(Upload on October 22 2011) [ 日本語 | English ]

Rhododendron brachycarpum D. Don ex G. Don

Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Rhododendron L. (ツツジ)
Hakusansyakunage (ハクサンシャクナゲ, 白山石楠花), short-fruited azalea
Ezosyakunage (エゾシャクナゲ, 蝦夷石楠花), Shirobanasyakunage (シロバナシャクナゲ, 白花石楠花), Shirobanahakusansyakunage (シロバナハクサンシャクナゲ, 白花白山石楠花)
Life form: evergreen shrub < 5 m in height → ericoid mycorrhiza
Distribution: Korea - Japan (except Kyushu)
Habitat: subalpine forest (larch forests on Mount Koma)
Use: widlely used for gardening
Flower: white - pale pink ↔ R. aureum Georgi (キバナシャクナゲ) = pale yellow
f. brachycarpum (ウラゲハクサンシャクナゲ, s.s.)
f. fauriei (Franch.) Murata (ケナシハクサンシャクナゲ)
f. nemotoanum (Makino) Murata (ネモトシャクナゲ/ヤエハクサンシャクナゲ): distributed in Shimane and Nagano

Rhododendron brachycarpum on Mount Koma

Rhodo1 Rhodo2 Rhodo3
Rhodo4 Rhodo5 Rhodo6
[1-3] a conserved tree on the north-faced foot of Mount Koma (Boyo-no-mori, 望洋の森) on July 22 2011. The stems are shorter on the south-west slope at higher elevation. [4/5] on the southwestern slope of Mount Koma (⇒ flora) on July 10 2017. [6] along a tiny trail for looking around small islands in O-numa Park, southern Hokkaido, on July 7 2013. The plants are considered to be a variety of R. brachycarpum, because the flower buds are pink and are changed to white with flowering. Although the local name is Erimosyakunage (エリモシャクナゲ, 襟裳石楠花), the scientific name is probably not assigned.