Bernice Puahi Bishop Museum · CC BY-NC · GBIF · full resolution
Polysiphonia nigrescens
As recorded: Polysiphonia nigrescens Hudson
Plantae › Rhodophyta › Florideophyceae › Ceramiales › Rhodomelaceae
- Collected by
- Rieger, C.
- Collector number
- s.n.
- Date
- August 11, 1949
- Locality
- Great Harbor, Woods Hole
- Region
- Massachusetts, United States
- Record type
- Preserved specimen
Polysiphonia nigrescens observed alive
This specimen was collected in 1949. Since 2000, iNaturalist observers have recorded 9 research-grade sightings in the wild, most recently on 2025-12-03.
2025-12-03
Jersey City, NJ, US
(c) sarcasticsnail, some rights reserved (CC BY-NC)
2025-09-30
Brooklyn Bridge Park - Pier 5, New York, NY, US
(c) Uri Sarig, some rights reserved (CC BY-NC)
2023-06-11
Westport, MA, USA
(c) Seung-hwan Leo Kim, some rights reserved (CC BY-NC)
2023-05-23
Grindstone Point, Winter Harbor, ME, USA
(c) Roger Rittmaster, some rights reserved (CC BY)
2022-08-19
Wallis Sands State Beach, Portsmouth, NH, US
no rights reserved
2020-06-03
Ards, Northern Ireland, United Kingdom
(c) Bernard Picton, some rights reserved (CC BY)
Observations and photos from iNaturalist, shown only when openly licensed.
Cite this specimen
Polysiphonia nigrescens. BISH 538694. Bernice Pauahi Bishop Museum, Honolulu. GBIF occurrence 5956418070. Accessed via explore.bishopmuseum.org/specimens/bish/538694.
Record sources
- GBIF occurrence 5956418070 ↗
- Data license: CC_BY_NC_4_0
- Last harvested October 26, 2026