464 A JVLiNUAL OF THE PENICILLL\ 



presence of asymmetric penicilli and non-lanceolate sterigmata, together 

 with the production of strong earthy odors on different substrata, suggests 

 other relationships. 



The very rough walls of conidiophores, metulae, and even sterigmata 

 found in XRRL 1070 are characteristic of the Penicillium -pallidum series 

 in the Funiculosa. Conidia are in dirty white to dull light gray shades, 

 rather than white to cream colored as in most other members of this series. 

 Furthermore, this species grows thinly upon all substrata, particularly 

 Czapek, and the funiculose character usually associated with members of 

 the P. 'pallidum series, to which it is assigned, is somewhat limited but 

 clearly evident when the colony surface is viewed under low magnifications. 

 We believe the species is more closely allied to other members of the P. 

 pallidum series than to any other recognized forms. 



Penicillium lavendulum Raper and Fennell, in Mycologia. 40: 530-533, 



fig. 8. 1948. 



Colonies on Czapek's solution agar (Col. PI. VII) spreading broadly, 

 attaining a diameter of 5.0 to 6.0 cm. in 12 to 14 days, plane or nearly so, 

 azonate, comparatively thin with vegetative mycelium largely submerged 

 and with surface growth consisting of a loose weft of flocculent to cottony 

 hyphae, showing some ropiness mostly in marginal to submarginal areas, 

 sporulating most abundantly in central areas (fig. 120D), approximating 

 dark grayish lavender to Ramier blue (Ridgway, PI. XLIII), thinning 

 through lighter shades to uncolored at the colony margin; exudate limited, 

 in small drops, colorless; odor slight; reverse uncolored to light purple; 

 penicilli variable in size, with conidial chains up to lOO/z in length, loosely 

 parallel, tangled or matted; conidiophores sometimes arising from the 

 substratum, but borne primarily as branches from aerial hyphae, commonly 

 100 to 150/i in length by 3.0 to 3.5yu in diameter, sometimes shorter, sep- 

 tate, with walls closely echinulate; penicilli asymmetrical, irregularly 

 once- or twice-branched (fig. 119B), with metulae commonly arising at 

 different levels within the penicillus; branches mostly 2.5 to 3.0/i in di- 

 ameter, varying greatly in length up to 15 to 20/^; metulae mostly 8 to 

 10/x by 2.5 to S.Ofx, often roughened (fig. 119B); sterigmata in compact 

 clusters, closely parallel, 7 to 9ju by 2.0 to 2.2^, with apices slightly nar- 

 rowed but lacking well-defined conidium-bearing tubes, commonly rough- 

 walled; conidia strongty elliptical (fig. 119B), from 3.0 to 4.5/i by 2.0 to 

 3.0/u, with walls smooth and comparatively heavy, tending to adhere into 

 chains in fluid mounts. 



Colonies on steep agar growing as on Czapek but somewhat deeper and 

 generally heavier sporing (fig. 120E), predominantly dark grayish lavender 

 but often appearing somewhat mottled from irregular spore production in 



