Rhododendron

…A shrub or tree of the genus Rhododendron in the family Ericaceae. The leaves are evergreen or deciduous, alternate, not sawtoothed, and have water holes at the tips. The flowers are bell-shaped or sometimes tubular, with 5 to 8 lobes at the tip. The stamens are equal to or twice as many as the corolla lobes, and the anthers have holes at the tips to scatter pollen. The capsules are made up of 4 to 5 lobes, and the backs of the lobes split vertically to scatter numerous small seeds. About 850 species are known worldwide. The genus Rhododendron is generally divided into deciduous azaleas and evergreen rhododendrons. …

*Some of the terminology that mentions "rhododendron" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…ツツジ科ツツジ属の低木または高木。葉は常緑または落葉性で互生し，鋸歯がなく，先端に水孔がある。花は鐘形ときに筒形で，先が5～8裂する。おしべは花冠裂片と同数か2倍あり，葯は先端に穴が開いて花粉を散らす。蒴果（さくか）は4～5室からなり，室の背面が縦に裂けて多数の小さな種子を散らす。世界に850種ほどが知られる。　ツツジ属Rhododendronは一般に，落葉性のツツジ類と常緑性のシャクナゲ類に分けられる。…

※「rhododendron」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報