winter camellia; Camellia sasanqua
Refers to a camellia-like plant native to China, often associated with winter blooming. In Japanese, it may specifically denote Camellia sasanqua or similar cold-season camellias.
A winter camellia is blooming in the garden.
Compound of 寒 (kan, 'cold, winter') and 椿 (tsubaki, 'camellia'). The exact historical derivation is uncertain, but the name reflects its winter-blooming nature.