420 A MANUAL OF THE PENICILLIA 



physiologically closely related to definitely fasciculate species. Abandon- 

 ment of the Lanata section has been considered on this account. It is 

 retained, however, since we feel that the user of the Manual will, through 

 it, experience less difficulty in locating certain well-defined and long- 

 recognized species than through any other approach now available. The 

 user of this Manual should, however, guard against assuming that the 

 Lanata, except for the P. camemberti series, represents a natural grouping 

 of strains that should be expected to exhibit unique biochemical or physi- 

 ological characteristics. 



Key to the Lanata 



I. Colonies typically floccose, without evidence of fascicles or ropes of hyphae, 

 or with such structures reduced and inconspicuous if present. 



A. Colonies predominantly white, remaining so, with the development of 



ripe conidia or becoming lightly colored in gray -green shades. 



P. camemberti series 421 



1. Colonies remaining white indefinitely P. caseicolum, Bainier 422 



2. Colonies with surface becoming pale gray -green or greenish glaucous 



within 10 to 14 days P. cameynherti Thorn 426 



B. Colonies quickly developing some shade of green in conidial areas. 



P. commune series 429 



1. Vegetative mycelium uucolored and with reverse uncolored or in drab 



shades, usually heavily sporing on malt agar. 



a. Conidia globose or nearly so, less than 4.0m in diameter, finely 



roughened P- lanosum Westling 431 



b. Conidia elliptical or in age becoming subglobose, commonly up to 



4.0iU or more in diameter, smooth-walled, 

 r. Conidial areas in rather bright yellow-green shades. 



P. lanoso-viride Thom 434 

 2'. Conidial areas bluish green to gray-green. 



aa. Conidial areas with blue element pronounced, near bluish 



glaucous, deeply floccose P. lanoso-coeruleum Thom 436 



3'. Conidial areas with green to gray -green shades predominating; 

 at first court gray to gnaphalium green, becoming olive in age. 

 aa. Colonies with unusually strong actinomyces-like odor. 



P. biforme Thom 437 

 bb. Colonies with odor less pronounced. 



1". Colonies forming a felt 300 to lOOO/x deep. 



P. commune Thom 439 

 2". Colonies deeply floccose, 1 to 2 mm. deep. 



P. lanoso-griseum Thom 441 



2. Vegetative mycelium yellow to orange, at least adjacent to the sub- 



stratum; reverse orange to bay; non-sporulating or very lightly 

 sporulating on malt agar. 



a. Colonies deep, 2.0 to 3.0 mm., loosely floccose, lightly sporulat- 



ing upon Czapek and steep agars. .P. aurantio-candidum Dierckx 442 



b. Colonies thinner, definitely fasciculate, usually heavily sporing on 



Czapek and steep agars P. auranlio-virens Biourge 503 



(in P. cyclopium series, p. 490) 



