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THE ACTINOMYCETES, Vol. II 



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Plate I. Diagrammatic representation of the morphology of the sporophores of Streptomyees (Re- 

 produced by special permission from El i linger et al. Arch. Mikrobiol. 31: 336, 1958). 

 a. Sporophores produce straight branching verticils on sterile aerial hyphae; S. reticuli type. 1). Sporo- 

 phores produce open spirals as side branches on sterile aerial hyphae; S. purpurascens type. c. Sporo- 

 phores produce on sterile aerial hyphae verticils with open, more or less regular spirals; S. nourst i type. 

 d. Sporophores formed as side branches <>n sterile aerial hyphae, straight or slightly wavy; S. phaeo- 

 chromogenes . e. Sporophores produced as verticils on sterile aerial h\ phae, with open, irregular spirals; 

 ,s'. echinatus. f. Sporophores monopodially branched, forming irregular open spirals at the end of long 

 hyphae; S. lavendulae. g. Sporophores monopodially branched, with open, regular spirals; S. parvullus. 



