为揭示湖南省德夯地质公园峡谷异质景观下植物多样性的组成规律，以峡谷中13个典型景观型内维管植物为对象，采用线路踏查与样方调查相结合的方法开展野外调查，系统获取各景观型植物物种名录及功能性状数据，并基于此进行物种多样性、功能性状多样性和谱系多样性分析。结果表明：各景观型间物种多样性差异明显，夯峡坡物种丰富度最高，岩坳最低，二者的物种相对丰富度分别为37.2%和7.5%；物种分布高度特化，62.2%的物种为低频分布物种，仅分布于1~2个景观型；崖顶小土台与崖顶台地之间物种组成相似性最高，相似性系数为86.6%。功能性状多样性呈现景观差异，崖顶台地以灌木、革质叶、肉果为主，而其他景观型（除崖顶小土台灌木比例高外）以多年生草本、纸质叶、干果为主；瀑布周围以双面有毛叶和风力传播为主，而其他景观型以无毛叶和动物传播为主；岩坳以有限花序为主，而其他景观型以无限花序为主；单叶、互生、全缘、不裂的中小型叶及顶生或腋生的两性花在所有景观型中占主导。谱系多样性格局复杂，仅崖顶小土台、玉泉坡、盘古坡、河漫滩呈现谱系聚集趋势，净亲缘关系指数(NRI)大于0，其他9个景观型则呈现谱系发散趋势(NRI<0)。综合研究结果表明：德夯地质公园峡谷不同景观型植物多样性在物种组成、功能性状组合及谱系结构上呈现明显差异，深刻反映了异质生境对植物群落的多维度塑造作用。

 To reveal the compositional patterns of plant diversity under heterogeneous valley landscapes in Dehang Geopark in Hunan Province, vascular plants of 13 typical landscape types in the valley were taken as objects, field investigations were conducted by using a combination method of route reconnaissance and quadrat sampling to systematically obtain plant species lists and functional trait data for each landscape type, and analyses of species diversity, functional trait diversity, and phylogenetic diversity were performed on the basis. The results show that species diversity differs obviously among landscape types, Hangxia slope has the highest species richness, while rock depression has the lowest, and their species relative richness are 37.2% and 7.5% respectively; species distribution is highly specialized, and 62.2% species are low-frequency distribution species distributed in only 1-2 landscape types; the species composition similarity between cliff top platform. and cliff top tableland is the highest, and the similarity coefficient is 86.6%. Functional trait diversity exhibit landscape differentiation, cliff top tableland is dominated by shrubs, leathery leaves, and fleshy fruits, while the other landscapes (except cliff top platform, which also has a high proportion of shrubs) are dominated by perennial herbs, papery leaves, and dry fruits; waterfall surroundings are dominated by hairy on both side leaves and anemochory, while the other landscape types are dominated by hairless leaves and zoochory; rock depression is dominated by determinate inflorescences, while the other landscape types are dominated by indeterminate inflorescences; simple leaf, alternation, entire, and undivided mesophyll and microphyll, as well as terminal or axillary bisexual flowers, are dominant across all landscape types. Phylogenetic diversity patterns are complex, only cliff top platform, Yuquan slope, Pangu slope, and flood land show phylogenetic aggregation trends with net relatedness index (NRI) greater than 0, while the other nine landscape types exhibit phylogenetic divergence trends (NRI<0). The comprehensive research result indicates that plant diversity of different landscape types in the valley of Dehang Geopark exhibits distinct differences in species composition, functional trait combinations, and phylogenetic structure, profoundly reflecting the multidimensional shaping effects of heterogeneous habitats on plant communities.