1b. Davidia involucrata var. vilmoriniana (Dode) Wangerin in Engler, Pflanzenr. 41(IV. 220a): 19. 1910. 光叶珙桐 guang ye gong tong Davidia vilmoriniana Dode, Rev. Hort. (Paris) 80: 406. 1908; D. involucrata subsp. vilmoriniana (Dode) J. Holub.Leaves abaxially glabrous or scarcely pubescent when young, sometimes abaxially glaucous.● Forests; 1500-2000 m. Guizhou, W Hubei, Sichuan.【引自:Flora of China】
与原变种的区别在于本变种叶下面常无毛或幼时叶脉上被很稀疏的短柔毛及粗毛,有时下面被白霜。 【引自:中国植物志】