446 A MANUAL OF THE PENICILLIA 



ciculata sections; conidiophore walls more or less roughened, but metulae 

 and sterigmata smooth. P. terrestre series 446 



A. Colonies with reverse uncolored or in pale yellow to drab shades. 



1. Conidia in bright yellow-green shades P. psittacinum Thorn 448 



2. Conidia in dull gray-green shades, with conidiophores usually con- 



spicuously roughened P. terrestre Jensen 450 



3. Conidia in blue-green shades, with conidiophores smooth or nearly so. 



P. solilum Westling 453 



B. Colonies deeply colored in reverse, in reddish to dark brown shades. 



P. resticidosiim Birk., Raist., and Smith 455 

 II. Conidial areas variously colored, not in green shades; penicilH often com- 

 paratively narrow with cellular elements laterally compressed; walls of 

 conidiophores, metulae (and often the sterigmata) are closely and con- 

 spicuously roughened P- pallidum series 458 



A. Conidia white to cream colored. 



1. Conidial chains divergent, becoming tangled in age. 



P. pallidum Smith 431 



2. Conidial chains in well-defined columns P. putterillii Thom 461 



B. Conidia in light to dull gray shades P. namyslowskii Zaleski 462 



C. Conidia in light violet, lavender, or vinaceous shades. 



P. lavendnlum Raper and Fennell 464 



Penicillium terrestre Series 

 Outstanding Characters 



Colonies spreading, lanose or floccose, with surface growth characterized 

 by abundant and conspicuous ropes or funicles of hyphae when viewed 

 under low magnification, in age sometimes developing true fascicles, and 

 in thin colony areas often appearing velvety. 



Conidiophores arising either from ropes of aerial hyphae or from the sub- 

 stratum, often comparatively coarse up to 3.5 to 4.0m in diameter, with 

 walls usually but not consistently roughened. 



Penicilli asymmetric, comparatively large, commonly branched, approx- 

 imating those of the Fasciculata and the Lanata in size and dimensions. 



Metulae, sterigmata, and conidia comparatively large; the latter commonly 

 up to 4.0 to 5.0/i in diameter and often showing wide variation in size in 

 the same mount. 



Vegetative mycelium fairly coarse, commonly measuring 4.0 to o.O/x in 

 diameter. 



Series Key 

 (See General Key to the Funiculosa) 



The Penicillium terrestre series as considered here consists primarily of 

 forms isolated with considerable frequency from soil. They are charac- 

 terized by rapidly growing, loose-textured to floccose or lanose colonies, 

 that typically show the production of abundant ropes of aerial vegetative 



