. Cultural studies of species of Penicillium. Penicillium -- Cultures and culture media; Fungi -- Cultures and culture media. 80 CULTURAL STUDIES OF SPECIES OF PENICILLIUM. Penicillium No. 31. Colonies upon gelatin and potato or bean agar from white to gray to gray-green mostly white, with few areas of green conidia sprinkled with pink sclerotia, sparsely floccose, broadly spreading. Conidiophores branching from aerial hyphae, very short to 380/* in length, commonly 150-240/*, conidial fructification with a single verticil or once branched with branch, conidiiferous cells and chains of conidia
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. Cultural studies of species of Penicillium. Penicillium -- Cultures and culture media; Fungi -- Cultures and culture media. 80 CULTURAL STUDIES OF SPECIES OF PENICILLIUM. Penicillium No. 31. Colonies upon gelatin and potato or bean agar from white to gray to gray-green mostly white, with few areas of green conidia sprinkled with pink sclerotia, sparsely floccose, broadly spreading. Conidiophores branching from aerial hyphae, very short to 380/* in length, commonly 150-240/*, conidial fructification with a single verticil or once branched with branch, conidiiferous cells and chains of conidia divergent, up to 140/* in length, but usually much less. Conidia 2.5-3// globose, smooth, rarely found in quantity to color the colony. Sclerotia elliptical or globose, 160-330/*, pink, developed in 10-15 days. No asci have been secured. Colonies liquefy sugar gelatin rapidly and give a stongly alkaline reaction to litmus in the same cultures. Grows readily in conidial transfers upon all common media. Collected upon decaying Clavaria at Storrs, Conn., September, 1904. Identical culture sent from Cambridge, Mass., by Dr. A. F. Blakeslee in culture obtained from fruit imported from Porto Rico. CULTURAL DATA. Color white or gray, conidial areas gray- green, very numerous pink sclerotia; re- verse colorless or with yellow areas; color in media, none or slightly yellowish. Odor, none. Fifteen per cent gelatin in water, typ- ical white or gray colonies; liquefaction rapid; litmus reaction alkaline. Potato and bean agar, typical, cultures with sugar added become distinctly greener than others. Potato plugs, typical, white or gray with greenish areas, sclerotia, and crystal drops of transpired fluid. Rau- lin's fluid, some growth, not entirely typical. Cohn's solution, weak develop- ment but characteristic. Synthetic fluid (Dox's), carbon sup- plied as: Cane sugar 1.5-20 per cent, typ- ical growth. Lactose 3 per cent, weak growth. Lactic acid 0.9 per cent, no growth. Levulose 3 per ce