Studies on the Pteridophyte Flora of Laohutiao Nature Reserve of Guangxi

【Objective】The pteridophyte background of Laohutiao Nature Reserve is not clear.This study aims at enriching the pteridophyte data and promoting scientific and reasonable protection and utilization of the pteridophyte resources of the reserve.【Methods】Based on field investigation and indoor data,statistical analysis was conducted on the pteridophyte flora of the reserve.【Results】The results show that 170 pteridophyte species belong to 69 genera in 37 families.The ratio of tropical family and temperate family is 12∶1.The ratio of tropical genus and temperate genus is 3∶1.Eight genera belong to East Asia distribution and its variant.Four genera belong to Sino-Himalaya distribution and one belongs to Sino-Japan distribution.【Conclusion】The pteridophyte flora of the reserve reveals rich families and genera with few species,and shows obvious tropical characteristics with subtropical nature.