Seeds Prohibited Entry into the U.S. - I & J
| Botanical Name | Authority |
|---|---|
| Ileostylus spp. | Parasitic |
| Ilex cookii | ESA-E |
| Ilex sintenisii | ESA-E |
| Iliamna corei | ESA-E |
| Impatiens parviflora | NAPPRA |
| Imperata brasiliensis | NW |
| Imperata cylindrica | NW |
| Indigofera hirsuta | FSA-A |
| Indocalamus spp. | Poa. |
| Indosasa spp. | Poa. |
| Inula britannica | NW |
| Iodina spp. | Parasitic |
| Ipomoea aquatica | NW |
| Ipomaea pes-tigridis | NAPPRA |
| Ipomopsis polyantha | ESA-E |
| Ipomopsis sancti-spiritus | ESA-E |
| Iris lacustris | ESA-T |
| Isachne globose | NAPPRA |
| Ischaemum muticum | NAPPRA |
| Ischaemum rugosum | NW |
| Ischaemum byrone | ESA-E |
| Isodendrion hosakae | ESA-E |
| Isodendrion laurifolium | ESA-E |
| Isodendrion longifolium | ESA-E |
| Isodendrion pyrifolium | ESA-E |
| Isoetes louisianensis | ESA-E |
| Isoetes melanospora | ESA-E |
| Isoetes tegetiformans | ESA-E |
| Isotria medeoloides | ESA-T |
| Ivesia kingii v. eremica | ESA-T |
| Ivesia webberi | ESA-T |
| Ixocactus spp. | Parasitic |
| Jacquemontia reclinate | ESA-E |
| Jatropha costaricensis | ESA-E |
| Jodina spp. | Parasitic |
| Joinvillea ascendens ascendens | ESA-E |
| Juelia spp. | NW |
| Juglans jamaicensis | ESA-E |
| Justicia cooleyi | ESA-E |