J Syst Evol ›› 2007, Vol. 45 ›› Issue (3): 315-320.DOI: 10.1360/aps050119

• Research Articles • Previous Articles     Next Articles

A new species of Lagerstroemioxylon (Lythraceae) from the Pliocene of Yuanmou, Yunnan, China

1 2CHENG Ye-Ming, 1LI Cheng-Sen*, 3JIANG Xiao-Mei, 1WANG Yu-Fei   

  1. 1(State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, China)

    2(Department of Stratigraphy and Palaeontology, Geological Museum of China, Beijing 100034, China)

    3(Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China)
  • Received:2005-08-16 Published:2007-05-18

Abstract: Lagerstroemioxylon yuanmouensis sp. nov. is established from the Pliocene sediments near Xinhua, Yuanmou Basin, Yunnan, China. Its growth rings are distinct. Pores diffuse, solitary, and in radial multiples; perforation plates simple; intervessel pits alternate, vestured; vessel-ray pits alternate; tyloses thin-walled, abundant in vessels. Septate fibers distinct. Axial parenchyma predominantly paratracheal, narrow vasicentric and marginal. Rays mostly uniseriate, homocellular. The genus Lagerstroemioxylon was reported in the Tertiary sediments of India, Myanmar, Indonesia and Germany, which might indicate that Lagerstroemia living today in tropical forests of Asia and North Australia grew wider during the Tertiary.

Key words: biogeography, Lagerstroemia, Lagerstroemioxylon, Lythraceae, Pliocene, Yunnan, China