170 BALFOUR—NEW SPECIES OF RHODODENDRON. 
6-8 on each side very slightly grooved; under surface paler a 
yellow-green with raised red-tinted midrib clad like the midrib 
on upper side, general surface shagreened the ultimate veinlets 
showing as a red impressed network sprinkled with flocks of 
whitish much-branched adpressed hairs; petiole red-tinted 
broad about 5 mm. long grooved bristly. Umbel small terminal 
of 2-4 flowers ; flower-bud globose relatively large ; outer bracts 
leathery rounded with a tail as long as the base dark red-brown 
1 cm. long or a little more keeled and puberulous outside shortly 
ciliate, inner bracts oblong densely silky about 1.5 cm. long 7 mm. 
or more broad cucullate; bracteoles short about 8 mm. long 
thread-like pilose throughout and white hair-crested ; pedicels 
stout about 1.5 cm. long densely clad with bristle-like red glands 
densely so at the swollen tip where are also a few fasciate flock- 
hairs. Calyx persistent small somewhat fleshy about 2 mm. 
long glabrous outside divided about half way into 5 subequal 
rounded broad lobes with long marginal bristle-glands. Corolla 
tubular-campanulate pale rose-pink without markings about 
3-3 cm. long glabrous outside and inside ; tube slightly thicker 
at base and retuse with faint inside interpetaline ridges 5-lobed ; 
lobes broad rounded about 1.3 cm. long 2 cm. broad emarginate 
slightly crenulate. Stamens 1o slightly unequal much shorter 
than corolla and slightly shorter than gynaeceum, longest stamen 
about 2.3 cm. long shortest about 1.8 cm. long ; filaments slightly 
dilated downwards glabrous, anthers about 2 mm. long. Disk 
glabrous. Gynaeceum about 2.5 cm. long shorter than corolla ; 
ovary about 3 mm. long dome-shaped deeply grooved truncate 
densely clad with bristle-glands and short glands and a few 
fasciate flock-hairs ; style stout glabrous swollen below the broad 
discoid lobulate stigma. 
S.E. Tibet. Tsarong. On Ka-gwr-pw, Mekong-Salween 
divide. Alt. 14,000 ft. Lat. 28° 14’ N. In cane brakes 
and rhododendron thickets. Shrub of 2-3 ft. Flowers pale 
rose-pink without markings. G. Forrest. No. 16,826. 
July i918. 
Rh. trichomiscum is one of a group of beautiful moorland 
-Rhododendrons discovered by Forrest in the Tsarong district 
of S.E. Tibet on the slopes of Ka-gwr-pw and Doker-la. The 
other members of the group are Rh. eudoxum, Balf. f. et Forrest,* 
Rh. temenium, Balf. f. et Forrest, and Rh. pothinum, Balf. f. 
et Forrest (see p. 147 of this story). They are forms which 
occupy a position amongst Rhododendrons between those 
which we can assemble around Rh. sanguineum, Franch. in a 
Sanguineum series and those which aggregate about RA. nerti- 
florum, Franch. in a series which has not yet been sufficiently 
* Notes R.B.G. Edin., xi (1919), 60. tT Ibid., 146. 
