| SNo. | Scientific Name | Locality | Habitat | Basis of Record | Description | Recorded By | Record Number | Island | Source | Date |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Juncus prismatocarpus | W Maui, Hanaula, S slope | Along trail at margin of pasture/forest interface. | Preserved_Specimen | Wagner, W.L. | 5859 | Maui | BISH | 1988-03-08 | |
| 2 | Juncus prismatocarpus | Hwy 11 outside of Hawaii Volcanoes National Park, pull off on side of road. | Wet, shady roadside | Preserved_Specimen | Uncommon, from very wet soil, leaves flat | Faccenda, K. | 2663 | Hawaii | BISH | 2022-08-13 |
| 3 | Juncus prismatocarpus | Waimea District: Alakai Swamp Trail Stream | Cyperus meyenianus, Carex sp., Poaceae, Mosses. A single patch of this growing in the stream bed a few inches from running water. | Preserved_Specimen | Slender compressed leaves, branching, rooting at nodes. Plants tufted. Leaf blade linear, compressed, septa sporadic along the leaf blade running perpendicular to venation (incomplete?), apices acute to acuminate, inflorescences terminal, | Jablonski, J. | 127 | Kauai | BISH | 2024-09-03 |
| 4 | Juncus prismatocarpus | North Kohala District; Hawi Quadrangle, Parker Ranch. Stock ponds in vicinity of Kehena Reservoir | Emergent vegetation growing along shore & standing water. Floating submergent. | Preserved_Specimen | Engilis Jr., A. | 9203 | Hawaii | BISH | 1992-06-08 | |
| 5 | Juncus prismatocarpus | W Maui, Hanaula, just above reservoirs | In ohia forest, growing in shallow standing water along a distrubed trail in forest. | Preserved_Specimen | Stems flattened, weak. | Hobdy, R.W. | 2398 | Maui | BISH | 1985-05-24 |
| 6 | Juncus prismatocarpus | Waimea Valley, along Kamananui stream, just mauka of Waimea falls. UTM 599169, 2392103. | Lowland riparian setting, growing in water puddle on large boulder. | Preserved_Specimen | Herb to about 40cm tall. | Lau, A. | 2013060301 | Oahu | BISH | 2013-06-03 |
| 7 | Juncus prismatocarpus | Road leading through TNC Kamakou Preserve | From saturated soil along the road on edges of puddles and depressions. In sunny or partly sunny areas | Preserved_Specimen | Common, thousands of plants seen along the road | Faccenda, K. | 2936 | Molokai | BISH | 2022-12-28 |
| 8 | Juncus prismatocarpus | Waimanu Valley, Hamakua District, at base of waterfall on W side of valley ca. 1.5 m from shore | Occasional. Growing among rocks along stream w/Polygonum and grasses. | Preserved_Specimen | Nagata, K.M. | 3893 | Hawaii | BISH | 1988-09-24 |