•202 TRANSACTIONS OF THE [Sess. lxxxi 



E.N.W. Yunnan : — - Langkiung-Hoking divide. Alt. 

 10,000-11,000 ft. Lat. 26° 25' N. In rhododendron 

 thickets. Shrub of 10-30 ft. Flowers pale yellow, spotted 

 crimson. G.Forrest. No. 10,023. May 1913. 



E.N.W. Yunnan : — Langkiung-Hoking divide. Alt. 9000- 

 10,500 ft. Lat. 26° 25' N. In rhododendron thickets. 

 Shrub of 20 ft. Flowers white, with a few rose markings 

 flushed rose exterior. G. Forrest. No. 10,032. May 1913. 



E.N.W. Yunnan : — Mountains of the Chungtien plateau. 

 Alt. 9000-10,000 ft. Lat. 27° 30' N. In open thickets. 

 Shrub of 20 ft. Flowers yellowish, white margined rose 

 with deep crimson markings. G. Forrest. No. 12,410. 

 April 1914. 



The above record shows that the species has a compara- 

 tively large area of distribution in Yunnan. Beginning 

 in the south on the eastern flank of the Tali Range it 

 occurs near Langkiung, the earliest known locality, and 

 apparently is common a1)out that region having been found 

 on the Langkiung-Hoking divide, and in the Sungkwei 

 pass leading out of the Langkiung valley ; much farther 

 north it appears on the Cliungtien plateau. It is a 

 wonderfully constant type over its area. Some degree 

 of variation it exhibits. In size of leaf, for instance ; also 

 in size of flower — and this is the most noteworthy. ■ In 

 Delavay's Langkiung specimen the corolla is, as Franchet 

 says, not large — it does not reach 3"7 cm. — but in some of 

 Forrest's specimens i'rom the Langkiung-Hoking divide 

 (No. 10,032 in particular) the corolla is at least 5*5 cm. 

 long and all the other flower-parts have correlative size- 

 modification. Franchet says nothing of a character of 

 some import diagnostically — the presence of crimson glands 

 on the outside of the corolla. These occur on Delavay's 

 plant (No. 2352), which, tlu'ougli the kindness of M. Lecomte 

 of the Paris Herbarium, I have been enabled to examine. 

 In Forrest's specimens they are prominent, particularly 

 on the mid-veins of the petals, but sometimes a vein may 

 show none. 



The species is one of the most easily recognised of all 

 rhododendrons. The rigid more or less lanceolate glaucous 

 apparently quite glabrous leaves are characteristic; their 

 somewhat fawn-coloured under -leaf surface is always 



