noun
yellow catalpa; Chinese catalpa
Archaic name for Catalpa ovata, a tree with large leaves and showy flowers. In modern Japanese, this tree is usually called キササゲ.
See also: キササゲ
古い文献では、キササゲのことを「楸」と記している。
In old documents, the catalpa is written as 楸.
noun
Archaic name for Mallotus japonicus, a shrub or small tree with large leaves. The modern common name is 赤芽柏 (アカメガシワ).
See also: 赤芽柏
「久木」は、昔アカメガシワを指した言葉だ。
久木 is an old word that referred to the Japanese mallotus.
The origin of ひさぎ is uncertain. It is an old Japanese word for specific trees, later replaced by more descriptive names.