noun
Rubus buergeri; a species of raspberry
A specific species of raspberry native to East Asia, often called 'winter raspberry' in English. The name 冬苺 literally means 'winter strawberry'.
冬苺は山地の林縁に自生する。
Rubus buergeri grows wild along the edges of mountain forests.
ふゆいちごの実は冬に熟す。
The fruit of the fuyuichigo ripens in winter.
木苺 is a general term for raspberries, while 冬苺 refers specifically to the species Rubus buergeri.
Compound of 冬 (fuyu, 'winter') and 苺 (ichigo, 'strawberry'), referring to its winter fruiting habit. The exact derivation is straightforward.