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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]
Subgenus Rhododendron L.: Small leaf or lepidotes (scales on the underside of the leaves). 3 sections, 462 species, type species: R. ferrugineum. Subgenus Hymenanthes (Blume) K.Koch: Large leaf or elepidotes (without scales). 1 section, 224 species, type R. degronianum.
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
[1] [2] The vast majority of Rhododendron species are native to the eastern Himalaya and southeast Tibet, along with the islands of Java, Sumatra, Borneo, New Guinea, and the Philippines. The rest are broadly spread throughout the northern hemisphere in relatively small isolated populations, including Japan, northwestern North America, the ...
Leaves are thin and small on azaleas while rhododendron foliage is larger, thick, and leathery. The ideal growing conditions for most azalea cultivars are areas with filtered light and well ...
Rhododendron subsect. Grandia is a subsection of section Ponticum in Hymenanthes in the genus Rhododendron . It comprises 15 species of trees with large leaf blades covered with trichomes native to East Asia .