湖南九嶷山野生杜鹃花属植物资源丰富,根据调查统计,有杜鹃花属植物 16 种,隶属于 5亚属7组8 亚组.对该区野生杜鹃花属植物种类、生活型、生境及分布、花期与花色、资源储量等情况进行分析,并提出资源保护和科学利用的建议,以期为区域杜鹃花属资源可持续利用提供参考.

华珊瑚蛇属Sinomicrurus为眼镜蛇科Elapidae的一种中小体型陆栖毒蛇,体色较艳丽,主要分布于东亚及东南亚地区,栖息生境多为森林、山区、河流和湖泊附近茂密植被.

Primula ranunculoides and Primula cicutariifolia are two rare and endangered plant species endemic to China.P.ranunculoides was treated as a synonym of P.cicutariifolia in taxonomy at one time.This paper,which combs the two species collecting history and their situation resources in Hunan,based on the latest taxonomic evidence.In order to protect theit germplasm resources and provide research value,we proposed Yangmingshan genetic diversity management units for P.ranunculoides and Xinning(Xuefengshan) genetic diversity management units for P.cicutariifolia.

The seed plant resources in the Hunan Guiyang Chongling National Wetland Park were investigated.Results showed as followed:there were 148 families, 506 genera and 771 species of seed plants in which 11 species gymnosperm belonged to 10 genera in 7 families and 760 species angiosperm belonged to 496 genera in 141 families in the Hunan Guiyang Chongling National Wetland Park.Among of them, 245 species were the wetland plants, and 10 species were the national key protected plants.The plant species mainly distributed over hills and foot-hills, and limestone endemic plants were rich.The floristic analysis showed the geographical element was complex, and there were 10 areal-types of families and 14 areal-types of genera, and clearly of transitional nature.The types of vegetation were different, including 4 vegetation type groups, 18 formations of forest vegetation, and 3 vegetation type groups, 46 formations of wetland vegetation.

A new record species of Ericaceae from Hunan 'Rhododendron praevernum', and its floral morphology and leaf size are described and supplemented in this paper.The number of stamens in R.praevernum, which are remarkably variations, and differences in existing description references result in its difficulty and confusion to identify.This paper will provide some valuable information for further taxonomic revision of R.praevernum.

The out-door investigation of plant resources in Lanshan National Park of Hunan in 2007 to 2008 in different season and time period in eight times.The plant resources in Lanshan National Forest Park are rich plant resources and luxuriant vegetation,rare and endangered plants enrichment.complex geographical elements and transitional,and a typical characteristic of Nanling Mountain Range.Lanshan National Forest Park as the zonal vegetation in typical subtropical evergreen broadleaved forest,vegetation types,characteristics of community many simple stability;and the area of Castanopsis eyrei forest is the biggest one in Hunan.The suggestion of monitor and protect the rare and endangered plant species and preserve the forest vegetation were pointed out,establish the botanical garden,protect the forest vegetation of the strategic target of sustainable development also measured.

The result on Pteridophyte flora on Hunan Lanshan forest park shows that: 1) Ferns on Lanshan forest park have 28 families,59 genera and 139 species(including varieties and variants).In this area,family,genera and species of fern in China accounted for 44.44%,25.54%,5.35%;Accounted for 52.83%,39.60%,19.36% of Hunan fern;2)The statistics analysis of families and genera shows that the dominant families on Lanshan forest park are Dryopteridaceae,Thelypteridaceae,Polypodiaceae,Athyri-aceae and the major genera is Dryopteris,Athyrium,Selaginella,Pteris;3) Analysis of geographical ele-ments of genera and species shows that the character of this area is subtropical;4)In the regional compari-son,the area belongs to central China-east China region,and easy to distinguish with the southwest and south fern flora.In this area,the similarity coefficient with southwest is higher than in the south China.

A new record of Listera from Mainland China 'Listera japonica Bl.',and it's habitat are reported in this paper.

Camellia oleifera is one of the most important woody oil plants,which blooms from late autumn to winter.The study on pollination characteristics of Camellia oleifera is one of the keys to solve the low fruit rate.In this paper,pollen activity and viability,amount of pollen,nectar volume and sugar concentration,stigmas receptivity and pollen/ovule ratio(P/O) were studied.The results demonstrated that the highest pollen viability was 71.0%±0.056% after eight hours of flowering;rate of pollen fertility was 93.97%±1.62%(n=30);stigma receptivity reached the highest rate on the second day after flowering;nectar volume of each flower was 421.2±14.0 μL(n=30),with a sugar concentration of 29.12%±0.94%;P/O was 17675.08±302.11(n=20),which revealed that Camellia oleifera was obligate xenogamy.

Hunan Lanshan Forest Park is rich in Orchid plants.The investigation shows that there are 25 orchid species belonging to 18 genera in the Park,accounting for 30% of the total genera and 16.67% of the species respectively in Hunan Province.The orchid plants are almost found in all kinds of vegetation community.Among them terrestrial are dominant with 17 species(68%),and then five(20%) are epiphytic,and three(12%) are saprophytic.There are 10 distribution-types,in which Tropical Asia and East Asia elements are abvious,and Chinese endemic species are rich.There are four species—a new species;two new records,of which one from mainland China,the other from Hunan Province;a doubtful species—from the 25 orchids.In view of the values of orchid plants,great attention should be paid on their conservation in Lanshan Forest Park.