作 者 ：FENG Guang-Ping, LIU Chang-Jiang, SONG Shu-Yin, MA Qing-Wen
期 刊 ：植物分类学报 1999年 3期
Keywords:Oxalis,
Abstract:
Oxalis jiayinensis, sp. nov., is described from the Late Cretaceous (Turonian-
Senonian) in Jiayin County, Heilongjiang Province, northeastern China. The seed is about
1 mm long, less than 1 mm in diameter, crescentic with obtuse apices and 9～10 transverse
ribs. The seed wall is composed of equiaxial, strongly thickened sclereids. The fossil repre-
sents the oldest occurrence of the family Oxalidaceae in the world.