ORDER MYRIANGIALES 



331 



vertical sterile plates. The latter grow at the base so that at maturity a col- 

 umn of vertical honeycomb structure bursts the upper peridium and pushes 

 upward. In the meshes of the honeycomb there are developing asci at the 

 base while near the top the ascus walls are dissolved and the ascospores 

 lie free. As the upper ends of the column weather away the ascospores are 

 released. Tropical and warm temperate species. Developmental studies 

 of the earlier stages are lacking, in default of which the exact relationship 

 of this family is uncertain. 



Fig. 107. Aspergillales, Family Onygenaceae. (A- 

 C) Onygena equina Pers. ex Fr. (A) Habit sketch. (B) 

 Vertical section. (C) Asci. (D) Ascospores of Onygena 

 caprina Fckl. (After Engler and Prantl: Die Natiir- 

 lichen Pflanzenfamilien, Leipzig, W. Engelmann.) 



Family Terfeziaceae. Although the fungi of this family with their 

 large subterranean ascocarps resemble in structure in many ways some of 

 the genera of the order Aspergillales, and especially in ascus and ascospore 

 structure those organs in Lilliputia, the author follows Fischer (1938) and 

 Miss Gilkey (1939) in placing them in the Tuberales, but with consider- 

 able doubt as to the correctness of this transfer. 



Order Myriangiales. This order, in the first edition of this textbook 

 considered to be closely related to the Pseudosphaeriales, appears, from 

 the studies of Julian H. Miller (1938) discussed below, to be more nearly 

 related to the Aspergillales. Some of the earlier mycologists suggested a 



