242 A MANUAL OF THE PENICILLIA 



PenicilUum capsulatum Raper and Fennell, in Mycologia 40: 528-530, 



fig. 7. 1948. 



Colonies on Czapek's solution agar growing restrictedly, attaining a 

 diameter of 1.5 to 2.0 cm. in 10 to 12 days at room temperature, consist- 

 ing of a comparatively thin, close-textured mycelial felt, tough, tearing 

 irregularly, with surface appearing velvety or very slightly floccose, deeply 

 furrowed (fig. 67A and D), commonly raised or depressed in central area, 

 azonate in most strains, with growing margin narrow, about 1 mm. wide, 

 white, medium sporing throughout, in gray-green shades, at first approx- 

 imately court gray or gnaphalium green (Ridgway, PI. XLVII) becoming 

 darker in age near sage green (R., PI. XLVII), exudate lacking; odor lack- 

 ing or indefinite; reverse uncolored or slightly greenish at first but later 

 showing orange to pinkish shades; conidiophores ascending, arising pri- 

 marily from creeping or interlacing hyphae (fig. 67E), from very short up 

 to 100m or more in length by 2.0 to 2.5m in diameter, walls smooth, branch- 

 ing irregularly, occasionally over their entire length, but more abundantly 

 in terminal areas; penicilli monoverticillate, borne on branches of varying 

 length and occasionally more or less clustered but consistently retaining 

 their individual character (fig. 67F); sterigmata borne irregularly but 

 typically in simple clusters, ranging from 4 to 5 up to 8 to 10 in the verticil, 

 usually crowded, parallel, sometimes divergent, mostly 8 to 10m by 2.0 

 to 2.2m but not infrequently larger or smaller; conidia strongly elliptical, 

 commonly capsule-shaped, mostly 3.0 to 4.0m by 2.0 to 2.5m, but frequently 

 larger, with walls smooth. 



Colonies on steep agar growing more rapidly, 2.5 to 3.0 cm. in 10 to 

 12 days, texture as described above but more strongly and deeply furrowed 

 (fig. 67B), heavier sporing throughout, at first near pea green becoming 

 sage green in colony center (R., PI. XLVII); exudate limited, pale yellow; 

 odor sourish; reverse uncolored or in yellow shades; conidiophores and 

 penicilli as described above; conidia more consistently capsule-shaped. 



Colonies on malt agar about 2.5 to 3.0 cm. in 10 to 12 days, compara- 

 tively thin with center commonly raised, velvety, heavily sporing through- 

 out (fig. 67C), pea green to sage green, reverse in dull yellow to drab 

 shades; conidiophores longer up to 200 to 300m and loosely branched, 

 commonly arising from the substratum, with walls smooth but appearing 

 granular within ; penicilli more regular in pattern than on Czapek or steep 

 agar, usually consisting of a closely crowded cluster of 6 to 12 or more 

 parallel sterigmata, 7 to 8m by 1.5 to 2.0m, bearing conidia in long parallel 

 chains forming compact coliunns, about 10m in diameter and up to 150m 

 or more in length; conidia very strongly elliptical to narrowly cylindrical, 

 mostly 3.0 to 4.0m by 1.5 to 2.0m, occasionally up to 6.0 or 7.0m by 2.0 to 



