| australia | | azolla pinnata subsp. pinnata | subspecies | 4 | 0 |
| australia | | azolla rubra | species | 1 | 0 |
| brazil | | azolla caroliniana | species | 1 | 0 |
| cameroon | south region | azolla pinnata subsp. africana | subspecies | 6 | 0 |
| canada | british columbia | azolla caroliniana | species | 1 | 0 |
| canada | british columbia | azolla filiculoides | species | 2 | 0 |
| canada | british columbia | azolla mexicana | species | 1 | 0 |
| china | | azolla caroliniana | species | 4 | 0 |
| china | zhejiang | azolla sp. fu-ch153 | species | 1 | 0 |
| china | zhejiang | azolla sp. fu-ch322 | species | 1 | 0 |
| cook islands | | azolla sp. chr 451298 | species | 1 | 0 |
| ecuador | | azolla microphylla | species | 1 | 0 |
| india | | azolla pinnata | species | 3 | 0 |
| india | gujarat | azolla pinnata | species | 0 | 1 |
| india | madhya pradesh | azolla pinnata | species | 0 | 4 |
| iran | | azolla sp. qiu 02051 | species | 4 | 0 |
| japan | | azolla imbricata | species | 1 | 0 |
| mozambique | | azolla cristata | species | 4 | 0 |
| netherlands | | azolla filiculoides | species | 1 | 0 |
| netherlands | utrecht province | azolla filiculoides | species | 2 | 0 |
| south africa | | azolla cristata | species | 11 | 0 |
| south africa | | azolla pinnata subsp. asiatica | subspecies | 2 | 0 |
| sudan | | azolla nilotica | species | 1 | 0 |
| taiwan | | azolla japonica | species | 4 | 0 |
| taiwan | | azolla pinnata | species | 4 | 0 |
| thailand | | azolla pinnata subsp. asiatica | subspecies | 2 | 0 |
| uganda | | azolla cristata | species | 1 | 0 |
| uganda | | azolla filiculoides | species | 1 | 0 |
| uganda | | azolla microphylla | species | 1 | 0 |
| united states | | azolla caroliniana | species | 20 | 0 |
| united states | | azolla mexicana | species | 1 | 0 |
| united states | | azolla pinnata subsp. pinnata | subspecies | 5 | 0 |
| uruguay | | azolla caroliniana | species | 1 | 0 |
| zambia | luapula province | azolla pinnata subsp. africana | subspecies | 1059 | 0 |
| zimbabwe | | azolla cristata | species | 1 | 0 |