BALFOUR—NEW SPECIES OF RHODODENDRON. 217 
Ovarium 5-lobatum conoideum circ. 1.5 mm. longum dense 
flavido-lepidotum ;_ stylus vix 0.75 mm. longus claviformis 
stigmate 5-lobato coronatus. 
Species cum Rh. cephalantho, Franch. olim confusa sed valde 
diversa et notis sequentibus facile distinguenda :—alabastrorum 
perulis late ovatis obtusis mox deciduis nec acuminatis persis- 
tentibus, foliis minoribus, prophyllis bracteisque haud _ villosis 
calycem subaequantibus, corollae tubo extus puberulo. 
Yunnan. Eastern flank of the Lichiang Range. Alt. 
II,000-11,500 ft. Lat. 27° 10’ N. Branched shrub of 2-4 
ft. Flowers white, fragrant. Dry ledges of limestone cliffs. 
G. Forrest. No. 2182. May 1906 
Yunnan. Eastern flank of the Lichiang Range. Alt. 11,000- 
12,000 ft. Lat. 27° 25’ N. Shrub of 2-3 ft. Flowers white, 
foliage fragrant with a resinous odour. Limestone cliffs and 
humus-covered boulders. G. Forrest. No. 5866. May Igro. 
This Lichiang plant in No. 2182 was referred by Diels * 
to Rh. cephalanthum, Franch. But it is very different from 
that species. At a glance one notices the absence of the per- 
sistent foliage-bud scale-leaves on the branches so characteristic of 
Rh. cephalanthum, and the shape of the scale-leaves broadly ovate 
blunt with a mucro in Rh. cephalanthoides and narrow long 
sharply pointed in Rh. cephalanthum is an obvious diagnostic 
mark. 
Rh. acraium, Balf. f. et W. W. Sm. of the Chungtien Plateau 
(Forrest No. 10,652) isa much nearer ally, but it wants the scabrid 
branches and has a smaller corolla not puberulous outside. 
Forrest has two specimens from the Lichiang Range which 
resemble closely Rh. cephalanthoides, described above, from the 
Eastern flank of the same range. The labels on Forrest’s speci- 
Yunnan. Western flank of the Lichiang Range. Alt. 
12,000 ft. Lat. 27°25’ N. Symmetrically shaped shrub of 2-6 ft. 
Flowers white, foliage aromatic. Amongst rocks on alpine 
meadows. G. Forrest. No. 5878. June r1gto. 
Yunnan. Lichiang Range. Alt. 13,000 ft. Lat. 27° 25’ N. 
G. Forrest. No. 10,312. June 1913. 
Although the second ticket does not bear ‘‘ Western flank,” 
Mr. Forrest believes it is from that station. I record this, 
for the details of structure do not quite conform. There are 
minor differences in flower structure between Forrest’s Nos. 
5878, 10,312 and Rh. cephalanthoides, but we do not know enough 
about these plants to enable us to fix specific limits, and may 
regard them meanwhile as forms of Rh. cephalanthoides. The 
occurrence of allied species showing slight differences is to be 
* Diels in Notes R.B.G., Edin., vii (1912), 165. 
