152 MANUAL OF DETERMINATIVE BACTERIOLOGY 



bbbb. Starch hydrolysis not reported. 



c. Nitrites produced from nitrates. 



34. Xanthomonas antirrhini. 



35. Xanthomonas heterocea. 

 cc. Nitrites not produced from nitrates. 



36. Xanthomonas gummisudans . 



37. Xanthomonas lactxicae. 



38. Xanthomonas nigromaculans . 

 aa. Gelatin not liquefied. 



b. Starch not hydrolyzed. 



39. Xanthomonas oryzae. 

 aaa. Gelatin not reported. 



b. Starch hydrolyzed. 



40. Xanthomonas celebensis. 

 2. Colonies whitish to cream. 



a. Gelatin liquefied. 



b. Starch hydrolyzed. 



c. Nitrites produced from nitrates. 



41. Xanthomonas panici. 



42. Xanthomonas proteomaculans . 



43. Xanthomonas majuhotis. 

 cc. Nitrites not reported. 



44. Xanthomonas ruhrisnhalhicans . 

 bb. Starch not reported. 



45. Xanthomonas cannae. 



46. Xanthomonas zingiberi. 



47. Xanthomonas conjaci. 



1. Xanthomonas hyacinthi (Wakker) Milk: Casein is precipitated and 



Dowson. {Bacterium hyacinthi Wakker, digested. Tyrosine crystals produced. 

 Botan. Centralblatt, 14-, 1883, 315; Nitrites not produced from nitrates. 



Bacillus hyacinthi Trevisan, I generi e le Indole : Slight production, 



specie delle Batteriacee, 1889 ; 19 ; Pseudo- Hydrogen sulfide is produced. 



monas hyacinthi Erw. Smith, Bot. Acid, no gas, from glucose, fructose, 



Gazette, ^4) 1897, 188; Phyiomonas galactose, suci'ose and maltose. 

 hyacinthi Bergey et al., Manual, 1st ed., Starch: Hydrolysis slight. 



1923, 177; Dowson, Cent. f. Bakt., II Optimum temperature 28° to 30°C. 



Abt., 100, 1939, 188.) From Gr. hy- Maximum 34° to 35 °C. Minimum4°C. 

 acinthus, the hyacinth; M. L. Hi/a- Aerobic, with the exception of maltose, 



cinthus, a generic name. where it is facultative anaerobic. 



Description from Smitli, Div. Veg. Habitat: Produces a yellow rot of 



Phys. and Path., U. S. D. A. Bui. 26, hyacinth bulbs, Hyacinthus orientalis. 

 1901, 40. 



Rods: 0.4 to 0.6 by 0.8 to 2 microns. 2. Xanthomonas pruni (Erw. Smith) 



Motile with a polar flagellum. Filaments Dowson. {Pseudomonas pruni Erw. 



present. Gram-negative. Smith, Science, N. S. 17, 1903, 456; 



Gelatin: Slow liquefaction. jBacieHfwi pr?<m Erw. Smith, Bacteria in 



Agar colonies: Circular, flat, moist, Relation to Plant Dis., 1, 1905, 171; 



shining, bright yellow. Media stained Bacillus pruni Holland, Jour. Bact., 5, 



brown. 1920, 220; Phytomonas pruni Bergey et 



