中国牛肝菌目的研究和增补

在研究我国川西、滇、桂、海南岛的牛肝菌目标本中,发现二新种:网盖金牛肝菌(Aureoboletus reticuloceps)和黑牛肝菌(Boletus nigricans),后者属黑牛肝菌组,新组(Boletus sect.Nigres)。并报道了婆罗洲牛肝菌、美丽牛肝菌、怪形牛肝菌、焰色牛肝菌、黑紫牛肝菌、长柄条孢牛肝菌和西藏金牛肝菌的分布型和所呈现的印度——马来西亚热带成分的相适关联。

NOTES ON AND ADDITIONS TO CHINESE MEMBERS OF THE BOLETALES

Nine taxa of the Boletales collected from eastern Sichuan,Yunnan, Guangxi and Hainan by the authors are reported,of which two are new to science. Boletus nigricans Zang,Yuan et Gong,sp.nov.is similar to Boletus nigerrimus He- im in many respects.But the color of basidiocarp,context and hymenium are always blackish to Mack,and not purplish.The stipe is finely reticulate.The spores in face view are elliptic,not subfusoid,and 9—13×5—6.5 μm.A new section,Bole- tus sect.Nigres Zang,sect.nov.,is established for B.nigricans and B.nigerrimus. Aureoboletus reticuloceys Zang,Yuan et Gong,sp.nov.somewhat resembles Aureo- boletus thibetanus (Pat.) Hongo et Nagasawa,but the former has larger spores and its stipe is with distinctive reticulate veins.Boletus nigerrimus Helm.,B.borneensis Corner,B.formosus Corner,B.portentosus B.et Br.,B.rufo-aureus Mass.and Bo- letellus longicollis (Ces.) Pegler et Young are tropical species.The mycoflora of these regions is characterized by the occurrence of tropical Indo-Malayan fungi which. are not present in other parts of China.Additional geographic distribution patterns of certain sibling species are mapped.The senior author would like to thank the Director,Dr.Donald H.Pfister,Farlow Reference Library and Herbarium of Crypto- gamic Botany,Harvard University,U.S.A.for the loan of the type specimens of Boletus thibtanus.The types of new species described in this paper are deposited in the Cryptogamic Herbarium,Kunming Institute of Botany,Academia Sinica,Ku- nming (HKAS).This study was supported by the National Natilral Science Founda- tion of China.