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Rhododendron macrophyllum, the Pacific rhododendron, [2] California rosebay, [3] California rhododendron, coast rhododendron or big leaf rhododendron, is a large-leaved species of Rhododendron native to the Pacific Coast of North America. It is the state flower of Washington. [4]
Hymenanthes, with approximately 225 species, and subgenus Rhododendron, with approx. 400 species, comprise what gardeners typically describe as "Rhododendrons." Two subgenera are generally known to gardeners as "Azaleas", and include many fewer true species: Pentanthera , which comprises the deciduous azaleas, and Tsutsusi , which includes ...
Like other ericaceous plants, most rhododendrons prefer acid soils with a pH of roughly 4.5–5.5; some tropical Vireyas and a few other rhododendron species grow as epiphytes and require a planting mix similar to orchids. Rhododendrons have fibrous roots and prefer well-drained soils high in organic material.
Rhododendron catawbiense, with common names Catawba rosebay, [2] Catawba rhododendron, [3] mountain rosebay, [3] purple ivy, [3] purple laurel, [3] purple rhododendron, [3] red laurel, [3] rosebay, [3] rosebay laurel, [3] is a species of Rhododendron native to the eastern United States, growing mainly in the southern Appalachian Mountains from West Virginia south to northern Alabama.
The leaves can be poisonous. Leaves are sclerophyllous, simple, alternate, and oblong (10 to 30 cm long, 5 to 8 cm wide). It retains its waxy, deep-green leaves for up to 8 years, but once shed are slow to decompose. It produces large, showy, white to purple flowers each June and July. [3] Bark of Rhododendron maximum
As of 2006 the Foundation's mission is devoted to the conservation, research, acquisition, evaluation, cultivation, public display, and distribution of rhododendron species. The gardens contain over 10,000 rhododendrons, set out as a woodland garden among native conifers. It is adjacent to the Pacific Bonsai Museum.
Rhododendron ponticum, called common rhododendron or pontic rhododendron, is a species of flowering plant in the Rhododendron genus of the heath family Ericaceae. It is native to the Iberian Peninsula in southwest Europe and the Caucasus region in northern West Asia .
Rhododendron albiflorum is a deciduous shrub up to 2.5 m tall, with thin shiny medium-green elliptical entire leaves that are 4 to 9 cm long and held on short petioles. . The leaves are often slightly crinkled or wavy especially at their edges, and are sparsely covered with reddish to white ha