246 A MANUAL OF THE PENICILLIA 



velvety, with growing margin white, 1.0 to 1.5 mm. wide, otherwise heav- 

 ily sporing throughout, near dark glaucous gray to grayish blue-green 

 (R., PI. XLVIII); exudate limited; conidiophores comparatively long, up 

 to 200/i or more in length by 1.5 to 2.0/x, with walls smooth, commonly 

 unb ranched or with branches long and limited in number; penicilli consist- 

 ing of simple, crowded verticils of 8 to 12 parallel sterigmata measuring 

 10 to 12/i by 1.5 to 2.0^, approximately uniform in diameter throughout 

 the greater portion of their length but tapering to narrow conidiimi- 

 bearing tubes; conidia as described above. 



Colonies on malt extract agar like the preceding except looser in texture, 

 not furrowed, somewhat deeper, up to 2 mm. in central areas, sporulating 

 abundantly in sub-central to sub-marginal area; color of conidial areas as 

 on steep agar; conidiophores are even longer than on steep agar and the 

 penicilli usually show fewer sterigmata; conidia as described above. 



Species description centered upon NRRL 775. This culture was re- 

 ceived originally by Thom from the Bainier collection, and was subse- 

 quently carried in Thom's collection as No. 4640.422 and used as the basis 

 of his emended description of Citromyces cyaneus Bainier and Sartory in 

 his Monograph (1930, pp. 226-228). Thom presented reasons for regard- 

 ing the culture as type, and the strain still retains the cultural and micro- 

 scopic characteristics exhibited at that time. Strains approximating this 

 culture are occasionally encountered. 



Penidllium waksmani Zaleski, in Bui. Acad. Polonaise Sci.: Math, et Nat. 

 Ser. B, pp. 468-469; Taf. 49. 1927. Thom, The Penicillia, pp. 



230-231. 1930. 



Colonies on Czapek's solution agar growing rather restrictedly, attain- 

 ing a diameter of 1.5 to 2.0 cm. in ten days at room temperature, strongly 

 wrinlded and buckled, with central area generally raised 1 to 2 mm. (fig. 

 68B), consisting of a closely-woven basal felt of delicate hyphae, appearing 

 velvety in marginal areas after one week, margin thin and with submerged 

 mycelia usually extending 1 mm. or more beyond the aerial growth, me- 

 dium to light sporulating after one week, in pale blue-green shades near 

 court gray or celandine green (Ridgway, PI. XLVII) to deep or dark olive 

 gray (R., PI. LI) in older colonies; exudate limited in amount, in small 

 droplets, clear; odor lacking or indefinite; reverse uncolored or in pale 

 peach shades; conidiophores arising from the basal felt as ascending, 

 criss-cross rather than erect branches, from very short to 100 to 200ju 

 in length by 1.5 to 2.0/x in diameter, with apices somewhat enlarged up to 

 2.5 to 3.0m, smooth-walled or nearly so; penicilli monoverticillate, often 

 appearing singly, sometimes in irregular clusters of 2, 3, or more, borne on 

 separate branches and retaining their individual mi.noverticillate character 



