Rhododendron setosum D. Don

Habit

Subshrub

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 to 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

Compact dwarf shrub 10-60cm; young shoots densely scaly and spreading-bristly. Leaves oblong-obovate, 0-13x3-6mm, rounded, truncate or shallowly retuse, base rounded, conspicuously scaly with yellowish scales above and red-brown scales beneath, apex, margins, and base of midrib beneath bristly; petioles c 1mm. Racemes dense, 2-5-flowered; pedicels 3-8mm, scaly and puvbescent. Calyx deeply 5-lobed, lobes ovate-elliptic, 4-7mm, obtuse, scaly, sometimes ciliate. Corolla open funnel-shaped, 1.3-1.6cm, pale to deep purple, deeply 5-lobed, glabrous outside. Stamens 10, exserted; filaments pubescent towards base. Ovary pubescent and scaly. Capsules oblong-ovoid, c 5mm.