MONOVERTICILLATA 1 77 



Penicillium oledzkii Zaleski (Bui. Acad. Polonaise Sci.: Math, et Nat. Ser. B, pp. 

 499-501; Taf. 59. 1927) represents another described species properly assignable to 

 P.frequentans Westling. The author's description and figures, together with Thorn's 

 observations on the type culture led the latter to this conclusion in 1930. Re-exami- 

 nation of the type strain, XRRL 770, as maintained in this laboratory, and as sent 

 to us by the Centraalbureau in June 1946, fully substantiates Thom's earlier place- 

 ment. The two cultures (both type) are almost indistinguishable from NRRL 1915, 

 used as one of the centers for our diagnosis of P. freouentans Westling. 



Penicillium pfefferianum (Wehmer) Pollacci, in Atti. 1st. Bot. Univ., Pavia, Ser. 

 II, 16: 121-136, PI. XVI. 1916. Pollacci appropriates the name given by Wehmer 

 for an organism reported as found upon rotting fruit and sausages and in solutions 

 of sugar, citric acid, and oxalic acid. Among characteristics mentioned are conidia 

 globose, 2.5 to 3.0m i" diameter, in solid columns, green to gray in color. There is no 

 way to identify this mold accurately. It probably belongs with P. frequentans rather 

 than P. spinulosum. 



Penicillium sinicum Shih (Sapporo Nat. Hist. Soc. Trans. 14: 286-287, PI. 12, fig. 3. 

 1936) from the author's description appears to have been a member of the P.frequen- 

 tans series in which the conidia were smooth, globose, 2.5 to 3.6^ in diameter, in 

 columns up to 160m long; conidiophores arose mostly from submerged hyphae and 

 varied from short, 40^, to 260m in length. 



Penicillium purpurrescens (Sopp) n. comb. 



Synonym: Citromyces purpurrescens Sopp, in Monogr. pp. 117-119. 

 Taf. XIV, fig. 102; Taf. XXII, fig. 4. 1912. Thom, 

 The Penicillia, p. 178. 1930. 



Colonies on Czapek's solution agar attaining a diameter of 3.0 to 3.5 

 cm. in 12 to 14 days at room temperature, conspicuously zonate in some 

 strains, almost azonate in others, radiately ^vrinkled (fig. 50A), sometimes 

 deeply buckled at center, consisting of a rather thick, closely -woven myce- 

 lial felt of coarse hyphae, becoming velvety or nearly so at the margin, 

 in some strains heavily sporing throughout, in others in marginal areas 

 only, conidial areas in dark blue-green shades near Russian to dark Rus- 

 sian green (Ridgway, PI. XLII) ; exudate limited to fairly abundant, light 

 amber to reddish; odor indefinite; reverse in reddish purple (R., PL XLIV) 

 or brown (R., PI. XXXIX) shades, brownish drab or dark drab (R., PI. 

 XLV) ; conidiophores generally arising in a close stand directly from the 

 substratum (fig. oOC), mostly 100 to loO/x long by 3.0 to 3.5m in diameter, 

 comparatively thin walled, smooth or finely roughened, enlarging some- 

 what at the apices to 4.0 to 4.5^; penicilli strictly monoverticillate as a 

 rule, occasionally branched, bearing chains of conidia in loose columns up 

 to 150 to 200m long; sterigmata mostly in groups of 8 to 12, crowded in 

 the verticil, often arising low on the sides of the vesicular area, 7 to 10m 

 by 2.5 to 3.5m (fig- 50D); conidia at first elliptical, then subglobose to 

 globose, mostly 3.5 to 4.5m, some larger up to 5.5m, conspicuously roughened 



