Ceratophyllum demersum
Common Hornwort
Photo: (c) chiuluan, some rights reserved (CC BY), uploaded by chiuluan (iNaturalist)
23
Bishop specimens
0
Type specimens
1911
First collected
2014
Last collected
2025
Last seen alive in Hawaiʻi
In the Library
Bishop Museum publications whose pages name Ceratophyllum demersum, most mentions first.
2025
Imada, C.T., Faccenda, K., Thomas, M.K., Gallaher, T., Oppenhemier, H., Kennedy, B. & Kalei, A. (eds.) Hawaiian native & naturalized vascular plants checklist (2025 update). 780 pp. [published online 6 November 2025]· Contribution to the Hawaii Biological Survey · 1 page
2019
Hawaiian naturalized vascular plants checklist (February 2019 update)Imada, C. · Contribution to the Hawaii Biological Survey · 1 page
2013
Records of the Hawaii Biological Survey for 1994–2013: IndexEvenhuis, N.L. & Eldredge, L.G. (eds) · Records of the Hawaii Biological Survey · 1 page
2002
Records of the Hawaii Biological Survey for 2000. Part 2: notesEvenhuis, N.L. & Eldredge, L.G. · Contribution to the Hawaii Biological Survey · 1 page
2002
Index to the Records of the Hawaii Biological Survey for the years 1994 through 2000Evenhuis, N.L. · Contribution to the Hawaii Biological Survey · 1 page
2001
Records of the Hawaii Biological Survey for 2001: -02: ArticlesEvenhuis, N.L. & Eldredge, L.G. (eds) · Records of the Hawaii Biological Survey · 1 page
2000
New Hawaiian plant records for 2000Staples G.W., C.T. Imada & D.R. Herbst · Contribution to the Hawaii Biological Survey · 1 page
2000
Records of the Hawaii Biological Survey for 1994–2000: IndexEvenhuis, N.L. & Eldredge, L.G. (eds) · Records of the Hawaii Biological Survey · 1 page
Where Bishop collected it
6 mapped specimens. Localities of endangered species are shown approximately.
Two centuries of collecting
The oldest Bishop specimen was collected in 1911 by McGregor, R.C. (Guam).
From the collection
Alive today
6 research-grade iNaturalist sightings in the wild in Hawaiʻi since 2000. Most recent first.
2025-12-25
Honolulu, Hawaii, United States
(c) Tony Iwane, some rights reserved (CC BY-NC)
2022-01-23
Honolulu County, HI, USA
(c) Dean Walton, some rights reserved (CC BY-NC)
2022-01-03
Lokowaka Pond, Hilo, HI, US
(c) Matthew Thompson, some rights reserved (CC BY-NC)
2022-01-03
Island of Hawaiʻi, Hilo, HI, US
(c) Matthew Thompson, some rights reserved (CC BY-NC)
2021-11-26
Hawaii County, US-HI, US
(c) johnbotany, some rights reserved (CC BY-NC)
2021-07-10
Hawaii, US
(c) Steven Kurniawidjaja, some rights reserved (CC BY-NC)