68 



CULTURAL STUDIES OF SPECIES OF PENICILLIUM. 



per cent, good growth, strongly alkaline. Glycerin 3 per cent, weak growth. Potato 

 starch, characteristic colony. 



Milk, curdling (0.25 per cent calcium chlorid added) in 8 days; digestion medium 

 rapid; color in milk, none or ? 



At 37° C, no growth, grew when cooled; check at 20° C, good typical. 



PENICILLIUM STOLONIFERUM n. sp. 



Latin diagnosis. — Coloniis in gelatina vel agaro Solani tuberosi cultis, viridibus vel 

 flavo-viridibus, demum griseo-viridibus vel griseis in agaro sine saccharo, cum sac- 



W,«i: I://////..-* ,'A J 





Fig. 26. — Penicillium stoloniferum: a, b, c. e,f, the types of branching at the tips of the ''stolons" by which 

 this species spreads in substrata (6, c, e,J, x 900); d, conidial fructification (X 900); h, j, k, I, sketches 

 oi conidial fructifications of various ages, h and j being characteristic shapes (X 140); g, formation of 

 conidia (X 900), i, ripe conidia showing minute granulation (X 1,600); m, n, germination of conidia 

 (X 900); o, rough diagram of habit. 



charo viridibus, floccosis, in culturis juvenalibus stolonibus aereis citius quam hyphis 

 submersis crescentibus, re verso incolorato vel in parte flavo; conidiophoris brevibus 

 ex hyphis adscendentibus ramosis, usque 100/( longis, aut singulatim orientibus (sine 

 ramis) plus minus 300/i longis; fructibus conidicis 40-80/* raro usque 170/z longis, ex 

 ramis brevibus compactis, et basidiis verticillatis, in baside confertissimis, catenas 

 conidiorum late divergentes gerentibus compositis, interdum ramus infimus tarn 

 divergens ut fructus duplex videatur; basidiis 10X 3/z; conidiis ellipticis vel paene 

 globosis, 2.8-3.4/* diam., pallido flavo-viridibus laevibusque; coloniis gelatinam cito 

 liquefacientibus, alkalinis lacmo. 



