Azuma rhododendron
A specific variety of rhododendron (Rhododendron metternichii var.). Botanical term; typically written in katakana.
Azuma rhododendrons grow naturally on rocky mountain slopes.
Katakana spelling is common for plant names; usually written in kana.
Kanji spelling is rare; the plant is usually referred to in kana.
Named after the Azuma region (東) combined with 石楠花 (shakunage, 'rhododendron'). The exact historical derivation is uncertain.