142 A MANUAL OF THE ASPERGILLI 



Aspergillus penicilloides Spegazzini, in Rev. Agrar. Veter. 

 La Plata, p. 246. 1896. 



Spegazzini 's description was emended by Thorn and Church (The As- 

 pergilli, p. 126, 1926) then broadened by Smith (Jour. Text. Inst. 22, pp. 

 114-115, 1931) as follows: 



"Colonies growing fairly slowly on wort agar, rich dark green with paler 

 edge, turning darker and duller, and finally becoming dirty greenish-grey 

 overgrown with sterile hyphae; reverse brown, greenish-brown, and dark 

 green in patches; surface much wrinkled and folded; heads globose when 

 young, 40 to 70 /x in diameter, becoming columnar, somewhat ragged, and 

 up to 200^ long; conidiophores arising either from substratum or from aerial 

 hyphae, smooth, thin-walled, 75 to 150 m long by 6 to 10 n in diameter; 

 vesicles rather sharply marked off from conidiophores, pear-shaped to sub- 

 globose, 15 to 23/xin diameter, fertile over the upper half or two-thirds; 

 sterigmata in one series, crowded, 8 to 10 n by 2.5 to 3.5 n; conidia ovate, 

 barrel shaped or nearly spherical, usually showing connective, rough, 3.5 

 to 5m by 3.2 to 4/x, with very dark colored walls." 



Thorn and Church had strain No. 4197.3 isolated from cane products in 

 Louisiana by Owen and agreed to by Spegazzini; NRRL No. 151 (Thorn 

 No. 7), also from cane products, fits this description satisfactorily; as did 

 also Biourge's strain labeled A. pertardus. Smith reports various strains 

 from mildewed textiles. 



It would thus appear that the vesicular area in the series varies from the 

 curved apex of a clavate conidiophore as in A. gracilis, to a fairly well- 

 defined hemispherical vesicle as in A. restrictus, and finally to an almost 

 globose body as in A . penicilloides. All have so much in common with each 

 other and with the A. glaucus group that their relationship as "degraded" 

 mutants appears probable. 



Aspergillus itaconicus Kinoshita, in Botan. Mag. Tokyo 45: 60-61. 1931. 



Probable synonym: A. varians Wehmer, in Bot. Centralb. 80: 460-1. 



1899; also in Wehmer Monogr. 77-79, Taf. I, fig. 

 1. 1899-1901. 



Diagnosis from Kinoshita's organism obtained from Dr. Westerdijk. 

 Colonies on Czapek's solution agar forming dense felts 1 to 2 mm. deep, 

 white or yellowish, ridged and irregular, with scattered long-stalked green 

 heads upon dry areas and on the glass ; fruiting more abundantly upon malt 

 agar, and particularly upon Czapek's solution agar containing 20 percent 

 sugar; reverse of colony and agar yellow to orange-reddish upon some 

 media; heads large, light green, globose to radiate, breaking up easily under 

 the coverglass; conidiophores smooth, colorless, 8 to 16 ju or larger in diam- 

 eter and up to several millimeters in length under some conditions, with 



