Ageratina adenophora
Crofton Weed
As recorded: Ageratina adenophora (Spreng.) R.M.King & H.Rob.
Plantae › Tracheophyta › Magnoliopsida › Asterales › Asteraceae
- Collected by
- Swezey, O.H.
- Collector number
- s.n.
- Date
- April 7, 1921
- Locality
- E Oahu, Mauna Lua Ranch
- Island
- Oʻahu
- Region
- Hawaii, United States
- Identified by
- Herbst, D.R.; Sohmer, S.H.; Wagner, W.L.Derral R. Herbst →Seymour H. Sohmer →Warren L. Wagner Jr. →
- Record type
- Preserved specimen
Ageratina adenophora observed alive in Hawaiʻi
This specimen was collected in 1921. Since 2000, iNaturalist observers have recorded 112 research-grade sightings in the wild, most recently on 2026-10-26.
2026-10-26
Haleakalā National Park, Kula, HI, US
(c) ka_y_ak, some rights reserved (CC BY-NC)
2026-08-07
Hawaii, US
(c) Daniel Ward, some rights reserved (CC BY-NC)
2026-04-20
Sliding Sands Trail, Kula, HI, US
(c) annathn, some rights reserved (CC BY-NC)
2026-04-09
Kula, HI 96790, USA
(c) Mike Burnett, some rights reserved (CC BY)
2026-03-25
Maui County, HI, USA
(c) Daniel Ward, some rights reserved (CC BY-NC)
2026-03-12
Haleakalā National Park, Kula, HI, US
(c) lkfreidenburg, some rights reserved (CC BY-NC)
Observations and photos from iNaturalist, shown only when openly licensed.
Cite this specimen
Ageratina adenophora. BISH 75218. Bernice Pauahi Bishop Museum, Honolulu. GBIF occurrence 5956348977. Accessed via explore.bishopmuseum.org/specimens/bish/75218.
Record sources
- GBIF occurrence 5956348977 ↗
- Data license: CC_BY_NC_4_0
- Last harvested October 26, 2026