THE ASPERGILLUS OCHRACEUS GROUP 279 



mycelium or vaguely in zones, giving the characteristic appearance to the 

 colony, hence the name. 



The type culture NRRL Xo. 415 (Thorn No. 5351 received from Huber) 

 was isolated from rotting apples in Oregon and proved capable of causing 

 decay in apples under controlled conditions in which other strains failed to 

 produce rot. It has not been discussed by others. Blochwitz (Ann. 

 Mycol. 32(1/2) : 88. 1934) considered A. sclerotiorum to be a synonym for 

 A. clegans Gasperini, but this is not consistent with the description. 



Aspergillus melleus Yukawa, in Jour. Coll. Agr. Imp. Univ. 

 Tokyo 1, No. 3, p. 366, Taf. 16. 1911. 



Colonies on Czapek's solution agar rapidly growing and spreading, form- 

 ing an aerial felt of sterile hyphae and conidiophores, and producing 

 sclerotia with walls white to yellowish-brown, commonly a shade of yellow- 

 orange near "melleus" of Saccardo's Chromotaxia (Approximately Ridgway 

 PI. XXX, 19", honey yellow; or warm buff, PI. XV, 17'd); reverse reddish 

 to brown shades. Conidial heads ranging from small to large and globose, 

 commonly splitting into dense columnar masses, sometimes 250 to 300m 

 in long axis. Conidiophores with walls yellow, pitted, up to 500 or even 

 1000/x long, 15 to 20 or even 25m in diameter. Vesicles up to 40 to 50m in 

 diameter, globose in large heads, more or less pyriform in small heads, 

 fragile and readily crushed in mounting. Sterigmata in two series, primary 

 10 to 20/x by 2.5 to 4/x, secondary commonly 3 to 10m by 2 to 3/x, with oc- 

 casional larger sterigmata in either series. Conidia in long chains, almost 

 colorless when mounted, very thin-walled, smooth, slightly elliptical, about 

 3m or a little more in long axis. Sclerotia ranging from 400 to 700m in 

 diameter, in yellow-brown shades. 



Hanzawa furnished Thorn's culture No. 4291.6 (NRRL No. 416) as the 

 type strain used by Yukawa. Other strains, including cultures from For- 

 mosa, South Africa, and the United States, indicate that the cultural aspect 

 of Yukawa's species is carried by organisms widely distributed. Some re- 

 lated strain may have been described by Tiraboschi as A. ochraceus var. 

 microspora (in Ann. di Botanica VII. 14. 1908) from corn bread in Italy. 

 This name is used also by Nakazawa (Jour. Agr. Chem. Soc. Japan 10: 

 English summary p. 185. 1934). 



Aspergillus ochraceus Wilhelm, in Inaug. Diss. Strassburg, p. 66. 1877. 

 Wilhelm's exsiccati exist as Rabh. Fl. Europaei no. 2361. 



Colonies upon Czapek's solution agar spreading fairly broadly, usually 

 plane, zonate in some strains, characterized by a tough submerged felt which 

 may be colorless, yellow, orange, or purplish and, arising from this, more or 

 less crowded conidial structures which give to the colony its characteristic 



