CLASSIFICATION OF THE ACTINOMYCETES 11 



d. Growth cream-colored to brown; aerial mycelium white to 

 yellowish. 

 a 1 . Soluble pigment yellow to yellow-orange. 



22. Streptomyces albidofiavus 



b 1 . Soluble pigment yellowish to yellow-green. 

 a 2 . Aerial mycelium white to yellow. 



23. Streptomyces lieskei 

 b J . Aerial mycelium gray. 



a 8 . Growth on synthetic agar yellowish green. 



24. Streptomyces flavovirens 



b 3 . Growth on synthetic agar yellow; produces soluble 

 yellow pigment on calcium-malate-glycerol agar. 

 24a. Streptomyces cellulofiavus 



c 8 . Growth on glucose-asparagine agar yellow, becom- 

 ing black. 



25. Streptomyces limosus 



6. Growth cream-colored; soluble pigment yellowish brown to 

 reddish brown. 



26. Streptomyces griseoluteus 



7. Growth coral-red; aerial mycelium scant, white; soluble pigment 

 brown. 



a. Gelatin rapidly liquefied. 



27. Streptomyces bobiliae 



b. Gelatin slowly liquified. 



28. Streptomyces aurantiacus 



8. Growth on synthetic media mouse-gray; aerial mycelium white 

 to gray. 



a. Sporophores straight. 



29. Streptomyces griseolus 



b. Sporophores broom-shaped. 



30. Streptomyces fasciculus 



9. Growth cream-colored to yellowish to red; aerial mycelium 

 white to gray. 



a. Growth becoming red; aerial mycelium white. 



31. Streptomyces erythreus 



b. Growth yellow; aerial mycelium mouse-gray to drab. 



32. Streptomyces flavogriseus 



10. Soluble pigment on potato plug brown to brownish red to red- 

 dish purple, 

 a. Growth on potato greenish-colored; spirals formed. 



33. Streptomyces diastaticus 



