Greenish yellow soluble pigment formed. Only a trace of nitrite is produced from nitrates. Aerobic. Optimum temperature, 25° C. Antagonistic properties: Active against fungi. Source: Isolated from soil. Habitat: Soil. 25. Streptoniyces celluloflavus Nishi- mura et al., 1953. (Nishimura, Kimura and Kuroya, Jour. Antibiotics (Japanese), 6, 1953, 57.) cel.lu.lo.fla'vus. L. dim.n. cellula a small room; M.L. n. cellulosutn cellulose; L. adj. flavus yellow; M.L. adj. celluloflavus cellu- lose-yellow (probably intended to mean turning cellulose yellow). Aerial mycelium: A few imperfect spirals. Almost spherical spores, 0.9 by 1.0 micron. Gelatin: Ivory-j-ellow to olive-buff colo- nies on surface of liquefied portion. No aerial mycelium. Faint brownish pigment. Rapid to medium liquefaction. Agar: Olive-buff growth turning colorless. Scant, cottony, white to grayish aerial mycelium. Soluble yellow pigment with tinge of green to old gold. Synthetic agar: Glossy growth, develop- ing deep into medium, later becoming mar- guerite-yellow. Faint sulfur-yellow soluble pigment. Ca-malate glycerol agar: Primrose-yellow growth, later turning white to pale olive- buff, with blackish center. Cottony aerial mycelium white with grayish patches, later turning olive-buff. Soluble citron-j-ellow pigment. Glucose agar: Cream-colored to yellow growth. Scant cottony white to gray aerial m3^celium. Soluble sulfur-yellow pigment. Milk: Yellow to dark olive-buff growth. White aerial mycelium. Soluble reddish brown pigment. Coagulated and rapidly peptonized. Potato: Wrinkled, spreading, deep olive- buff growth. Aerial mycelium white to olive- buff. Soluble deep olive-buff pigment. Poor growth on cellulose with soluble, yellow pigment. Tyrosine medium: Ivory-yellow to cream- buff growth. None to scant white aerial mycelium. Soluble greenish yellow pigment. Antagonistic properties: Produces thiolu- tin. Source: Isolated from soil. Habitat: Soil. 26. Streptoniyces limosus Lindenbein, 1952. (Arch. f. Mikrobiol., 17, 1952, 379.) li.mo'sus. L. adj. limosus full of slime, slimy. Vegetative growth: Crumb-like, yellow- ish, later becoming gray to coal-black; greenish yellow reverse. Aerial mycelium: Powdery snow-white to gray, or completely lacking. Soluble green- ish yellow to citron-yellow pigment. Gelatin: Yellow-brown growth. No aerial mycelium. Soluble, dark brown pigment. Complete liquefaction. Agar: Diffuse, colorless growth with light brown reverse. No aerial mycelium. Soluble pigment around bottom. Synthetic agar: Diffuse, colorless growth, later becoming crumb-like, light yellow. No aerial mycelium. Soluble citron-yellow pig- ment. Glucose asparagine agar: Crumb-like, | light yellow growth, later becoming black with citron-yellow reverse. Aerial mycelium white, later ash-gray. Soluble citron-yellow pigment. Ca-malate agar: Crumb-like growth with dark yellow reverse. Aerial mycelium pow- dery to velvety, white, later ash-gray. Solu- ble golden yellow pigment. Starch agar: Small, yellowish colonies with brownish reverse. Aerial mj'celium velvety, gray-white. Soluble light gray pig- ment. Glucose agar: Good growth with yellow- brown reverse. Aerial mycelium velvet}', white-gray to ash-gray. Soluble yellow- brown pigment. Glucose broth: Growth in the form of sediment, white, later light yellow. No aerial mycelium. Soluble citron-yellow pig- ment. Milk: Lichenoid, light yellow growth. Aerial mycelium powder}', gray-white. Soluble light brown pigment. Actively pep- tonized. Potato: Moderate, brownish yellow to light brown growth. Aerial mycelium pow- dery, gray-white. Soluble citron-yellow to sulfur-yellow pigment.
