Abstract: In order to provide the basis for utilizing plant resources, the compositions of oil seed plants in Longdi Nature Reserve in Southwest Hunan and their resources characteristics were analyzed. The result showed that (1) there were 477 species of oil seed plants, belong to 107 families and 281 genus, and among them, there were 382 species of oil plants and 131 species of essential oil plants, and 11 families including Lauraceae( 7 genus 27 species), Rutaceae( 6 genus 21 species), Labiatae( 11 genus 17 species) were the dominant families. The growth forms were dominated by woody plants, accounting for 73.38%. (2) The main oil-containing part was seed coat in 71.47% oil plants, and there were 211 species with the oil content above 20.0%, 43 species above 50.0%; and 11 species in 7 families with the oil fatty acid content beyond 70.0%, 20 species in 12 families with the linoleic acids content beyond 70.0%. (3) In oil plants, there were 57 species containing essential oil above 1.0%, 17 species above 4.0%. In conclusion, the oil plants resources in the reserve, especially oil-rich plants are abundant; the reserve is the place possessing enrichment oil plants, with development potential. At the same time, some recommendations for the sustainable management and utilization of oil plants were put forward.

Key words: seed plant, oil, essential oil, plant composition, resource, Longdi Nature Reserve

摘要： 分析了龙底自然保护区油料植物组成与资源特点。结果表明：（1）油料植物107科281属477种，其中精油植物131种，樟科（7属27种）、芸香科（6属21种）、唇形科（11属17种）等11个科为优势科，以木本植物为主，占73.38%。（2）以种子种皮为主要含油部位的植物占71.47%，植物含油量＞20.0%的有211种，＞50.0%的43种；油脂脂肪酸含量＞70.0%的有7科11种，亚油酸含量＞70.0%的有12科20种。（3）在精油植物中，57种植物含精油量＞1.0%，13种＞4.0%。龙底自然保护区内油料植物资源丰富，特别是富油植物资源种类较多，是油料植物富集之地，具开发利用潜力。

关键词: 种子植物, 油脂, 精油, 组成, 资源, 龙底自然保护区