Rhododendron dendrocharis – A dwarf Chinese species found in Sichuan province, it was introduced into general cultivation around 1981. It bears pale pink blooms (occasionally white) with rose spotting from April to May and has been described by some as resembling a dwarf R. moupinense. The leaves and stems are covered in long hairs. Grows 2′ high by 3′ wide. Zone 6.
Rhododendron cyanocarpum – This native of Sichuan and Yunnan province in China is endangered in its native habitat due to development pressures. It bears trusses of white to light pink funnel-shaped flowers from March to April (in coastal BC) that are nicely contrasted by the handsome rounded bluish-green foliage. Will eventually grow to 12′ high. Hardy to zone 7.
Rhododendron mucronulatum var. taquetii (syn. var. chejuense, ‘Dwarf Cheju’) – A small-leaved deciduous species rhododendron discovered on Cheju Island, just south of Korea. This variety blooms later than the species and features bright rose-pink flowers on compact flat-topped plants, blooming March to April. Grows 2′ high by 2-3′ wide. Hardy to zone 5.
Rhododendron ochraceum – An RHS Award of Garden Merit winner with spherical trusses of dark red flowers from April to May. It is a native of Yunnan and Sichuan province in China and features pale brown to yellowish-brown indumentum on the leaf reverse. This species was introduced to western cultivation in 1995. Grows to about 5-6′ high in 10 years. Hardy to zone 7.
Rhododendron coeloneuron – Another Chinese species that is found in both Sichuan and Guizhou province where it can grow as a small tree. It bears white to pink blooms (that darken as they fade) held in lass trusses of 4-9 flowers, usually in April. The deeply veined dark green leaves have heavy rusty-brown indumentum. Grows 4-6′ high in 10 years. Hardy to zone 6.