162 



THK ACTIXOMYCKTES. Vol. II 



I). Aerial mycelium white to gray. 



114. Streptomyces griseo- 

 ruber 



c. Aerial mycelium gray. 



a 1 . No soluble pigmenl on synthetic 

 media. 



95. Streptomyces galilaeus 

 I) 1 . Soluble pigment on synthetic 

 media light carmine. 



52. Streptomyces cinereo- 

 ruber 



d. Aerial mycelium scant; ability to 

 produce such mycelium easily lost . 



31. Streptomyces bobiliat 



e. Aerial mycelium pink, with bluish- 

 green spores. 



28a. Streptomyces lull us 



6. Growth white to cream-colored. 



98. Streptomyces gpirypha- 

 lus 



7. Growth buff to dark brown. 



a. Aerial mycelium gray to dark olive. 



105. Streptomyces gracilis 



b. Aerial mycelium dark gray. 



103. Streptomyces globostts 



c. Aerial mycelium white. 



64. Streptomyces cylindro- 

 sporus 



d. Aerial mycelium tan to light brown. 



115. Streptomyces griseovi- 

 ridis 



8. Growth on synthetic agar dark green 

 to olive-buff. 



a. Aerial mycelium white to light green 

 to blue. 



246. Streptomyces virido- 

 chromogenes 

 1). Aerial mycelium thin, white. 



211. Streptomyces roseocit- 



c. Aerial mycelium pale gray to blue- 

 gray. 



49. Streptomyces chartreu 



9. Growth dark brown to black. 



a. Growth on potato orange to orange- 

 red. 



a 1 . No aerial mycelium on potato. 

 200. Streptomyces purpur- 

 eochromogenes 

 b 1 . Aerial mycelium scant to none; 

 light brownish-gray. 



ISO. Sin plum arcs phaeo 

 purpureus 

 c 1 . Aerial mycelium on potato 

 abundant , gray. 



198. Streptomyces purpur- 

 eofuscus 

 d 1 . Aerial mycelium on potato pow- 

 dery white. 



132. Streptomyces lanatus 

 b. Growth on potato brown to black. 

 Aerial mycelium on synthetic agar 

 white to brownish. 

 a 1 . Aerial mycelium abundant. 

 a 2 . Spirals formed. 



185. Streptomyces phaeo- 

 chromogenes 

 b 2 . No spirals. 



153. Streptomyces melano- 

 genes 



b 1 . Aerial mycelium on synthetic 

 agar slight. 



168. Streptomyces nobori- 

 toensis 



10. Growth on synthetic media colorless 

 to light orange. 



a. Aerial mycelium gray to cinnamon- 

 drab. 



26. Streptomyces minus 



b. Aerial mycelium white to gray. 



192. Streptomyces poolensis 



c. Aerial mycelium olive-buff. 



194. Streptomyces praefe- 

 cundus 



11. Growth on synthetic agar whitish- 

 yellow to grayish-yellow. 



a. Soluble pigment light yellow. 

 a 1 . Aerial mycelium white-gray. 



a'-. Aerial mycelium on potato 

 gray. 

 231. Streptomyces tana- 

 shiensis 

 b 2 . No aerial mycelium on po- 

 tato. 



78. Streptomyces filipinen- 

 sis 

 I) 1 . Aerial mycelium olive-colored. 

 137. Streptomyces loidensis 



b. Soluble pigment brown to reddish 

 brown. 



154. Streptomyces michigan- 

 ensis 



12. ( irowth on synthetic agar gray to olive- 

 gray. 



44. Streptomyces carnosus 



13. Growth on synthetic media red to 

 purple. 



a. Aerial mycelium white to gray. 



71. Streptomyces erythro- 

 chromogenes 



b. Aerial mycelium green. 



