Akashigata camellia; Camellia sasanqua 'Akashigata'
A specific cultivar of the Christmas camellia (Camellia sasanqua). The name is a proper noun and is typically written in katakana.
I planted an Akashigata camellia in the garden.
Katakana spelling is standard for this cultivar name; usually written in kana.
Kanji spelling is attested but rarely used in practice; the katakana form is strongly preferred.
The name アカシガタ likely derives from 明石 (Akashi, a place name) and 潟 (gata, 'lagoon' or 'tideland'), but the exact origin of the cultivar name is uncertain.