way? 
162 BALFOUR—NEW SPECIES OF RHODODENDRON. 
flushed rose on exterior. Very rare! G. Forrest. [Without 
E.N.W. Yunnan. Kari Pass. On the margins of pine forests. 
Alt. 12,000 ft. Lat. 28° N. Shrub of 3-5 ft. Flowers canary 
yellow. G. Forrest. No. 13,914. June 1917. 
Yunnan. Without precise locality. Duplicate in fruit. 
G. Forrest. No. 17,423. Oct. 1918. 
One of the Trichocladum series and allied to Rh. melinanthum, 
Balf. f. et Ward, from Ka-gwr-pw, from which its leaf-form 
distinguishes it. 
Rhododendron sidereum,* Balf. f.+ (Grande.) 
Tree as much as 9 m. high with stout branches 8 mm. in 
diameter when a year old, coated with a dirty grey thin aggluti- 
nate indumentum of greasy hairs scaling off on older branches. 
Foliage-bud large nose bullet-shaped and with many imbricating 
scale-leaves outside; the outermost scale-leaves (2 or 3) woody 
short with small rotundate base ending in a long acuminate tail 
four times or less the length of the base with a floccose tomen- 
tum, followed by rounded crustaceous ones gradually becoming 
oval or oval-oblong earlier ones mucronate later ones emarginate 
the back clad with very reddened floccose hairs and sticky from 
immersed glands ; innermost scale-leaves petiolate more mem- 
branous as much as 4.5 cm. long, the lamina lanceolate acute 
ending in a long mucro densely tomentose with brown or reddish 
floccose greasy hairs ; young leaves revolute densely tomentose 
on both surfaces and glandular on under surface. Leaves petio- 
late as much as 23 cm. long persistent for a couple of years ; 
lamina leathery oblong-lanceolate often slightly curved as much 
as 21 cm. long 6 cm. broad, acute with a hydathodal apiculus 
* sidereus, excellent—expressive of the qualities of the plant. 
{| Rhododendron sidereum, Balf. f—Arbor ad 9 m. alta. Rami breves 
crassi indumento griseo agglutinato induti. Alabastra oblonga magna perulis 
plurimis imbricatis obtecta. Folia petiolata ad 23 cm. longa; lamina coriacea 
oblongo-lanceolata ad 21 cm. longa 6 cm. lata, acuta mucronata, margine paullo 
recurva, i obtusa vel late cuneata ; oo olivacea subnitens glabra vel in 
abtus argen i i 
tita; petiolus circ. 2 cm. longus aggluti- 
nato- tomentosus. Flores in daceinistekabeliatn lurifloram, dispositi, rhachi 
longa floccosa; bract eae sexe cis crustaceae rotundatae glutinosae, intimae 
es circ. 5 mm. 
circ. 2 cm. soma al -tomentosi sub calyce obliqui. Calyx brevissimus. Corolla 
truncatum sulcatum circ. 7 mm. longum 12-loculare, dense albo-tomentosum 
eglandulosum ; stylus crassus glaber; stigma discoideum recurvum 
