Rhododendron campanulatum

Habit

Large shrub or tree

Family Description

Trees, shrubs, or subshrubs, often evergreen, sometimes epiphytic. Leaves alternate, sometimes becoming aggregate into pseudo-whorls, simple, pinnately veined, exstipulate. Flowers in racemes, corymbs, panicles, clusters or solitary, actinomorphic or zygomorphic, bisexual. Calyx of 5(-8)sepals, free and borne on ovary, or united into tube at base. Corolla of 5(-10)petals united at base or almost to apex, tubular, barrel-shaped, urn-shaped, campanulate, funnel-shaped or salver-shaped. Ovary inferior or superior, 4-5(-20)-celled; style cylindric; stigmasimple; ovules numerous, axile. Fruit a berry or 5(-20)-valved capsule, sometimes enclosed by enlarged fleshy calyx.. . Members of the Ericaceae are of great horticultural importance in North temperate countries, particularly in Europe and north America where many genera are prized as ornamentals, including Rhododendron (by far the most important), Enkianthus, Pieris, Gaultheria, Vaccinium and Agapetes. Bhutan is particularly rich in Ericaceae, and there exists some economic potential for commercial production ot the rare species.. . The family is treated here in a broad sense, including those genera sometimes placed separately in Vacciniaceae.

Genus Description

Evergreen shrubs or trees, often aromatic;indumentum of simple or compound hairs or peltate scales. Leaves alternate or clustered at branch ends, coriaceous,entire. Flowers interminal condensed racemoes, rarely solitary, weakly zygomorphic. Calyx 5(-8)-lobed, often reduced to shallow cup. Corolla campanulate, funnel-shaped or salver-shaped, rarely cylindric, with5-10 long or short lobes. stemans (5-)10(-18). Ovary 5-20-celled;stigma capitate. Capsule 4-20-valved.

Species description

Large shrub 1.5m-4m or small tree to 6m; branchlets glabrous. Leaves thinly coriaceous, elliptic, sometimes elliptic-obovate, 7-11*3-5cm, acute or subacute, base rounded or narrowly cordate, margins weakly or not reflexed when dry, glabrous and without metallic bloom above, with fine, very short, fawn or pale brown indumentum of capitellate hairs closely appressed to lower surface (soft to touch); petioles glabrous 0.5-1.8cm. Racemes 8-15 flowered; pedicels 1.5-2.5cm, glabrous. Calyx c 1mm, glabrous. Corolla open-campanulate, 2.5-3.5cm, 5-lobed, white or pink, with reddish spots and large blotch at the base within. Stamens 10; filaments glabrous or with a few hairs at base. Ovary glabrous. Capsules weakly curved, 2-2.25* 0.5-0.7cm.