MONOVERTICILLATA 137 



minute, limited in niunber, not influencing the colony appearance; peri- 

 thecia abundantly produced and lending a slightly granular appearance to 

 the thin, intercolony margins, borne adjacent to the substratum, regularly 

 enmeshed in and overgro^\^^ by a loose aerial mycelium, not superficially 

 evident in deeper colony areas; exudate abundantly produced in most 

 strains, approximately vinaceous fa^vn in color, sometimes dominating the 

 central colony area; odor lacking or indefinite; reverse becoming strongly 

 colored, at first in dull j^ellow or greenish brown to reddish shades, in age 

 becoming deep brown to maroon; penicilli strictly monoverticillate, few in 

 number, very small, bearing few and divergent chains of conidia up to 100/x 

 or more in length (fig. 36C) ; conidiophores arising mostly as branches from 

 aerial hyphae, lOO/x or less in length, occasionally from submerged hyphae 

 150 to 200m hy 2.2 to 2.8/x, seldom branched, with walls smooth; sterigmata 

 borne in groups of 2 to 6, usuall}^ 3 or 4, measuring 8 to 10/x by 2.0 to 2.5^ 

 with long, narrow conidium-bearing tubes; conidia elliptical to subglobose. 

 mostly about 2.5/x in long axis (fig. 36D). Perithecia abundantly produced, 

 oblong to globose (fig. 36E), occasionally somewhat angular, mostly 100/x 

 or less in diameter, at first consisting of heavy-walled parenchj^ma-like 

 cells throughout, ripening late, usually developing asci and ascospores after 

 two to three weeks; asci borne as lateral buds from fertile hyphae (fig. 35D), 

 globose to oblong Avhen ripe, about 6 to 8m in diameter, 8-spored; ascospores 

 heavy walled, showing limited surface irregularities and a trace of an equa- 

 torial furrow, lenticular, about 2.5 to 3.0^ by 2.0 to 2.5^ (fig. 36F). 



Colonies on steep agar like the above in general pattern and texture but 

 growing more rapidly, 5 to 5.5 cm. in 2 weeks, exudate lacking or limited 

 in most strains, quickly developing deep red-brown to maroon shades in 

 reverse; penicilli as on Czapek; perithecia abundantly produced, as de- 

 scribed above. 



Colonies on malt agar spreading broadly, up to 5.5 to 6.0 cm. in 2 weeks, 

 plane, thin, in dull shades near olive-buff (R., PI. XL), consisting of a dense, 

 uniform layer of perithecia adjacent to the substratum (fig. 36B), over- 

 grown but not obscured by a loose network of aerial hj^phae; penicilli 

 slightly larger than on Czapek and borne on conidiophores up to 300^ in 

 length. Perithecia ripening more rapidly than above, developing asci and 

 ascospores in about 12 days. 



Colonies on hay agar spreading broadly, very thin, producing fewer peri- 

 thecia and relatively more conidial structures than on the above media; 

 reverse uncolored except deep red in limited central area. Perithecia 

 ripening within 8 to 10 days and showing abundant free ascospores in 12 

 to 14 days. 



Colonies on cornmeal agar spreading broadly with vegetative mycelium 

 largely submerged, producing abundant perithecia in a thin layer on the 



