353 
Descriptions of and observations on some Species of RHODODENDRON, 
collected in Assam and Bootan by Tuomas J. Boorn; by THOMAS 
NUTTALL. 
RHODODENDRON proper.—Having an obscure or well-developed 5- 
toothed or 5-lobed calyx, usually 10 stamens, and a filiform slightly 
lobed stigma: the ovary and capsule generally of 5 cells.—To this di- 
vision may be referred, in sections, all the European, North American, 
Northern Asiatic, and many of the Indian species. 
* Leaves with glandular scales. Stigma mostly capitate. Ovary five- 
rarely six-celled. : 
1. RHODODENDRON Keysi, Nutt. 
Fruticosum : foliis ovato-lanceolatis acutis glabris, subtus glaucis squa- 
mosis planis; floribus parvis; corymbulis 5—6-floris; laciniis caly- 
cinis subeequalibus obtusiuseulis minutis; staminibus 10, filamentis 
exsertis basi pilosis ; capsulis cylindraceo-ovatis 5-locularibus ; semi- 
nibus lanceolatis immarginatis. 
Has. Mountains of Bootan, at an elevation of 9—10,000 feet above 
the sea-level. On the summit and northern ridges of the Lablung. 
A hardy shrub, growing to the height of 2 or 3 feet, and forming 
low thickets, accompanied by Gaultherias and stunted Yews, above the 
range of R, Hookeri and R. Falconeri, and associated with one of our 
parasitic species allied to R. camellizflorum.—bLeaves 23-3 inches long, 
about an inch wide, opake, coriaceous, and smooth, lanceolate or lan- 
ceolate-ovate, acute, rounded or narrowed towards the petiole, beneath, 
as well as the capsule, almost covered with brown circular resinous 
scales. Corymb compounded of three or four branchlets, each contain- 
ing five or six flowers. Calyx five-toothed, small, the teeth nearly 
equal and obtuse. Corolla (judging from the withered remains only) 
rather small, apparently tubular or urceolate, the border five-lobed and — uer 
reflected; the segments ovate, obtuse. Stamens ten, exserted ap- - 
parently beyond the corolla, lower half of the filament very hairy or - 
hirsute; as well as the lower half of the style. Anthers with the usual - 
truncated pores. Capsule light brown, ovate-cylindric, obtuse. Seeds . 
dark brown, scarcely subulate, and without the usual margin. 
Rather aromatie, from the resinous scales with which the leaves are - 
clad beneath.  Perfeetly hardy, during the winter and spring of 1851 - 
VOL. Y. 272 
