AS YMMETKICA-DIV ARICATA 27 1 



exudate lacking in most strains, abundant in others, clear to light straw- 

 colored; odor definite to pronounced, earthy; reverse at first uncolored, 

 subsequently becoming dull orange-yellow near cinnamon to clay color 

 (R., PL XXIX); penicilli variable in form, mostly biverticillate and asym- 

 metric, arising mostly from the substratum or the basal felt, less commonly 

 monoverticillate and borne on short branches from loose aerial hyphae 

 (fig. 72C), biverticillate structures commonly consisting of a terminal 

 group of metulae arranged in a true verticil, or arising at somewhat differ- 

 ent levels, occasionally branched with each branch bearing metulae antl 

 sterigmata; conidiophores extremely variable in length, from 50 to lOOju 

 when borne as branches from aerial hyphae up to 400 or oOOyu when arising 

 from the substratum by 2.5 to 3.0ai in diameter, smooth- walled ; branches, 

 when present, 10 to 15/i or more in length; metulae 2 to 5 in number usually 

 10 to 15m hy 2.2 to 2.8m; sterigmata parallel, in compact clusters of 4 to 8, 

 mostly 8 to 10m by 1.8 to 2.2m, witli tips slightly narrowed (fig. 72D); 

 conidia globose to subglobose, mostly 2.2 to 3.0m, smooth-walled in loose 

 tangled chains up to 100m in length. Perithecia spherical to oblong (fig. 

 72P]), from 100 to 225m in diameter, maturing rather quickly, at first 

 composed of heavy- walled parenchyma-like cells throughout, firm but not 

 sclerotioid as in other members of the series, ripening from the center out- 

 ward, developing a network of fertile hyphae bearing asci in definite chains, 

 producing ripe asci and ascospores in two to three weeks and in 5 to 6 

 weeks completely filling the perithecium leaving only an outer wall 1 to 2 

 cells thick; asci oval to elongate, mostly 7.0 to 7.5m in diameter, 8-spored; 

 ascospores broadl^^ lenticular, mostly 2.8 to 3.3m 1>.v 2.2 to 2.8m ^vith equa- 

 torial areas flattened (fig. 72F) or showing two rather widely separated, 

 low equatorial ridges, commonly lending to the spore a cask or barrel- 

 like profile as noted by van Beyma. 



Colonies on steep agar as on Czapek but grow ing somewhat more rapidly 

 up to 5.5 to 6.0 cm. in 12 to 14 days at room temperature, in texture and 

 pattern as above, conidial structures as described but generally more 

 abundant; ascdsporic stage essentially as described above. 



Colonies on malt agar as on Czapek in rate of growth, not furrowed, 

 usually heavier sporing, more commonly zonate, usually producing peri- 

 thecia more abundantly (fig. 72B); details of conidial and ascosporic 

 stages as described above. 



Species description based upon van Beyma 's type received in December 

 1945, from the Centraalbureau and subsequently incorporated in our 

 Collection as NRRL 2090. Duplicated also by XRRL 1022 received in 

 1933 from Baarn and probably representing the same original strain; and 

 NRRL 1023, received in 1934 from Dr. Rhoda H. Benham, ^'■ander})ilt 

 Clinic, New York City. NRRL 716, received in 1934 from Ross W. 



