24 Charles E. Bessey 



Family 104. Ascoideaceae. Asci much elongated, not corti- 

 cated. Ascoidea. (Pf. I, i, 145.) 



Famil}- 105. Protomycetaceae. Asci ellipsoid or spherical, not 

 corticated. Protomyccs (parasitic), Endogone. (Pf. I, i, 147.) 



Family 106. Monascaceae. Asci spherical, terminal, corticated. 

 Monascus. (Pf. I, i, 148.) 



Family 107. Saccharomycetacae. ''Yeasts." Asci early isolated 

 from the few-celled mycelium, which itself early breaks up into 

 short segments; saprophytic. Saccharomyces. (Pf. I, i, 153.) 



Order Tuberales. Truffles. True fungi, saprophytic, with a 

 branching filamentous, generally subterranean mycelium ; spore- 

 fruits tuberous, subterranean, fleshy, containing asci in definite 

 cavities or layers. 



Family 108. Tuberaceae. Spore-fruits with spore-bearing cav- 

 ities open to the exterior by rifts or slits in the tissue and rind. 

 Tuber, Genea. (Pf. I, i, 281.) 



Family 109. Balsamiaceae. Spore- fruits with spore-bearing 

 cavities not open to the exterior. Balsamia. (Pf. I, i, 288.) 



Class 16. BASIDIOSPOREAE. Basidium Fungi. True fungi, 

 mostly saprophytes, consisting of septated mycelium which bears 

 the spore-fruits; spores (" basidiospores") borne externally upon 

 special cells ("basidia"), which are usually massed in a hyme- 

 nium. The basidia are here regarded as the homologues of the 

 asci of the Ascosporeae. (About 14,000 species.) 



Order Hymenogastrales. False Tubers. Spore-fruit inde- 

 hiscent, subterranean ; gleba fleshy or gelatinous, putrescent, 

 wholly, or at first filled with irregular cavities; no capillitium. 



Family no. Hymenogastraceae. With the characters of the 

 order. Hysterangium, Hynienogaster, Octaviana, RJiizopogon. 

 (Pf. I, I**, 296.) 



Order Sclerodematales. Hard Pufif-balls. Spore-fruit epi- 

 geous. roundish, often stalked, containing groups of clustered 

 basidia, bearing terminal spores ; no capillitium ; with or without 

 columella. 



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