| "Leaves leathery, 5–10 × 2–3 cm, ovate, oblong or broadly lanceolate, upper surface glabrous and deep green, lower surface covered with greyish or reddish brown scales, 8–11 secondary veins on each side of the midrib, margins undulate to serrate, apex acute; petiole 0.5–2 cm long. Staminate inflorescences to 10 cm long, pubescent. Pistillate inflorescences stiff, spreading and to 8 cm long. Cupules subglobose, 0.8–1.5 cm diameter and almost completely enclosing the nut; bracts scale-like, 0.3–0.5 cm, covered in soft grey pubescence. Nuts one per cupule, acute at apex, 1.5–1.8 cm long. Flowering March to April, fruiting October (Japan)." [[https://www.treesandshrubsonline.org/articles/castanopsis/castanopsis-sieboldii/|Trees and Shrubs online]] (retrieved 20251114) | "Leaves leathery, 5–10 × 2–3 cm, ovate, oblong or broadly lanceolate, upper surface glabrous and deep green, lower surface covered with greyish or reddish brown scales, 8–11 secondary veins on each side of the midrib, margins undulate to serrate, apex acute; petiole 0.5–2 cm long. Staminate inflorescences to 10 cm long, pubescent. Pistillate inflorescences stiff, spreading and to 8 cm long. Cupules subglobose, 0.8–1.5 cm diameter and almost completely enclosing the nut; bracts scale-like, 0.3–0.5 cm, covered in soft grey pubescence. Nuts one per cupule, acute at apex, 1.5–1.8 cm long. Flowering March to April, fruiting October (Japan)... This species is very closely related to C. cuspidata (also of Japan and Korea), and has been treated as a variety of it (C. cuspidata var. sieboldii (Makino) Nakai). However, C. sieboldii has a larger nut and a thicker leaf due to two layers of epidermis rather than one (Kobayashi et al. 1998, Yamada & Miyaura 2000)." [[https://www.treesandshrubsonline.org/articles/castanopsis/castanopsis-sieboldii/|Trees and Shrubs online]] (retrieved 20251114) |
| "The flowers of Castanea and Castanopsis have similar characteristic odors..." Main components of a flower extract (distillation-extraction) were salicylaldehyde, o-aminoacetophenone, methyl salicylate, linalool and nonanal. \\ | "The flowers of Castanea and Castanopsis have similar characteristic odors..." Main components of a flower extract (distillation-extraction) were salicylaldehyde, o-aminoacetophenone, methyl salicylate, linalool and nonanal. \\ |
