BIVERTICILLATA-SYMMETRICA 661 



almost lanose, consisting of a thin basal felt with conidiophores arising 

 from the felt or directly from the substratimi, medium to heavy sporing, in 

 yellow-green shades near tea green through vetiver to Andover green 

 (Ridgway, PI. XL VII) ; exudate lacking or limited ; odor sometimes lacking 

 or indefinite but usually strong, variable, often suggesting black walnuts, 

 occasionally apples, or in some strains spicy; reverse in dark yellow-green 

 (sometimes almost fluorescent) shades, becoming brown at margins, or 

 occasionally under the entire colony, surrounding agar highly colored in 

 lighter tints of the same shades; conidiophores 200 to SOOju or more in 

 length by 3.5 to -I.om in diameter, appearing extremely rough and heavily 

 encrusted when viewed dry under the low powers of a compound micro- 

 scope, but in liquid mounts often appearing smooth, or again showing a 

 coarse roughening immediatelj' below the penicillus; penicilli comparatively 

 short (fig. 166E and F), regularly consisting of a terminal verticil of metulae 

 bearing clusters of sterigmata; metulae usually in verticils of 4 to 6 but 

 sometimes up to 8 or 10, commonly measuring 10 to 15m by 4.0 to 4.5/x 

 somewhat enlarged at the tips; sterigmata 9 to 12ju by 3.0 to 4.0/i, in clusters 

 of 8 to 12, tapered abruptly to narrow beak-like conidial tubes; conidia 

 elliptical, typically smooth or nearly so, 3.5 to 4.0/x by 2.2 to S.Ojj., borne in 

 tangled or loosely parallel chains up to 100^ or more in length. 



Colonies on steep agar growing more rapidh^ 3.5 to 5.0 cm. in 2 weeks 

 at room temperature, deeper than on Czapek, with conidiophores up to 

 500 or 600/x long; exudate lacking or limited in amount; odor not as distinc- 

 tive as on Czapek, with only an occasional strain suggesting black walnuts; 

 reverse and details of penicilli as described above. 



Colonies on malt extract agar spreading, 6 to 7 cm. in 2 weeks at room 

 temperature, plane, very deeply velvety to lanose (fig. 166B), medium 

 to heavily sporing with j'^ellow encrusted mycelium fairly conspicuous 

 throughout; odor not pronounced, usually somewhat unpleasant, occasion- 

 ally with slight suggestion of walnuts; reverse in orange or greenish brown 

 shades; conidiophores up to 1000^ or more in length; other details as de- 

 scribed on Czapek 's agar. 



Species description centered upon NRRL 1040 from the Thom Collection 

 as No. 4640.447, received originally from Bainier as his tjrpe; duplicated 

 essentially by NRRL 1041, from the Thom Collection as No. 12719.7 iso- 

 lated from wood by C. J. Humphrey at Madison, Wisconsin and cited in 

 Thom's Monograph (pp. 469-470) as possibly representing Penicillium 

 lemoni Sopp; NRRL 1837, from C. F. Andrus, Charleston, S. C, in 1942 

 as an isolate from marsh forest soil; and a strain received from the Centraal- 

 bureau as P. herquei and now maintained as NRRL 2113. This latter cul- 

 ture is listed as having been received from Paris in 1922 and may represent 

 Bainier 's type culture, thus duplicating NRRL 1040 in origin as well as in 



