une 
60 BALFOUR—RHODODENDRON : 
Western N.W. Yunnan. Mekong-Salween divide. Forrest. 
14,233. June 1917. 
Rhododendron sinonuttallii, Balf. f. et Forrest. 
Frutex ad 2.5 m. altus megaphyllus RA. Nuttallii, Booth 
simillimus sed pedicello pubescente et calyce extus pubescente 
lepidotoque facile distinguendus. 
.E. Tibet. Tsarong. Salween—Kiu-chiang divide. Forrest. 
18,939. Sept.-Oct. 1919. 
Rhododendron sphaeroblastum, Balf. f. et Forrest. 
Frutex vix 2 m. altus. Rami juveniles crassi circ. 7 mm. 
diam. glabri nitidi virides vel purpurascentes. Folia magna 
petiolata ad 15 cm. longa; lamina crasse coriacea ovalis vel 
oblongo-ovalis apice obtusa vel subrotundata mucrone parvo 
rubro sessili terminata margine plana basi rotundata; supra 
olivacea in modum squali corii rugulosa glabra costa media 
sulcata minute puberula excepta, venis primariis utrinsecus 
ad 12 paullo sulcatis ; subtus laete ferrugineo-tomentosa indu- 
mento crasso bistrato persistente vestita, strati superi pilis 
elongatis sub-dendriformibus multo ramosis superficiem laxam 
lanatam demum nunc sub-agglutinatam fingentibus et pilos 
rosulatos breviter ramosos strati inferi superantibus, costa 
media prominula saepe plus minusve glabrescente; petiolus 
ad 2 cm. longus saepe deflexus rugulosus viridis vel purpureus 
glaber. Umbella racemosa ad 12-flora rhachi valida glabra 
circ. r cm. longa; inflorescentiae alabaster magnus globosus 
3.4 cm. diam.; bracteae extimae ovatae, interiores obovatae, 
molles plus minusve puberulae ; pedicelli breves glabri. Calyx 
parvus 5-lobus glaber ; lobi late triangulares vel ovati obtusi 
vel subacuti. Corolla (immatura et marcida solum visa) forsan 
alba roseo-suffusa certe postice kermesino-maculata 5-loba. 
Stamina 10 inaequalia ; filamenta lata puberula. Discus glaber. 
Ovarium truncatum glabrum minute papillatum; stylus 
staminibus longior glaber. Capsula ad 9g-locularis paullo 
curvata circ. 2 cm. longa 6 mm. diam. valvis simplicibus vel 
compositis ab apice dehiscens. 
S.W. Szechwan. Mts. around Mu-li. Forrest. 17,360. 
July 1918. Also 16,377, 17,110. 
Rhododendron stenoplastum, Balf. f. et Forrest. 
Frutex ad 3 m. altus. Ramuli epilosi lepidoti. Folia sub- 
coriacea petiolata lanceolata vel oblanceolata acuminata ad 10 
cm. longa 2.5 cm. lata, basi saepe inaequalia cuneata; supra 
laete viridia laevia squamarum vestigiis obtecta epilosa ; subtus 
-_~palilide fulva punctulatim lepidota; petiolus 1.5 cm. longus 
