THE ASPERGILLUS TAMARII GROUP 253 



in one series in smaller and crowded heads, up to 15 to 20/x by 4.0 to 5.0m; 

 sterigmata often in two series in larger heads with primaries about 15 to 

 18m by 4 to 5m, secondaries 12 to 14m by 4 to 5m. Conidia subglobose, 

 varying from 5 by 7m to 8 by 9m, conspicuously roughened with prominent 

 tubercles of color (fig 68 C). 



The species is known only in the type culture from the Bainier collection, 

 NRRL Xo. 425 (Thorn Xo. 4040.478), and as a second strain, XRRL Xo. 

 420, isolated in the Soil Microbiology Laboratory, Bureau of Plant Industry, 

 Washington, D. C, about 1939. 



Aspergillus terricola Marchal, in Rev. Mycologique 15, Xo. 59: 101-103. 



1893. 



Colonies umbrinus; mycelial hyphae 3 to 5m in diameter, without anasto- 

 moses; conidiophores hyaline, continuous or septate in age, 000 to 1,000m 

 by 7 to 10m (whole depth of colony growth); vesicles subglobose, hyaline, 

 39 to 50m, radiately covered with sterigmata; sterigmata in one series, 12 

 to 15m by 4 to 7m; conidia umber (Sacc), ovate or elliptical then globose, 

 rough, with colorless connectives. 



Description, from Marchal, of a culture isolated from soil in Belgium; 

 not reported elsewhere, see variety below. 



Aspergillus terricola var. americana Marchal, cultural description by Thorn 

 and Church, in Am. Jour. Bot. 8: 125. 1921. 



Colonies on Czapek's solution agar growing rapidly at room temperature, 

 often somewhat floccose in central colony areas (fig. 68 D), ranging from 

 shades near yellow ochre (Ridgway, PI. XV) when young, to Dresden brown 

 or mummy brown in age, near Saccardo's umbrinus (PI. VII A); aerial 

 growth largely consisting of crowded conidiophores; reverse uncolored. 

 Conidial heads radiate, hemispherical to subglobose, loose in texture, 

 consisting of comparatively few divergent chains of conidia, up to 200m in 

 diameter. Conidiophores 300 to 000m in length by to 8m in diameter, 

 with walls pitted. Vesicles globose to subglobose (fig. 08 E), up to 25m 

 in diameter, fertile over the upper two-thirds or three-fourths. Sterigmata 

 in one series, 7 to 10m by 2 to 4m- Conidia tuberculate (fig. 08 F) from the 

 presence of color bars variously distributed between the outer and inner 

 wall, ovate to nearly globose, from 3 by 5m up to 5 by 7m, usually about 

 5.5m, occasionally 5 to 8m in diameter. 



Type culture XRRL Xo. 424 (Thorn Xo. 4838) isolated by F. M. Scales 

 from redland soil in Georgia and discussed by Scales, in Jour. Biol. Chem. 

 19: 459-472, 1914, under the name A. terricola Marchal. Scales' culture 

 was submitted to Marchal, who designated the form as A. terricola var. 

 americana Marchal, distinguished as follows: "The dimensions of the 



