Botryosphaeria . A wilting rhododendron branch with the bark partially removed to reveal the brown discoloration in the wood caused by . Rhododendron excellens NVD#018 A Maddenia new to cultivation, closely related to nuttallii but with foliage that is more strongly glaucous-white beneath. Blooming in early to mid spring, it bears abundant, vivid yellow, trumpet-shaped flowers with darker spotting on their dorsal lobes. Peeling bark on a Botryosphaeria-diseased apple branch. f.; R. oblongum Griff. R. xanthostephanum – bright yellow small flowers – Lovely red peeling bark – probably best as a pot plant – needs to be trained and pruned for shape – somewhat tender. Females are approximately 1/8-inch long White felt-like sacs are secreted in May that enclose the body and eggs. Very large and fragrant white flowers with a strong yellow-orange blotch in late spring to early summer. Azalea Bark Scale, Eriococcus azalea: This insect prefers azalea or rhododendron but can infest andromeda, maple, willow, poplar and other plants. Figure 4. Eggs are laid in the spring and hatch from late-June to mid-July. The hardiest of the larger-flowered maddenias. R. yakushimanum see R. degronianum subsp. It is quite devoid of down or hairs in all its parts. (Photo by E. A. Bush) Synonyms: R. aucklandii Hook. Smooth and peeling bark. (Photo by E. A. Bush) Figure 2. Rhododendron griffithianum Wight. Leaves narrowly oblong, 6 to 9 (sometimes … yakushimanum – for a description of this most popular species rhododendron. species. An evergreen shrub, or occasionally a small tree, with erect branches and peeling bark. Delightfully fragrant and with its attractive peeling bark, Rhododendron 'Saffron Queen' is a medium-sized evergreen shrub with flowers held in lax trusses of 8-9.
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