Studies On Agarics Flora Of Huoditang In Qinling Mountains

In this study, the species, ecological distribution and flora of the Agarics of Huoditang in Qinling Mountains were investigated, and the configurature features of those were described, which gives people clearer recognition of the Agarics of this area and provides the foundation for further exploitation of Agarics resources. The results as follows:212 species of Agarics were identified .They belong to 55 genera,18 families, 5 orders, in which, 1 species are new in the world, it is Clitocybe fusco-concava Z. M. Cao&B. G. Zhang sp.nov.;1 species is new in China ,it is Marasmiellus atrostipitatus Har. Takahashi; 36 species are new in Shaanxi Province. In addition, 19 speciments need further identification. The Agarics resources are very abundant, the dominant families are Tricholomataceae,Cortinariaceae,Russulaceae,Boletaceae,Coprinaceae,Strophariaceae,Entolomataceae,and while the dominant genera are Clitocybe,Marasmius,Cortinarius,Inocybe,Russula,Mycena ,in which ,119 species are edible,50 species are pharmaceutical and 34 poisonous .The influences of the ecological factors, i.g. forest type,litter layer,moisture,temperature,and season, on the occurrence of agarics are extensively discussed in this dissertation.Pinus armandii forest has the most diversified Agarics species,81 species, accounting for 38.03% .Mixes (Pinus tabulaeformis and Quercus aliena var.acuteserrata)occupies the second place,72 species , accounting for33.96%.Picea wilsonii forest is the least,24 species, only 11.32% Five species exist in four sites simultaneously, accounting for 2.36%.They are Clitocybe obsolota,Marasmius oreads,Stropharia aeruginosaf,Cortinarius herpeticus,Inocybe cookie. Among these species, 112 species occurs L layer, come to 52.58% of the total. 73 species occurs F layer,occupies 34.27%.48 occurs H layer,takes 22.54%.And four species exist in L,F and H layers simultaneously, accounting for 1.89%,They are Mycena citronella,Clitocybe obsolota,Psathyrella multissima and Cortinarius infractus.The authours divide these agarics into 8 geographical elements.It shows:in 55 genera, Cosmopolitan genera and North Temperate genera are dominant genera, occupy 52.7%and 27.2%respectively;in 212 species,North Temperate element and Cosmopolitan element are dominant element, take 64.8% and 17.4%respectively. These characters are relatively similar with Daqing Mt of Inner Mongolia, at the same time,it ownes other elements,which demonstrates this region has some relationship with North America ,Japan and Africa in the flora of Agarics.