258 A MANUAL OP THE PENICILLIA 



1'. Sclerotia very hard, stony, white to light pink in color, vegeta- 

 tive mycelium white P. raistrickii Smith 275 



2'. Sclerotia fairly firm, not sclerotioid, yellow to light brown in 

 color, vegetative mycelium often developing yellow shades 

 from encrustment with yellow granules P. pulvillorum Turfitt 277 



b. Conidiophore walls finely roughened, true sclerotia lacking but small 



rounded masses of thick-walled cells evident upon all substrata 

 and particularly upon malt agar P. soppi Zaleski 279 



c. Conidiophore walls smooth or nearly so. 



1'. White to pink sclerotia reported P. rolfsii Thorn 282 



2'. Small masses of heavy-walled cells (as in P. soppi) produced in 



some strains P. miczi/iiskii Zaleski 



(see P. janthinellum series) 

 2. Conidial areas commonly showing fasciculation, with conidiophores 

 aggregated into more or less well defined bundles or tufts 



The Fasciculata (in part) 467 



a. Sclerotia abundantly produced, often characterizing the colony 



at temperatures above 20°C P. gladioli Machacek 



(see p. 471) 



b. Sclerotia reported but seldom producetl abuntlantly 



P. italicunt Wehmer 



(see p. 526) 



II. Colonies not producing perithecia, sclerotia, or masses of thick-walled cells. 



A. Colonies not showing green, gray-green or blue-green with the ripening of 



conidia. 



1. Colonies deeply floccose, becoming lilac, vinaceous or violaceous with 



the development of conidia P. lilacinum series 284 



a. Colonies developing lilacinus (Saccardo) or vinaceous (Ridgway) 



shades, with reverse similarly colored, or in some strains becoming 

 jiurple-red P. lilacinum Thom 285 



b. Colonies developing violet shades near "light lobelia violet" (Ridg- 



way) with ripening of conidia, and with reverse in bright yellow 

 shades Spicaria violacea Abbott 288 



2. Colonies not deeply floccose, comparatively thin, often strongly wrink- 



led, becoming pinkish-buff to avellaneous witli ripening of conidia. 



P. hnmuli van Beyma 291 



3. Colonies velvety or nearly so, with conidial areas in tan, cream, or 



near-white shades, never showing green 



Natural mutants of many species 



B. Colonies showing some shade of green, gray, gray-green, or blue-green 



with the ripening of conidia. 

 1. Penicilli with divaricate character well marked, sterigmata-bearing 

 branchlets (metulae) scattered on the conidiophore, or commonly 

 only partly aggregated into true verticils, 

 a. Ripe conidia typically in pale blue-green or gray-green shades and 

 colony reverse often highly colored, 

 r. Conidial chains strongly divergent and/or becoming tangled in 

 age, not tending to form columns, 

 aa. Sterigmata abruptly tapered to narrow conidium-bearing 

 tubes; colonies usually not funiculose 



P. janthinellum series 294 



