The Boletoideae of Florida with Notes on Extralimital Species III.

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Abstract
Three contributions on other subfamilies of the Boletaceae and on the Strobilomycetaceae by the same author are now supplemented by a monograph of fhe BOLETOIDEAE Sing. subfam. nov. of the Boletaceae. The Boletoideae contain the genera Phlebopus (Heim) Sing., Pulveroboletus Murr. em. Sing., Boletus Dill. ex Fr. sensu Gilbert (type genus of the subfamily), Xanthoconium Sing., Tylopilus Karst. em. Sing. and Leccinum S. F. Gray em. Snell, and are considered as the central group of the Boletaceae with the largest number of spp. at least as far as Florida is concerned. Aside from a complete description including full anatomical and chemical data on all Florida spp., many spp. not occurring in Florida are discussed, some are fully described if such a description appears necessary for comparison, and all spp. whose generic position is known are inserted in the paper. Phlebopus viperinus (Philippines, Hongkong), Pulveroboletus subacidus (Florida), Boletus patouillardii (Indo-China), Tylopilus cellulosus (Liberia) are new; the sections Colossi (type P. colossus) and Sulphurei (type P. sulphureus) are proposed in Phlebopus; in Pulveroboletus, the sections Flavovelati (type: P. ravenelii), Reticulati (type: P. auriflam-meus), Glutinovelati (type: P. corrugatus), and Cartilaginei (type: P. curtisii) are new; in Tylopilus the new sections, Fellei (type: T. felleus), Scrobiculati (type: T. conicus) and Oxydabiles (type: T. tabacinus), and in Leccinum the new sections Luteoscabra (type: L. nigrescens), and Roseo-scabra (type: L. chromapes) are proposed. The keys include all species known to the author, and make it possible to use this monograph in many regions outside Florida, also in Europe. 39 spp. are treated as occurring in Florida which, in addition to the genera treated previously, brings the number of Florida Boletaceae and Strobilomycetaceae ("boletes") up to 62. The synonymy of all species occurring in Florida is completely indicated; 29 new combinations are proposed (Phlebopus[long dash]1; Pulveroboletus[long dash]12; Boletus[long dash]3; Xanthoconium[long dash]2; Tylopilus[long dash]6; Leccinum[long dash]5). Some of the species show distinct signs of being greges combining geographical races and mycoecotypes in the sense of Singer (1941), especially in Boletus. The gastroid form of Boletus rubellus ssp. caribaeus is always sterile.

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