FAMILY II. ACTINOMYCETACEAE 717 



b. Growth on agar whitish. 



21. Nocardia albicans. 



c. Growth on agar yellow. 



22. Nocardia jlava. 



d. Growth on agar green. 



23. Nocardia viridis. 



e. Growth on agar yellow-green. 



24. Nocardia citrea. 



f. Growth on agar pink to crimson. 



25. Nocardia madurae. 



g. Growth on agar dark brown and even black. 



26. Nocardia nigra. 

 h. Growth consistency soft; aerial mycelium sparse. 



27. Nocardia lutea. 



i. Growth consistency medium; aerial mycelium profuse. 



28. Nocardia hlackwellii. 



j. Good action on milk; growth consistency firm; aerial mycelium liiieral. 



29. Nocardia cunicidi. 

 k. Pigment on protein media deep brown. 



30. Nocardia rangoonensis. 

 1. Pigment on protein media light brown. 



31. Nocardia caviae. 

 2. Proteolytic. 



a. Growth on nutrient agar with rapid formation of unbranched, diphtheroid- 

 like rods; no typical cystites; broth turbid. 



32. Nocardia actinornorpha. 



b. Growth white, shiny or pale; dough-like consistency; breaks up into short 

 rods. 



33. Nocardia alba. 



c. Growth on nutrient agar with extensive mycelium; simple unbranched rods 

 not formed; cystites present. Broth clear. 



34. Nocardia flavescens. 



d. Growth cream-colored. 



35. Nocardia gibsonii. 



e. Growth rose-colored to bright red or red-orange. 



36. Nocardia fructif era. 



f. Growth pink. 



a. Gelatin not liquefied. 



37. Nocardia africana. 

 aa. Gelatin liquefied, at first slowly, then completely. 



38. Nocardia pelletieri. 



g. Colonies orange-yellow to orange-red, which may change to black. 



39. Nocardia maculata. 

 h. Pigment on protein media light brown. 



40. Nocardia rhodnii. 

 i. Pigment on protein media green to greenish brown. 



41. Nocardia gardneri. 

 j. Growth yellowish to golden brown. 



42. Nocardia fordii. 



k. Growth yellow to reddish brown; soluble pigment brown to red. 



43. Nocardia kuroishi. 

 B. Marine species. Digest agar. 



