''Rhododendron campylocarpum'' (弯果杜鹃) is a

rhododendron ''Rhododendron'' (; from Ancient Greek ''rhódon'' "rose" and ''déndron'' "tree") is a very large genus of about 1,024 species of woody plants in the heath family (Ericaceae). They can be either evergreen or deciduous. Most species are nati ...

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

native to eastern

Nepal Nepal (; ne, नेपाल ), formerly the Federal Democratic Republic of Nepal ( ne, सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल ), is a landlocked country in South Asia. It is mai ...

Sikkim Sikkim (; ) is a state in Northeastern India. It borders the Tibet Autonomous Region of China in the north and northeast, Bhutan in the east, Province No. 1 of Nepal in the west and West Bengal in the south. Sikkim is also close to the Siligur ...

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Arunachal Pradesh Arunachal Pradesh (, ) is a state in Northeastern India. It was formed from the erstwhile North-East Frontier Agency (NEFA) region, and became a state on 20 February 1987. It borders the states of Assam and Nagaland to the south. It shares int ...

, southeastern

Tibet Tibet (; ''Böd''; ) is a region in East Asia, covering much of the Tibetan Plateau and spanning about . It is the traditional homeland of the Tibetan people. Also resident on the plateau are some other ethnic groups such as Monpa people, ...

, and southwestern

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

, where it grows at altitudes of 3000–4000 meters. It is a

shrub A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees ...

that grows to 2–3 m in height, with leathery leaves that are suborbicular or ovate-elliptic to oblong-elliptic, 4–8.5 by 2.5–4 cm in size. Flowers are yellow.

Description from J.D.Hooker

"''Rhododendron campylocarpum''", J. D. Hooker, ''Rhododendr. Sikkim-Himalaya''. 3: t. 30. 1851. ''RHODODENDRON CAMPYLOCARPUM, Hook. fil.'' ''Curve-fruited Rhododendron.'' ''Frutex gracilis, virgatus, ramosus, cortice papyraceo, ramulis ultimis pedunculis pedicellisque glanduloso-pilosis, foliis petiolatis ovato- vel oblongo cordatis apice rotundatis utrinque glaberrimis superne nitidis subter pallidioribus interdum glaucescentibus, capitulis terminalibus laxis 6-8-floris pedicellis gracilibus, calyce 5-lobo glanduloso, corolla (elegantissima) campanulata alba v. saturate straminea immaculata lobis 5 patentibus, staminibus 10, antheris rubris, filamentis glabris, ovario glanduloso, capsulis patentibus valde arcuatis cylindraceis'' angustis pilis rigidis glanduloso-capitatis aspersis plerisque 6-valvis, seminibus pallidis. ''HAB: Sikkim-Himalaya; rocky valleys and open spurs, elev. 11-14,000 feet; abundant. Fl. June; fr. November.'' ---- ''A small bush, averaging six feet in height, rounded in form, of a bright cheerful green hue, and which, when loaded with its inflorescence of surpassing delicacy and grace, claims precedence over its more gaudy congeners, and has always been regarded by me as the most charming of the Sikkim Rhododendrons. The plant exhales a grateful honeyed flavour from its lovely bells and a resinous sweet odour from the stipitate glands of the petioles, pedicels, calyx, and capsules. Leaves on slender petioles, three-quarters of an inch long, coriaceous but not thick in texture, two to three and a half inches long, one and three-quarters to two inches broad, cordate at the base, rounded and mucronate at the apex, in all characters, except the evanescent glandular pubescence and spherical buds, undistinguishable from Rhododendron Thomsoni. Flowers horizontal and nodding. Corolla truly campanulate, delicate in texture, tinged of a sulphur hue and always spotless, nearly two inches long. broader across the lobes, which are finely veined. The pedicels of the capsules radiate horizontally from the apices of the ramuli, and the capsules themselves curve upwards with a semicircular arc; they are about an inch long, always loosely covered with stipitate glands.''

References

The Plant List

Flora of China

Hirsutum.com
campylocarpum Plants described in 1851 Taxa named by Joseph Dalton Hooker {{Ericaceae-stub