BaALFOUR—NEW SPECIES OF RHODODENDRON. 209 
flavescentibus ad verticem praeditum ; stylus basi plus minusve 
pilosus purpureus corollam et stamina longe superans ; stigma 
discoideum atro-purpureum lobulatum. 
Planta Rh. rupicolo, W. W. Sm. valde affinis forsanque illius 
microforma, corolla roseo-purpurea, staminibus plerumque 5, 
ovario ex toto albido-piloso diversa. 
Yunnan. Mountains of the Chungtien plateau. Lat. 
27° 30’ N. Alt. 12,000-13,000 ft. Shrub of 2 ft. Flowers 
dull deep magenta red. On open cliffs. G. Forrest. No. 
12,581. July ror. 
This species is recognisable at sight from RA. rupicolum, 
W. W. Sm., its close ally, by the paler colour of the flowers. 
In habit and foliage the two plants are alike. Rh. achroanthum 
has commonly 5 stamens—in only one flower, to be sure 
there are but few flowers altogether on the specimens, have I 
found 6—whilst Rh. rupicolum has 10. A difference in the 
ovaries of the two plants seemed at first to be most distinctive, 
but it may not have this importance. In Rh. achroanthum 
the ovary is grey in colour, being coated to the top with adpressed 
hairs ; only at the summit are to be found a few lepidote scales 
amongst the hairs. In Rh. rupicolum the ovary in the upper 
two-thirds is densely lepidote and only the basal part has 
adpressed hairs. The general aspect of the plants suggests 
Rh. achroanthum as being only a variety of Rh. rupicolum, and 
it may be so, but the flower colour is very characteristic. 
See also p. 299. 
4g Rhododendron acraium, Balf. f. et W. W. Sm. 
Fruticulus aromaticus parvifolius ad 1.5 m. altus breviter 
verticillatim ramosus. Ramuli annui breves ad 2 ¢m. longi 
hornotini dense citrino-lepidoti annotini 1.5 mm. diam. fulvi 
dense porriginosi seniores grisei nigro-tuberculati perulis persis- 
tentibus haud vestiti deinde decorticantes. Alabastrorum oblon- 
gorum acutorum vel obtusorum perulae mox deciduae externae 
coriaceae ovatae carinatae mucronulatae fulvae dorso lepidotae 
apicem versus subciliatae intus puberulae ad 4 mm. longae 
interiores subspathulatae submembranaceae flavidae carinatae 
apice rotundatae extus lepidotae intus puberulae margine 
hirsuto-ciliatae ad 8 mm. Jongae ad 2 mm. latae. Folia petio- 
lata vix ad 2 cm. longa; lamina crasse coriacea oblonga vel 
oblongo-elliptica circ. 1.5 cm. longa 8 mm. lata apice mucrone 
corneo recto terminata margine revoluta stipitum squamarumque 
vestigiis notata basi obtusa nec cordulata supra atro-viridis 
plana (costa media subsulcata caeteroquin venarum reti occulto) 
Squamarum juvenilium vestigiis siccis subasperata (in juventute 
pagina margineque citrino-lepidotis esetulosis) infra fulva (in 
