摘 要 ：描述了中国四川省木兰科玉兰属两新种，北川玉兰(Yulania carnosa D. L. Fu et D. L. Zhang sp. nov.)和时珍玉兰(Y.shizhenii D. L. Fu et F. W. Li sp. nov.)。两新种的独特特征是：北川玉兰每花具佛焰苞状苞片2枚，1枚膜质，着生在花梗中间，另1枚肉质，着生在花梗顶端。时珍玉兰花被片、雄蕊和雌蕊的花柱、柱头均为纯白色；雄蕊约20枚。两新种由傅大立于2001年3月在四川省发现并采集，模式标本存于中国林业科学研究院，模式标本号：北川玉兰No.200103141，时珍玉兰No.200103161。
Abstract:Two new species of the genus Yulania Spach of Magnoliaceae were described from Sichuan province of China. They are Yulania carnosa D. L. Fu et D. L. Zhang, sp. nov. and Y.shizhenii D. L. Fu et F. W. Li, sp. nov.. The main distinguishing features are that Y.carnosa has two spathacei-bracts on a flower, one membranous inserted in the middle of the pedicel and the other carnose inserted at the top of the pedicel. The tepals, the stamens, and the styles and stigmas of pistils of Y.shizhenii all are lily and there are only about 20 stamens. The species were found and collected in March, 2001 in Sichuan Province of China by Da-Li Fu. The holotypes of two species are kept at Chinese Academy of Forestry (CAF), No.200103141(Y.carnosa) and No.200103161(Y.shizhenii).