| SNo. | Scientific Name | Locality | Habitat | Basis of Record | Description | Recorded By | Record Number | Island | Source | Date |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Stachytarpheta cayennensis × Stachytarpheta jamaicensis | Mauumae Ridge, Koolau Mts, found early on the trail | In dry shrubland, growing with Stachytarpheta cayennensis, Stachytarpheta jamaicensis, and other trailside weeds | Preserved_Specimen | Perennial herb, aerect, ca 55-60 cm tall; flowers dark purple; ca 5-10 putative hybrids seen | Ross, M.C. | 2120 | Oahu | BISH | 2025-07-10 |
| 2 | Stachytarpheta cayennensis × Stachytarpheta jamaicensis | Kamananui Valley Trail, Honoluu | Growing along the trail with Stachytarpheta cayennensis, Themeda villosa, and Ageratum houstonianum. Stachytarpheta jamaicensis also observed nearby. | Preserved_Specimen | Perennial herb, erect, ca 120-130 cm tall; corolla light blue, throat white. Only one putative hybrid colony observed. | Ross, M.C. | 1970 | Oahu | BISH | 2024-01-31 |
| 3 | Stachytarpheta cayennensis × Stachytarpheta jamaicensis | Kamananui Valley Trail, Honoluu | Growing along the trail with Stachytarpheta cayennensis, Themeda villosa, and Ageratum houstonianum. Stachytarpheta jamaicensis also observed nearby. | Preserved_Specimen | Perennial herb, erect, ca 120-130 cm tall; corolla light blue, throat white. Only one putative hybrid colony observed. | Ross, M.C. | 1970 | Oahu | BISH | 2024-01-31 |