1977年臺灣植物誌第三卷309頁所述之三葉木藍實爲兩種植物的混合體，其中之一之模式標本 產自印度，名爲長梗木藍者，文中也比較二種之不同點。

Huang and Ohashi (1977) in Flora of Taiwan (3: 309) have described Indigofera trifoliata L. based on Hosokawa 3271 from Pingtung, and Hsu 9441, Kao 7682 and Hnang 353 from Taitung which when critixcally examined revealed an admixture of two different species viz., Indigofera trifoliata L. and I. pedicellata Wt. & Arn. The latter species was first described by Wight and Arnott (1834) from Peninsular India and was considered to be endemic. It is interesting to note the occurrence of this speceies in Taiwan and therefore a detailed description and its differences with the allied species are given to facilitate the correct identity.