Rhododendron serotinumA newly introduced, very ornamental and distinct species from the South Yunnan North Vietnam frontier. The quite large, white and fragrant flowers appear in mid summer. This vigorous species has foliage similar to that of R. hemsleyanum and R. decorum but with narrower leaves and a more upright and narrow growth habit and much larger flowers. HIGHLY FRAGRANT. Grows tall, to 12 ft. Hardy to zone 6.