BIVERTICILLATA-SYMMETRICA 621 



Penicillium minio-luteum. Dierckx (Soc. Scient. Brux. 25: 87. 1901) was reported 

 by Biourgc (Lii Cellule 33: fasc. 1, pp. 237-239; Col. PI. VII and PI. XII, fig. 67. 1923) 

 in terms which led Thorn (1930) to regard the species as doubtfully separable from 

 his P. funiadosum. Biourge's culture confirmed this placement. 



PenicilUum vcrruculosum Peyronel, in I germi atmosferici dei funghi con 

 micelio, p. 22, Padova. 1913. Thorn, The Penicillia, p. 474. 1930. 



Colonies on Czapek's solution agar growing fairly rapidly, attaining a 

 diameter of 5.0 to 5.5 cm. in 12 to 14 days at room temperature, usually 

 plane or nearly so but often showing a small, slightly raised central umbo, 

 azonate, consisting of a thin and comparatively loose mycelial felt, tearing 

 easily, surface appearing fibrous to more or less floccose-funiculose, pro- 

 ducing abundant conidial structures primarily from the basal felt inter- 

 mixed with branching aerial yellow-encrusted hyphae, mostly in bright 

 yellow-green shades near deep sea foam green in marginal areas through 

 chrysolite greens, becoming jade green in age (Ridgway, PI. XXXI); 

 exudate lacking; odor lacking or indefinite; reverse uncolored or showing 

 pale drab to greenish shades which become dull brown in age; conidiophores 

 mostly 75 to 100m long by 2.2 to 2.8 or 3.0m in diameter, smooth-walled; 

 penicilli typically biverticillate and symmetrical, comparatively short and 

 broad, consisting of a terminal verticil of 5 to 9 metulae, about 7 to 8m by 

 3.0 to 3.5m; sterigmata in clusters of 5 to 7, measuring 8 to 10m by 2.2 to 2.8m 

 Avith sharply tapered conidium bearing tubes; conidia globose or nearly so, 

 2.8 to 3.5m, with walls conspicuously echinulate, becoming dark green in 

 age, borne in tangled chains up to 50m or more in length. 



Colonies on steep agar growing somewhat more rapidly, 6.5 to 7.0 cm. 

 in 12 to 14 days at room temperature; radially furrowed, with mycelial felt 

 as described on Czapek, producing abundant conidial structures from the 

 loose basal felt, intermixed with yellow-encrusted hyphae, sometimes with 

 the whole colony more or less overgrown by white sterile mycelium, grow- 

 ing margin wide, white to light yellow-green near sea foam to deep sea foam 

 green (R., PI. XXXI), becoming Lincoln green to dusky ohve-green (R., 

 PI. XLI) with the development of mature conidial structures; exudate 

 limited, clear, in small droplets throughout the entire colony; odor faint, 

 slightly moldy; reverse uncolored or in slight flesh tints, developing drab 

 to brownish olive shades in age; details of the penicilli as described on 

 Czapek. 



Colonies on malt agar 6.5 to 7.0 cm. in 12 to 14 days, plane or nearly so 

 (fig. 160C), colony texture and color as described on Czapek except more 

 definitely funiculose, slightly deeper and becoming somewhat darker green 

 near yew green (R., PI. XXI) from a more abundant production of conidial 

 structures; exudate limited to almost lacking; odor lacking; reverse almost 

 uncolored with only a suggestion of rose or green shades; conidiophores 



