CLASSIFICATION OF THE ACTINOMYCETES 15 



a 1 . Pigment on nutrient agar faint yellowish. 



77. Streptomyces gougeroti 



b 1 . No soluble pigment; forms oidiospores. 



78. Streptomyces farinosus 



c 1 . Pigment on synthetic media yellowish. 



79. Streptomyces albidus 



e. Growth white to cream-colored; aerial mycelium flesh-colored 

 to light cinnamon-colored. 



80. Streptomyces cinnamoneus 



f. Growth on synthetic media dark to black to almost bluish 

 black; aerial mycelium white to gray. 



a 1 . Soluble pigment produced on autolysis. 



81. Streptomyces violaceoniger 

 b 1 . No soluble pigment. 



82. Streptomyces gedanensis 



g. Growth colorless to yellowish to olive-buff; aerial mycelium 

 water-green. 



83. Streptomyces griseus 



h. Growth bright orange to golden red; aeriaJ mycelium white 

 to yellow. 



84. Streptomyces longissimus 



i. Growth yellow to olive-ocher; aerial mycelium mouse-gray. 



85. Streptomyces olivaceus 



j. Growth yellow; aerial mycelium scant or rose-yellow. 



86. Streptomyces microflavus 



k. Growth yellowish to brown to reddish brown. 

 a 1 . Aerial mycelium white to mouse-gray. 



87. Streptomyces cacaoi 

 Proteolytic action limited. 



a. Soluble pigment produced on synthetic agar. 

 a 1 . Pigment purple. 



88. Streptomyces novaecaesareae 

 b 1 . Pigment brown to black. 



a 2 . Growth on potato gray to brown. 



89. Streptomyces exfoliatus 



b 2 . Growth on potato greenish to black. 



90. Streptomyces gelaticus 



c 2 . Aerial mycelium pigmented green. 



91. Streptomyces glaucus 



b. No soluble pigment on synthetic agar. 



