FAMILY PSEUDOMONADACEAE 



211 



Maltose agar: Abunilant yellowish to 35°C. No growth at 37 °C. Thermal 



growth. death point 44° to 45°C. 



Lactose agar: Very heavy growth. Aerobic 



Starch agar : Very abundant yellowish „ t , , , 



, , bource : Isolated from forest soil in 

 growth . 



Nutrient broth : No growth. Germany and from soils in the United 



Temperature relations: Optimum 25° states. 



to30°C. Minimum 5°C. Maximum 32° Habitat: Widely distributed in soils. 



Genus IV. Cellfalcicula W inogradshy .* 



(Ann. Inst. Pasteur, 43, 1929, 616.) From M. L. cell, an abbreviation for cellulose; 

 Latin dim.., Jalcicula, a small sickle. 



Short rods or spindles, not exceeding 2.0 microns in length, with pointed ends, 

 containing metachromatic granules. Old cultures show coccoid forms. Monotri- 

 chous. Oxidize cellulose, forming o.xycellulose. Growth on ordinary culture media 

 is feeble. Soil bacteria. 



The type species is Cellfalcicula viridis Winogradsky. 



1. Cellfalcicula viridis Winogradsky. 

 (Ann. Inst. Pasteur, iS. 1929. 616 .) From 

 Latin, viridis, green. 



Plump, small spindles, 0.7 by 2.0 

 microns, with rounded ends. Motile 

 with a single flagellum. Gram-negative. 



Produces diffuse green, mucilaginous 

 colonies on cellulose silica gel medium. 



Filter paper streaks : Rapid spreading 

 growth colored green in 3 days at 30 °C. 



Hydrocellulose agar: Growth rapid, 

 green; minute yellowish-green, mucous 

 colonies on streaking. 



No growth on peptone, glucose, starch 

 or gum agar. 



Aerobic, facultative. 



Optimum temperature 20°C. 



Habitat : Soil. 



2. Cellfalcicula mucosa Winogradsky. 

 (Ann. Inst. Pasteur, 43, 1929, 621.) From 

 Latin, viucosus, mucous. 



Plump, curved spindles, with slightly 

 pointed ends. Motile with a single polar 

 flagellum. Contain a single chromatic 

 granule. Gram-negative. 



Produces diffuse, cream-colored, muci- 



laginous colonies on cellulose silica gel 

 medium. 



Hydrocellulose agar : Abundant grayish 

 growth. 



No growth on peptone, glucose, 

 starch or gum agar. 



Aerobic, facultative. 



Optimum temperature 20°C. 



Habitat: Soil. 



3. Cellfalcicula fusca Winogradsky. 

 (Ann. Inst. Pasteur, 43, 1929, 622.) From 

 Latin, fuscus, dark, tawny. 



Plump, curved spindles, 0.5 by 1.2 to 

 2.5 microns, with slightly pointed ends 

 and a central chromatic granule. Motile 

 with a single polar flagellum. Gram- 

 negative. 



Produces diffuse, brownish, slightly 

 marbled or veined colonies on cellulose 

 silica gel medium. 



Filter paper streak : Paper becomes a 

 partially transparent, dry, non-muci- 

 laginous pellicle adhei-ent to gel. 



Aerobic, facultative. 



Optimum temperature 20 °C. 



Source : Isolated from a pile of old damp 

 sawdust. 



Habitat: Probably rotting wood. 



* Revised by Prof. Robert S. Breed, New York State Experiment Station, Geneva 

 i^ew \ork, Sept., 1937; no change, July, 1943. 



