746 ORDER V. ACTINOMYCETALES 



5. Growth yellow to greenish or orange-colored; soluble pigment yellow to golden 

 yellow. 



ai. Growth yellow to green; pigment insoluble. 



14. Streptomyces vir gains. 



a^. Growth sulfur-yellow; soluble pigment yellow, 

 bi. Conidia ellipsoidal. 



c^ Aerial mycelium white. 



15. Streptomyces flaveolus. 

 c". Aerial mycelium light yellow. 



16. Streptomyces parvus. 



0^ Aerial mycelium white to gray to reddish gray. 



17. Streptomyces xanthophaeus . 

 b^. Conidia spherical; cellulose decomposed. 



18. Streptomyces cellulosae. 



a^ Growth reddish brown to orange-colored to cinnamon-drab, 

 covered with white to gray aerial mycelium; soluble pigment 

 on synthetic media yellowish. 

 b'. Soluble pigment yellow. No liquefaction of gelatin. 



19. Streptomyces rimosus. 



b^. Faint yellowish coloration of liquefied gelatin. IVIilk 

 rapidly peptonized. 



20. Streptomyces griseoflavus. 

 b^ Soluble pigment golden yellow. 



21. Streptomyces aureofaciens. 



a^. Growth cream-colored to brown; aerial mycelium white to yel- 

 lowish, 

 b^. Soluble pigment yellow to yellow-orange. 



22. Streptomyces alhidoflavus. 

 b^. Soluble pigment yellowish to yellow-green. 



c^ Aerial mycelium white to yellow. 



23. Streptomyces lieskei. 

 c^. Aerial mycelium gray. 



d^ Growth on synthetic agar yellowish green. 



24. Streptomyces flavovirens. 



d^. Growth on synthetic agar j^ellow; produces 

 soluble yellow pigment on Ca-malate-glycerol 

 agar. 



25. Streptomyces celluloflavus . 



d^. Growth on glucose-asparagine agar yellow, 

 becoming black. 



26. Streptomyces limosus. 



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



27. Streptomyces griseoluteus . 



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



a'. Gelatin rapidly liquefied. 



28. Streptomyces hohiliae. 

 a^. Gelatin slowly liquefied. 



29. Streptomyces aurantiacus. 



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



a^ Sporophores straight. 



30. Streptomyces griseolus. 

 a^. Sporophores broom-shaped. 



31. Streptomyces fasciculus. 



