Herbaspirillum

**Definition:** A genus of gram-negative bacteria in the family OXALOBACTERACEAE, which comprises vibrioid or sometimes helical cells. They are chemoorganotrophic nitrogen fixers and are found free-living in the soil or in association with the roots of members of the GRAMINEAE. (From Bergey's Manual of Determinative Bacteriology, 9th ed)

**Tree numbers:** - B03.440.400.425.587.400 - B03.585.500 - B03.660.075.090.883.400