Study on Flora Characteristics of Seed Plants in Jizu Mountains of Yunnan Province

doi:10.11924/j.issn.1000-6850.casb2025-0558

Abstract

Abstract:

This study aimed to investigate the seed plant diversity and floristic characteristics of Jizu Mountain in Yunnan, to provide a scientific basis for the assessment, development, utilization, and conservation of seed plant resources in this region. Based on the baseline biodiversity survey data of Jizu Mountain collected from 2023 to 2025 (including 43 transects and 36 quadrats) and relevant literature, the APG IV classification system and Wu Zhengyi’s floristic regionalization criteria were applied to analyze the composition of families, genera, and species of seed plants, their floristic geographical elements, and the characteristics of rare and endangered plant resources. The findings revealed that: (1) a total of 1637 seed plant species belonging to 656 genera and 138 families were recorded, with angiosperms accounting for 99.45% and gymnosperms represented by 9 species in 5 genera and 3 families. (2) The floristic composition showed transitional features: at the family level, tropical elements predominated (tropical families/temperate families, R/T=1.68), while at the genus level (R/T=0.79) and species level (R/T=0.23), temperate elements were dominant. There were 704 Chinese endemic species (43.02%) and one species endemic to Jizu Mountain (Roscoea stenophylla). (3) Invasive plant species numbered 35 (2.14%), and 121 rare and endangered plant species were identified, including one nationally first-class protected plant (Taxus wallichiana), 20 nationally second-class protected plants, four key protected plants of Yunnan Province, and one critically endangered species in Yunnan. The Jizu Mountain region in Yunnan exhibits rich seed plant diversity, complex floristic composition, and significant endemism, serving as an important component of the montane flora in western Yunnan. This study provides a scientific basis for the conservation of regional plant resources. Future efforts should focus on strengthening the prevention and control of invasive plants, as well as enhancing in-situ monitoring and protection of rare species.

Key words: seed plants, diversity, flora, Jizu Mountains

YANG Shujiao, YANG Jianjun, WANG Sheng, WANG Youbing, LI Jinliang, HE Meng, ZHANG Ying, HU Changping, CUI Maohuan, JIANG Jianfa. Study on Flora Characteristics of Seed Plants in Jizu Mountains of Yunnan Province[J]. Chinese Agricultural Science Bulletin, 2026, 42(1): 50-55.

Figures/Tables 7

References 17

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类型	科		属		种
类型	数量	占比/%	数量	占比/%	数量	占比/%
裸子植物	3	2.17	5	0.76	9	0.55
被子植物	135	97.83	651	99.24	1628	99.45
总计	138	100.00	656	100	1637	100.00

类型	科		属		种
类型	数量	占比/%	数量	占比/%	数量	占比/%
裸子植物	3	2.17	5	0.76	9	0.55
被子植物	135	97.83	651	99.24	1628	99.45
总计	138	100.00	656	100	1637	100.00

类别	所含种数	科数	科数占比/%	代表科	种数	种数占比/%
单种科	1	34	24.63	阿福花科、安息香科、芭蕉科、杜英科	34	2.08
寡种科	2~5	32	23.19	百合科、石蒜科、鸭跖草科、远志科	98	5.99
中等科	6~10	32	23.19	冬青科、凤仙花科、金丝桃科、漆树科	256	15.64
较大科	11~20	21	15.22	茜草科、木犀科、爵床科、石竹科	308	18.81
大科	≥21	19	13.77	菊科、蔷薇科、禾本科、豆科	941	57.48

类别	所含种数	科数	科数占比/%	代表科	种数	种数占比/%
单种科	1	34	24.63	阿福花科、安息香科、芭蕉科、杜英科	34	2.08
寡种科	2~5	32	23.19	百合科、石蒜科、鸭跖草科、远志科	98	5.99
中等科	6~10	32	23.19	冬青科、凤仙花科、金丝桃科、漆树科	256	15.64
较大科	11~20	21	15.22	茜草科、木犀科、爵床科、石竹科	308	18.81
大科	≥21	19	13.77	菊科、蔷薇科、禾本科、豆科	941	57.48

类别	所含种数	属数	属数占比/%	代表属	种数	种数占比/%
单种属	1	363	55.33	艾纳香属、八角属、白及属、白茅属	363	22.17
寡种属	2~5	225	34.30	楤木属、党参属、景天属、柃属	626	38.25
中等属	6~10	45	6.86	冬青属、凤仙花属、金丝桃属、小檗属	331	20.22
较大属	11~20	23	3.51	栎属、薹草属、香茶菜属、杜鹃花属	317	19.36