16 ACTINOMYCETES 



Growth dark brown to almost black; aerial mycelium 

 white to gray. 



a 2 . Abundant spirals in aerial mycelium. 

 a 3 . Conidia spherical to oval. 



92. Streptomyces rutgersensis 

 b 3 . Conidia oval to cylindrical. 



93. Streptomyces halstedii 



b 2 . No spirals produced on synthetic agar. 



a 3 . Spores cylindrical; growth on synthetic agar dark 

 brown. 



94. Streptomyces fumosus 

 b 3 . Spores oval. 



a 4 . Growth on synthetic agar light brown. 



95. Streptomyces lipmanii 



Growth cream-colored to yellow or yellow-orange. 



a 2 . Aerial mycelium on certain media white, moist with 



dark, glistening patches; spores oval. 



96. Streptomyces hygroscopicus 



Aerial mycelium white-yellow to brownish yellow; spores 

 cylindrical. 



97. Streptomyces longisporoflavus 



c 2 . Aerial mycelium white; spores cylindrical. 



98. Streptomyces candidus 



d 2 . Aerial mycelium powdery white, with yellow tinge. 



99. Streptomyces alboflavus 



e 2 . Growth cream-colored; aerial mycelium cottony 

 white; pigment in milk and on potato rose to yellow- 

 ish. 



100. Streptomyces flocculus 



f 2 . Aerial mycelium gray; slight darkening of potato 

 plug. 



101. Streptomyces Leben, Stessel and Keitt 

 Growth orange or red. 



a 2 . Growth yellowish to orange; aerial mycelium seashell- 

 pink. 



102. Streptomyces fradiae 



b 2 . Growth rose to red; aerial mycelium white. 



a 3 . Growth on gelatin yellow to red; slow liquefaction. 



103. Streptomyces albosporeus 



b s . Growth light brown; rapid liquefaction. 



104. Streptomyces purpurescens 



c 2 . Growth light rose to purple-red; aerial mycelium 



