiginosum. 
Rh. pholidotum is exceptional in having the style sometimes 
glabrous sometimes pilose. 
& Rhododendron oe Balf. £. et Ward. 
Frutex . altus ramis decumbentibus Aoi ae 
late patentibus eidhbiaztemy alpinum et montium summorum 
