| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Rhizobium sullae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium subbaraonis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium straminoryzae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium sphaerophysae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium sophoriradicis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium sophorae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium soli | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium smilacinae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium selenitireducens | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium ruizarguesonis | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium rosettiformans | ||||
| Rhizobium rhizoryzae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium rhizophilum | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium rhizogenes | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium puerariae | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium populi | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium pisi | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium phaseoli | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium petrolearium | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium paranaense | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium paknamense | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium pakistanense | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium oryzicola | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium naphthalenivorans | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium multihospitium | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium mongolense subsp. mongolense | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium mongolense | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium mongolense subsp. loessense | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium miluonense | Unknown | Valid (ICNP) | Excubia bot about 5 years ago | |
| Rhizobium metallidurans | Unknown | Valid (ICNP) | Excubia bot about 5 years ago |