Chen Collection, Middle Volume. Radical: Tree (mù). Kangxi stroke count: 14. Page 545, Entry 01.
Rhyme Compilation (Yunhui): Pronounced qi. A type of tree.
Record of Local Products of the Yi Region (Yibu Fangwu Ji): Common people plant alder trees, and in less than three years, the timber produced is twice that of ordinary trees. Because they grow and transplant quickly, the local people profit from them.
Du Fu: Poem Seeking Alder Tree Seedlings: I have long heard that alder trees grow large in three years; I seek seedlings to provide shade for ten acres by the stream.
Wang Anshi: Alder Tree Poem: Among the trees by the Zhuojin River are alder trees, planted and cultivated in wild gardens, waiting for them to grow lush. Being in a remote place, they are luckily spared from being felled like the trees of Huan Tui, and at the end of the year, they can be transplanted like the willows of Yu Xin.
Also, Standard Character Comprehension (Zhengzitong): Pronounced kai.
Also, Tales from Qi East (Qidong Yeyu): The character for alder, pronounced dai. The meaning is the same.