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Juncus planifolius

Bernice Puahi Bishop Museum · CC BY-NC · GBIF · full resolution

BISH 120822Botany

Juncus planifolius

Flat-leaved Rush

As recorded: Juncus planifolius R.Br.

Plantae › Tracheophyta › Liliopsida › Poales › Juncaceae

Collected by: Degener, O.; Greenwell, A.Otto Degener →Arthur Greenwell →
Collector number: 21835
Date: February 15, 1952
Locality: Mauka of Kulani Prison
Island: Hawaiʻi Island
Region: Hawaii, United States
Elevation: 1,524 m
Identified by: Coffey, J.C.
Record type: Preserved specimen

100 Bishop specimens of Juncus planifolius · collected 1909–2024Species page ›

Juncus planifolius observed alive in Hawaiʻi

This specimen was collected in 1952. Since 2000, iNaturalist observers have recorded 131 research-grade sightings in the wild, most recently on 2026-08-07.

Juncus planifolius observed 2026-08-07

2026-08-07

Honolulu County, HI, USA

(c) Daniel Ward, some rights reserved (CC BY-NC)

Juncus planifolius observed 2026-07-26

2026-07-26

Kīlauea Iki Trail, Pahoa, HI, US

(c) atcgnyc, some rights reserved (CC BY-NC)

Juncus planifolius observed 2026-07-22

2026-07-22

Captain Cook, HI, US

(c) Kellen Apuna, some rights reserved (CC BY-NC)

Juncus planifolius observed 2026-06-28

2026-06-28

Hanapepe, HI 96716, USA

(c) Curtis Mahon, some rights reserved (CC BY-NC)

Juncus planifolius observed 2026-06-25

2026-06-25

Princeville, HI, US

(c) Tim Guida, some rights reserved (CC BY-NC)

Juncus planifolius observed 2026-06-20

2026-06-20

Kauai County, HI, USA

(c) Nick Moore, some rights reserved (CC BY-NC)

Observations and photos from iNaturalist, shown only when openly licensed.

Cite this specimen

Juncus planifolius. BISH 120822. Bernice Pauahi Bishop Museum, Honolulu. GBIF occurrence 5956605005. Accessed via explore.bishopmuseum.org/specimens/bish/120822.

Record sources

GBIF occurrence 5956605005 ↗
Data license: CC_BY_NC_4_0
Last harvested October 26, 2026