538 



CLASS BASIDIOMYCKTEAE 



Fir,. 173. Hymenogastrales, Family Hymenogastraceae. (A) Gasterella lutophila 

 Zeller & Walker; vertical section through a spore fruit showing the tendency toward 

 the formation of folds from the hymenial wall. (B, C) Hymenogaster rehsteineri 

 Bucholtz, showing vertical sections of very young and somewhat further developed 

 spore fruits. (D, E) Hymenogaster tener Berk. (D) Section through mature spore fruit. 

 (E) Portion of mature gleba. (A, courtesy, Zeller and Walker: Mycologia, 27(6) :573- 

 579. B-E, after Tulasne, from Fischer, in Engler und Prantl: Die Natlirhchen Pflanzen- 

 familien, Zweite Auflage, vol. 7a, Leipzig, W. Engelmann.) 



