[Distribution and Community Characteristics or Epimedium myrianthum in Chongqing].

OBJECTIVE: To make clear the distribution area in Chongqing and community characteristics of Epimedium myrianthum, in order to provide evidence for sustainable utilization of resources. METHODS: Based on field investigation, recorded the GPS, and used the quadrat method to observe and analyze the abundance, frequentness and importance value of Epimedium myrianthum in the seven well-concentrated sample plots of different habitats. RESULTS: Epimedium myrianthum distributed in Changshou County, Dianjiang County, Zhongxian County and Fengdu County of Chongqing at present. The altitude of its distribution areas ranged from 351~663 m. The types of its habitats included coniferous forest, broad-leaved forest and bamboo forest. The plants in these communities were composed of 56 species belonging to 48 genera,33 families. Among associated plants, the dominant species of tree layer were Bambusa distegia, Quercus variabilis , Cupressusfunebris etc. The dominant species of shrub layer were Pittosporum illicioides, Loropetalum chinense, Myrsine africana, Ardisia japonica, Smilax china etc. The dominant species of field layer were Iris japonica, Miscanthus floridulus, Veronicastrum longispicatum, Carex lancifolia, Epimedium myrianthum etc. Species abundance index of D was between 1.1143 to 3.7781 in seven populations,the species in these communities were relatively less,and the numbers of individuals were relatively more. Compared with others, the population of the 3rd and 6th had relatively low index of H' (Shannon-wiener index) and E (Pielou index). The distribution of these species in the community was obviously uneven. The D value,H' value and E value of tree layer species richness were lower than those of shrub layer and field layer, the species diversity was worse. CONCLUSION: It is suggested to incorporate Epimedium myrianthum in the new edition of Chinese Pharmacopeia.

[Effect of different storage methods and time on seed germination of Bletilla striata].

OBJECTIVE: Exploring seed storage method to offer a technological support for the seedling development of Bletilla striata. METHODS: Bletilla striata seeds were stored by means of sand storage, nature storage and low temperature storage for 120, 150 and 180 d respectively. The germination rates were measured with methods of seed germination on the Petri dish and difference of rates was compared by means of the SSR method. RESULTS: The embryo rate of Bletilla striata seeds was (84.9 +/- 4.7)%; the germination rate of fresh seeds was (92.1 +/- 2.1)%; the germination rates of seeds treated by sand storage, nature storage and low temperature storage for 120, 150 and 180 d were (89.3 +/- 2.7)%, (77.4 +/- 3.3)%, (68.9 +/- 2.7)% respectively and they showed significant difference or extreme significant difference one another. When seeds stored 120, 150 and 180 d, germination rates of seeds treated with three methods were (81.7 +/- 8.0)%, (78.5 +/- 7.9)%, (75.7 +/- 8.5)% respectively, and in these three storage times, germination rates of seeds stored 120 d and 180 d showed significant difference. In addition, there was no significant difference between germination rates of fresh seeds and sand storage seeds stored 120 d. CONCLUSION: The effect of germination of seeds stored with sand was good, and germination rate was high steal after 180 d.