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Podaxis
''Podaxis'' is a genus of secotioid fungi in the family Agaricaceae. Species, which have the appearance of a "stalked-puffball", have a worldwide distribution, and tend to be found growing solitary or scattered on sandy soils, especially in arid regions. Although close to 50 species have been described, it has been argued that many of them may represent extremes in the natural range of variations found in ''Podaxis pistillaris''.〔Morse EE. (1933). A study of the genus ''Podaxis''. ''Mycologia'' 25(1): 1-33.〕
==Description==
Fruiting bodies have the appearance of an unopened ''Coprinus comatus'', with a stipe and a loose, brown to blackish powdery gleba at maturity. Basidiospores are obovate, thick-walled with a large apical pore, and typically 10-17 x 9-12 µm in size. Clamp connections are present.〔Johnson J. (1999). Phylogenetic relationships within ''Lepiota'' ''sensu lato'' based on morphological and molecular data. ''Mycologia'' 91(3): 443-458.〕
''Podaxis'' is a common inhabitant of soil and termite mounds throughout the drier regions of the tropics and subtropics of the world.〔http://cms.jcu.edu.au/discovernature/fungi/JCUDEV_017269〕 ''P. pistillaris'' is a ground-inhabiting species, but most ''Podaxis'' species in the rest of the world are associated with termite mounds. This includes the Australian species ''P. beringamensis''.〔Priest MJ, Lenz M. (1999). The genus ''Podaxis'' (Gasteromycetes) in Australia with a description of a new species from termite mounds. ''Australian Systematic Botany'' 12(1): 109-116.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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