following system of elassifieat 

 posed for the genus Streptomyc 



GROUPS AND SPECIES OF GENUS STREPTOMYCES 



was pi-o- 



99 



A. Spores spiny or hairy. 

 I. Aerial mycelium blue. 



1. Streptomyces \ irido 

 chromogt nes 



1 1. Aerial mycelium not blue. 



1 . Aerial mycelium white. 



2. Strt ptomyct s />u r 

 purasct ns 



2. Aerial mycelium no1 white. 



a. Aerial mycelium green. 



a 1 . Spores with short spines. 



3. Streptomyces pra- 



Sl II IIS 



I) 1 . Spores with longer spines or with 

 ha if. 

 a' J . Spores with s1 ill spines. 



4. Strt ptomyci s hirsu 



his 

 b 2 . Spores with flexible hair. 



."). Streptomyces pra- 

 sinopilosus 



b. Aerial mycelium gray. 



a'. Sporophores in verticils. 



a 2 . Sporophores in open spirals; 

 no melanin formation. 



6. Streptomyces nour- 

 sei* 



b 2 . Sporophores in closed spirals; 

 melanin produced. 



7. Strt ptomyces echi- 



n il his* 

 I) 1 . Sporophores not in verticils. 



a'-'. Sporophores in closed spirals. 

 s. Streptomyces albo- 

 griseolus 

 l>'-\ Sporophores in open spirals. 

 a 3 . Spirals irregular. 



!). Streptomyces mac- 

 rosport us 

 b 3 . Spirals regular. 

 a'. Spores spiny. 



10. Streptomyces grist 

 ojlariis 



I) 1 . Spores hairy. 

 a 5 . Spirals w it h > ."> I urns; 

 melanin posit ive. 



11. Streptomyces pilo 

 sus 



The \erl i( 



te nat lire of 



"«■• 



Figure 27. Sporogenons coiled hyphae of Strep- 

 tomyces T3110; taken from a gray area of a colony 

 (Reproduced from: Duggar, B. M. et al. \nn. 

 X. Y. Acad. Sci. 60: 71 -85, 1954). 



!>'. Spirals with <o turns, 

 melanin-negal ive. 

 12. Strt ptomyces flaveo- 



lus 

 B. Spores smool h. 



I. Aerial mycelium yellowish- to greenish- 

 gray. 



1. Melanin -negative. 



L3. Sin ptomyct s gri- 

 seus 



2. Melanin positive. 



14. Streptomyces michi- 

 garu nsis 



II. Aerial mycelium white. 



1 . Sporophores in verticils. 



15. Sin ptomyt t s rubri- 

 reticuli 



2. No verticils produced. 



a. Sporophores form spirals. 



Hi. Sh i ptomyt ' s nive- 

 orubt r 



b. Sporophores straighl or wavy. 

 a 1 . Melanin negative. 



17. Sin ptomya sfulvis* 



si III IIS 



li 1 . Melanin posit ive. 



is. Streptomyces 

 phaeochromogenes 



