54 CULTUKAL STUDIES OP SPECIES OF PENICILLIUM. 



The name P. candidum was used by Link for a mold growing upon 

 decaying leaves, bulbs, and fungi, which was said to be common, 

 and Morini 16 later describes an ascigerous form of this fungus. The 

 spores are of different size (2-3/0. There appears to be no justifica- 

 tion for adopting this name for the fungus used by Roger in cheese 

 making. 



CULTURAL DATA. 



Different from P. camemberti only as follows: 

 Color of conidia persistently white. 



Cohn's solution, failed to germinate. Same spores transferred to gelatin after 4 

 months grew normally. 

 Camemhert cheese, does not produce the same texture as the preceding species. 



PENICILLIUM BLFORME n. sp. 



Latin diagnosis.® — Coloniis in gelatina cultis, albis, lente glaucescentibus, densius 

 floccosis, margine sterili lata, aut, in agaro solani tuberosi cultis, albis glaucescentibus, 

 mox avellaneis vel fere olivaceis, parte aeria ex conidiophoris brevissimis et creberrimis 

 fructibus conidicisque composita; conidiophoris (sine ramis) 60-150/x in agaro, vel 

 longioribus ramosis ex hyphis floccosis in gelatina cultis; fructibus conidicis 100-200/t 

 longis, plerumque 1-2 ramosis alternates, ramis convergentibus vel divergentibus, 

 ramulis verticillatis basidiaapice verticillatagerentibus; basidiis 8-10 usque 13X3/*, 

 conidiis primum ellipticis vel cylindricis demum globosis, 3.2-3.5X4-4.3, vel 4/z 

 diam., in catenis manentibus submersis; coloniis copiosis in saccharo lactis, gela- 

 tinam in parte lente liquefacientibus, alkalinis lacmo, odore mucidis. 



Habitat, in caseo, ex Gallia. 



Cultivated in gelatin, white, slowly gray-green, densely floccose, with broad vegeta- 

 tive margin, spreading widely over the substratum; in potato agar white, then gray- 

 green, rapidly becoming yellowish-brown, drab, or almost olive, restricted in growth, 

 aerial portion consisting of very short densely crowded conidiophores and conidial 

 fructifications; conidiophores 60-150/* on agar or slightly longer when arising as 

 branches from the floccose aerial mycelium growing upon gelatin; conidial fructifi- 

 cations mostly once or twice alternately branched, branches convergent or divergent, 

 each bearing a verticil of branchlets crowned by verticils of conidiiferous cells with 

 chains of conidia, the whole 60-240/*, usually 100-200/*, in length; conidiiferous cells 

 8-10 or even 13 by 3/*; conidia elliptical or cylindrical, then globose, 3.2-3.5 by 4-4.3/* 

 or 4/z in diameter, adhering in chains in fluid mounts; grows luxuriantly in fluid offer- 

 ing milk-sugar as source of carbon, partially and slowly liquefies gelatin, with alkaline 

 reaction to litmus; odor, very strong, "moldy," characteristic. 



This species was obtained from cheese sent from France by Georges 

 Roger. It was afterwards obtained from other French cheeses, but 

 does not seem to have any economic importance. It is closely 

 related by cultural characters as well as morphology to P. camem- 

 berti, with which it shares the ability to grow normally in fluid off ering 

 lactose as the source of carbon, but differs in its short conidiophores, 

 diverse habit upon potato agar and gelatin, and its strong charac- 



a The author is indebted to Prof. H. R. Monteith, of the Connecticut Agricultural 

 College, for much assistance in preparing the Latin diagnoses. 



