Bernice Puahi Bishop Museum · CC BY-NC · GBIF · full resolution
Hymenasplenium unilaterale
Halved-Spleenwort
As recorded: Hymenasplenium unilaterale (Lam.) Hayata
Plantae › Tracheophyta › Polypodiopsida › Polypodiales › Aspleniaceae
- Collected by
- Herbst, D.R.
- Collector number
- 337
- Date
- February 25, 1967
- Locality
- Waianae Mts., first gully below Peacock Flats, in small, dead-end side gully on left (as ascending) ca. 1 mi from beginning of trail
- Island
- Oʻahu
- Region
- Hawaii, United States
- Elevation
- 488 m
- Identified by
- Smith, A.R.
- Record type
- Preserved specimen
Collected the same day
On February 25, 1967, Herbst, D.R. also collected 7 other specimens.
Hymenasplenium unilaterale observed alive in Hawaiʻi
This specimen was collected in 1967. Since 2000, iNaturalist observers have recorded 23 research-grade sightings in the wild, most recently on 2026-06-08.

2026-06-08
Maui County, US-HI, US
(c) Remy Henderson, some rights reserved (CC BY-NC)

2025-11-22
Hawaii, US
(c) Julien Carley-Windeler, some rights reserved (CC BY-NC)

2025-10-05
Hawaii, US
(c) Daniel Ward, some rights reserved (CC BY-NC)

2025-04-15
Hawaii, US
(c) Julien Ueda, some rights reserved (CC BY-NC)

2025-01-23
Hawaii, US
(c) Andrew Evans, some rights reserved (CC BY-NC)

2024-12-20
Hawaii, US
(c) Kevin Faccenda, some rights reserved (CC BY)
Observations and photos from iNaturalist, shown only when openly licensed.
Cite this specimen
Hymenasplenium unilaterale. BISH 453419. Bernice Pauahi Bishop Museum, Honolulu. GBIF occurrence 5956562807. Accessed via explore.bishopmuseum.org/specimens/bish/453419.
Record sources
- GBIF occurrence 5956562807 ↗
- Data license: CC_BY_NC_4_0
- Last harvested October 26, 2026
