ASYMMETRICA-DIVARICATA 311 



shades; conidiophores arising primarily from the basal felt, leSS commonly 

 from aerial hyphae, up to 300 to 400^ by 2.0 to 2.5m, sometimes branched, 

 with walls smooth; penicilli variable in pattern, typically divaricate, 

 sometimes monoverticillate or once-branched, but commonly consisting of 

 a verticil of 3 to 5 metulae often irregular in length and sometimes arising 

 at different levels, with sterigmata and metulae occasionally borne at the 

 same node; metulae 8 to 15/x by about 2.0 to 2.2/i; sterigmata in fairly 

 compact clusters of 5 to 8, measuring about 7.0 to 9.0m by 1.5 to 2.0m 

 with conidium-bearing tips narrow and rather gradually tapered; conidia 

 subglobose to elliptical, 2.5 to 3.0m by 2.0 to 2.5m, ^vith walls thin and 

 smooth or nearly so, borne in tangled chains up to 50 or 75m in length. 



Colonies on steep agar growing somewhat more rapidly, 3.5 to 4.0 cm. 

 in 2 weeks with general appearance and texture as on Czapek but somewhat 

 deeper, up to 1 mm. or more, radially furrowed and medium to heavj^ 

 sporing, in gray-green shades near mineral gray to gnaphalium green (R., 

 PI. XLVII) becoming light olive gray to olive gray in age (R., PI. LI); 

 exudate less abundant than on Czapek; odor faint, rather pleasant; re- 

 verse and agar as described above, conidial structures as above but usually 

 borne on longer conidiophores commonly 400 to 500m but up to 1 mm. in 

 length; chains of conidia tangled, Avith divaricate character masked when 

 viewed dry. 



Colonies on malt agar 3.5 to 4.0 cm. in 2 weeks (fig. 83B), with basal 

 felt thin and tearing easily, or somewhat heavier and rather brittle, plane 

 in a wide marginal area, radially furrowed at center, medium to heavily 

 sporing, gnaphalium to pea green (R., PI. XLVII); exudate lacking; odor 

 faint; reverse in orange or dull yellow buff shades; conidial structure as 

 described on Czapek. 



Species description based upon Zaleski's type received in 1928 from the 

 Centraalbureau and now maintained in our collection as NRRL 1077; 

 duplicated by a culture of similar origin received from the Centraalbureau 

 in June 1946, as P. miczynskii Zaleski. 



The species is also represented by NRRL 1024, received from Biourge 

 in 1924 as Penicillium sulfur eum Sopp and discussed by Thom in bis 

 Monograph (1930, p. 451) under this name as No. 4733.120. 



The species is approximated by a culture, NRRL 2133, received from 

 the Centraalbureau in July 1946, as Penicillium sulfureum Sopp, which 

 they obtained from Biourge in 1929. Presumably, this culture, now main- 

 tained as NRRL 2133, is derived from the same original stock as NRRL 

 1024. It currently differs from the latter in producing small aggregates of 

 heav3^-walled inflated cells that simulate the soft sclerotia which charac- 

 terize P. soppi Zaleski (see p. 279). Such structures, however, were ob- 

 served by Thom (1930) in his culture No. 4733.120, and were noted in his 



