MONOVERTICILLATA 219 



abundant in others, in pink to vinaceous shades; odor faint, indefinite; 

 reverse in red-orange shades near congo pink or terra cotta (R., PL 

 XXVIII) to Prussian red (R., PI. XXVII) with agar similarly but less 

 intensely colored; conidiophores arising mostly as short branches from 

 trailing and interwoven aerial hyphae, less than 50ju in length by 1.5 to 

 2.0m in diameter, occasionally from submerged hyphae, 50 to lOOja in 

 length, very rarely branched, smooth-walled; penicilli monoverticillate, 

 consisting of a terminal verticil of very few to 8 or 10 sterigmata bearing 

 loosely parallel to tangled chains of conidia up to lOO/x in length in heavier 

 sporing strains; sterigmata about 6 to 7m by 1.5 to 2.0m; conidia globose or 

 nearly so, about 2.0 to 2.2m, rarely 2.5m with walls delicately roughened. 

 Colonies on steep agar as above in pattern and texture but growing 

 somewhat more rapidly, 3.0 to 3.5 cm. in 2 weeks, slightly heavier sporing, 

 more frequently producing abundant vinaceous exudate and more deeply 

 colored in reverse; conidial structures as described above. 



Colonies on malt agar growing restrictedly as on Czapek but looser 

 textured and heavier sporing, light gray-green; no exudate; odor lacking 

 or indefinite; reverse in dull orange-bro^vn to deep brown shades; penicilli 

 as described above, borne on short branches from trailing or decumbent 

 hyphae with conidia in loose columns. 



Species description based upon NRRL 2064, received in August 1946, 

 from the Centraalbureau as a culture bearing this name from Biourge in 

 1929, presumably type; also, NRRL 2065 isolated in January 1946, from 

 a sample of soil from Sweden. These two cultures agree in essential colony 

 characteristics and in the pattern of their penicilli; the former, however, 

 consistently produces more restricted and less heavily sporing colonies 

 and shows penicilli generally smaller than the latter. In both strains, the 

 penicilli are commonly borne as short branches on alternate sides of trail- 

 ing or decumbent aerial hyphae in the manner characteristic of the Peni- 

 cillium fcllutanuyn sub-series. 



Strain NRRL 2066, received in February 1946, from the Centraalbu- 

 reau as a culture obtained by them as Penicillium cannino-violaceum 

 Dierckx from the National Collection of Tj^pe Cultures, London, produces 

 colonies which, in rate of growth and in general habit and color, are in- 

 distinguishable from NRRL 2064. Colony margins often show some 

 aggregation of aerial hyphae into ropes or prostrate bundles and, in this 

 regard, fit Biourge 's description and figures for P. carmino-violaceum 

 Dierckx. The conidia in this strain are about 2m in diameter, globose 

 with walls finely roughened, and so duplicate those of P. roseo-purpureum; 

 conidia in P. carmino-violaceum were described and figured by Biourge as 

 ovate to more or less elliptical. We believe that this culture should be 

 regarded as representing P. roseo-purpureum despite the funiculose colony 



