ASYMMETRICA-FASCICULATA 551 



Penicillium silvaticum (Wehmer) Gaiimann, in Vergl. Morph. 



Pilze, p. 177, fig. 113. 1926. 

 Coremium vulgare Corda, in Prachtflora, 1839. Part but not 



all of figs, in PL XXV may be this species. 



Colonies on Czapek's solution agar attaining a diameter of 2.5 to 3.0 cm. 

 in 12 to 14 days at room temperature with vegetative mycelium white to 

 light grayish, largely submerged in some strains, partially aerial and floc- 

 cose in others with this floccose hyphae commonly bearing separate peni- 

 cilli loosely scattered; species particularly characterized by the production 

 of large and conspicuous coremia, commonly in concentric zones, with 

 coremium stalks compact, fibrous, from white to flesh color or rose, simple, 

 flattened or variously branched, commonly measuring 2 to 3 mm. in height 

 but occasionally up to 1 cm. or more, and terminated by a clavate, spatu- 

 late, or divided mass of conidial structures, in some cases composed of well- 

 differentiated asymmetric penicilli on tangled and interwoven conidiophores, 

 but more commonly with individual fruiting structures less well-defined 

 and sterigmatic elements interlaced to produce a hymenium-like spore- 

 bearing surface, with the entire terminal area covered by crowded 

 conidial chains which separate into broad irregular columns up to 500m or 

 more in length in age, in color approximating Russian green (Ridgway, 

 PI. XLII) to sage green (R., PI. XLVII); odor very strong, penetrating, 

 pungent, to some individuals suggesting Irish potatoes in storage, to others 

 more or less aromatic ; exudate abundantly produced in some strains, col- 

 lecting into large, crystal clear drops, generally adherent to the stalks; 

 reverse brown in age, darker directly beneath the coremia; penicilli very 

 irregular (fig. 140C), often large or individually indistinguishable with 

 elements closely crowded and interlaced to form a continuous spore bearing 

 surface; conidiophores poorly defined, with walls smooth, about 3.5 to 

 4.0/x in diameter; branches, when distinguishable, range from 10 to 25m or 

 30m by 3.0 to 4.0m; metulae occur singly or in groups of 2 to 4, ranging from 

 incurved to strongly divergent; sterigmata few to the metula, mostly 9 to 

 12m by 2.0 to 2.8m; conidia elliptical, 4.0 to 4.5m by 3.0 to 3.5m with walls 

 smooth (fig. 140D), commonly adherent in long chains in fluid mounts. 



Colonies on steep agar essentially as described on Czapek but larger, 

 5.0 to 6.0 cm. in diameter in 2 weeks (fig. 140A) and with coremia averaging 

 shghtly larger, with exudate production, odor, colony reverse, and conidial 

 structures duplicating the above. 



Colonies on malt essentially as on Czapek but with coremia less numerous 

 and \yith stalks generally longer (fig. 141) and more definitely red in color, 

 with other characters as already described. 



Species description based upon the following strains: NRRL 1002 from 



