Font Size: a A A

Study On The Flora Of Impatiens L. In The Gaoligong Mountains Region, Yunnan

Posted on:2008-06-24Degree:MasterType:Thesis
Country:ChinaCandidate:Y Y CongFull Text:PDF
GTID:2120360215487250Subject:Botany
Abstract/Summary:PDF Full Text Request
This paper studied the floristic structure of species, as well as features of Gaoligong Mountains Impatiens flora and relation with its neighboring regions. The status and origin problems of Impatiens flora are discussed, and gains valuable harvest.1. Species and distribution: Impatiens in the Gaoligong Mountains is rich. There are 59 species and varieties, 61.3 % of the total species inYunnan, 28.8% of the total species in China , 27.6% of the total species in Southeast Asian. Impatiens mainly distributes in Gongshan County and Fugong County in Gaoligong Mountains, there are 54 species in two county, 78.3% of the total species in Gaoligong Mountains. Vertical distribution of the Impatiens flora is evident in Gaoligong Mountains, and they distribute between 720 m and 4200 malt. but mainly distributed between 2500 m and 4200 m (32 species, 46.4% of the total species in Gaoligong Mountains). Impatiens in the Gaoligong Mountains is rich in endemic species, there are 53 species(75.4% of the total species) endemic to the China, 31 species(44.9% of the total species) endemic to the Yunnan, 12 species(17.4% of the total species) endemic to Gaoligong Mountains, and the amount of endemism varies with latitude with more endemic species.2. Floristic characters and elements of Impatiens in GaoligongMountains is that: the total species can be divided into 5 types of 15 distribution types in Chinese seed plants flora, among the five types, tropic Asia distribution pattern endemic to China distribution pattern are the riches (respectively 76.9%and14.4% of total species). Among the five types, there are 10 species to be tropic character (14.4% of total species) and 59 species to be temperate character (85.6% of total species), this shows that floristic characteristic of Impatiens in Gaoligong Mountains is temperate.3. The result of similarity comparing with neighbor flora of Impatiens indicate that flora of Impatiens in Gaoligong Mountains is similarest to Yulong Mountain, and Sejila Mountain, similarer to Emei Mountain and not similarest to Madagascar. Among 6 floras compared with Gaoligong Mountains, expecet Pakistan and Yulong Mountain, the R/T value of Gaoligong Mountains Impatiens flora is lowest, it indicates that the degree of temperate character of Impatiens flora in Gaoligong Mountains is highest among other 4 floras because of the geography location and altitude of Gaoligong Mountains. 4. Status of Impatiens flora in Gaoligong Mountains is that: Owing to the especial geography location and unique natural environments, rich diversities Impatiens species distributes in Gaoligong Mountains region including evolutional types and primordial types, so this region should be one of the Impatiens distribution and differentiations centers, and play an important station in Impatiens flora of China.5. Two new species, Impatiens yaoshanensis K. M. Liu & Y. Y. Cong which has been accepted by Annales Botanici Fennici and Impatiens diacalpioidesK. M. Liu & Y. Y. Cong are found, and 6 new record species of Impatiens are also found, so the information of Impatiens flora of China is enriched at great extent and germplasm.
Keywords/Search Tags:Impatiens, Flora, Floristic element, Floristic character, Gaoligong Mountains
PDF Full Text Request
Related items