Chinese chestnut
Refers to the tree Castanea mollissima or its nut. In everyday contexts, the katakana name is standard.
Chinese chestnuts are sweet and delicious.
この公園にはシナグリの木が植えられている。
Chinese chestnut trees are planted in this park.
Katakana spelling is common for this plant name; usually written in kana.
Kanji spelling is rare and may be considered dated or potentially offensive due to the use of 支那; the katakana form is strongly preferred.
From 支那 (Shina, an old name for China) + 栗 (kuri, chestnut). The kanji 支那 is now generally avoided, and the word is normally written in katakana.