750 ORDER V. ACTINOMYCETALES 



b'. Pigment purple. 



91. Streptoryiyces novaecaesareae. 

 b^. Pigment brown to black. 



c'. Growth on potato gray to brown. 



92. Streptomyces exfoliatiis. 



c^. Growth on potato greenish to black. 



93. Streptomyces gelaticus. 



c'. Aerial mycelium pigmented green. 



94. Streptomyces glaucns. 

 a*. No soluble pigment on synthetic agar. 



b^ Growth dark brown to almost black; aerial mycelium 

 white to gray. 



c^ Abundant spirals in aerial mycelium, 

 d^. Conidia spherical to ellipsoidal. 



95. Streptomyces rutgersensis . 



d"^. Conidia ellipsoidal to cylindrical. 



96. Streptomyces halstedii. 



c^. No spirals produced on synthetic agar. 



d^. Spores cylindrical; growth on synthetic agar 

 dark brown. 



97. Streptomyces fumosus. 



d^. Spores ellipsoidal. Growth on synthetic agar 

 light brown. 



98. Streptomyces lipmanii. 



b^. Growth cream-colored to yellow or yellow-orange. 



0^ Aerial mycelium on certain media white, moist 

 with dark, glistening patches; spores ellipsoidal. 



99. Streptomyces hygroscopiciis. 



c^. Aerial mycelium white-yellow to brownish yel- 

 low; spores cylindrical. 



100. Streptomyces longisporoflavus . 



c". Aerial mycelium w^hite; spores cylindrical. 



101. Streptomyces candidus. 



c^. Aerial mycelium powdery white with yellow tinge. 



102. Streptomyces alboflavus. 



c*. Growth cream-colored; aerial mj'celium cottony 

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

 lowish. 



103. Streptomyces flocculus. 



c". Aerial mycelium gray; slight darkening of potato 

 plug. 



104. Streptomyces antimycoticus. 

 b^. Growth orange or red. 



ci. Growth yellowish to orange; aerial mycelium sea- 

 shell-pink. 



105. Streptomyces fradiae. 



c^. Growth rose to red; aerial mycelium white. 



di. Growth on gelatin j-ellow to red; slow lique- 

 faction. 



106. Streptomyces albosporeus. 



d^. Growth light brown; rapid liquefaction. 



107. Streptomyces purpurascens. 



c^ Growth light rose to purple-red; aerial mycelium 



