9. Growth cream-colored to yellowish to red; aerial mycelium white to gray, a^ Growth becoming red; aerial mycelium white. 32. Sirepiomyces erythraeus . a^. Growth yellow; aerial mycelium mouse-gray to drab. 33. Stre-ptomyces fiavogriseus . 10. Soluble pigment on potato plug brown to brownish red to reddish purple, a^ Growth on potato greenish-colored; spirals formed. 34. Streptomyces diastaticus. a^. Growth on potato gray; no spirals formed. 35. Streptomyces canescens. a'. Growth on potato yellowish-colored. b'. Greenish tinge produced. 36. Streptomyces fimicarius. h^. Pigment reddish brown. 37. Streptomyces felleus. b'. Soluble brown pigment on synthetic agar. 38. Streptomyces achromogenes . a^. Growth on potato pink to reddish purple; spirals produced. 39. Streptomyces noursei. B. Soluble pigment on organic media brown. 1. Pigment deep brown (chromogenic types). a^ Aerial mycelium thin, rose-colored, bi. Spirals produced. 40. Streptomyces roseochromogenes . b^. No spirals formed. 41. Streptomyces cinnamonensis . a?. Aerial mycelium gray to brown to reddish. bi. Growth on organic media greenish to black. 42. Streptomyces olivochromogenes. h^. Growth dark brown. 43. Streptomyces resistomycificus . a^. Aerial mycelium cottony, dark brown; rapid liquefaction of gelatin. 44. Streptomyces diastatochromogenes. &*. Colonies yellow; aerial mycelium white to gray. 45. Streptomyces flavochromogenes . a^. Growth white to gray; aerial mycelium white to gray. 46. Streptomyces hikiniensis. a^ Growth white, fluffy; sporulating hyphae straight. 47. Streptomyces mirahilis. aJ. Growth cream-colored to brown; aerial mycelium gray; sporo- phores in clusters. 48. Streptomyces antihioticus . a^. Aerial mycelium white, turning light pink on certain media; sporophores straight, no spirals. 49. Streptomyces griseocarneus. a^ Aerial mycelium greenish yellow, turning gray; sporophores produced in tufts or whorls. 50. Streptomyces viridoflavus . 2. Growth on synthetic agar dark brown. a^ Aerial mycelium dark gray; spores globose. 51. Streptomyces globosus.
