| Southeast Tibet is one of the areas that have abundant Lonicera plant species, the species accountes for 24% of the total country and 12% of the total world. Based on systematical collation of Lonicera plants resources material in Southeast Tibet, the present situation was summarized. We created the brief identification tables on a sections and species level of 24 species and 1 subspecies and 6 varieties, which belonged to 1 subgenus and 4 sections and 9 subgroups, comparatively analyzed the phenotypic traits, the law of distribution and main impact factors and demonstrated the relationship between the evolution of this genus and uplift of the Qinghai Tibet Plateau. We found that the distribution of Lonicera plants in this region appeared to its life-form, showing the transition of Shrub-shrub and small trees-liana, defoliation-half aiphyllus-evergreen, with elevation from low to high, the northwest to the southeast. And elevation and precipitation were the the main ecological factors that impacted the distribution of this genus in the region. Under the climatic conditions of altitude of 2 000 -3 500 m, annual precipitation of 800-1 200 mm, its richness was the highest. In the 4 groups of Lonicera plants in this area, Subsect. Bracteatae, Subsect. Purpurascentes, Subsect. Alpigenae, Subsect. Rhod -anthae, Subsect. Caeruleae and Subsect
Fragrantissimae of Sect. Isika, Subsect. Ochranthae of Sect. Coeloxylosteum and Subsect. Cupulatae of Sect. Isoxylosteum were widely distributed in Southeast Tibet. The distribution of Sect. Nintooa which had only one Subsect. Volubilis was narrow that only distributed in the warmer and wetter Medog, Bome, southern of Zay, andthis was relative to its primitiveness in phylogeny and the effect of refuge in the complex habitat. |
