Ageratina adenophora
Crofton Weed
As recorded: Ageratina adenophora (Spreng.) R.M.King & H.Rob.
Plantae › Tracheophyta › Magnoliopsida › Asterales › Asteraceae
- Collected by
- Fosberg, F.R.; Storey, W.B.; Oliveira, V.M.F. Raymond Fosberg →V.M. Oliveira →W.B. Storey →
- Collector number
- 10786
- Date
- January 23, 1935
- Locality
- Koolau Mts, Kailua E base of Puu Konahuanui, Maunawili
- Island
- Oʻahu
- Region
- Hawaii, United States
- Coordinates
- 21.3504, -157.7841 ± 374 m
- Elevation
- 320 m
- 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
Where it was collected
Collected the same day
On January 23, 1935, Fosberg, F.R.; Storey, W.B.; Oliveira, V.M. also collected 8 other specimens.
Still here: Ageratina adenophora observed near this locality
This specimen was collected in 1935. Since 2000, iNaturalist observers have recorded 22 research-grade sightings in the wild within 25 km, most recently on 2026-08-07.
2026-08-07
Hawaii, US
(c) Daniel Ward, some rights reserved (CC BY-NC)
2026-03-02
Honolulu Watershed Forest Reserve, East Honolulu, HI, US
(c) Daniel Ward, some rights reserved (CC BY-NC)
2025-01-24
Kuliouou - Kalani Iki, Honolulu, HI, USA
(c) Kevin Faccenda, some rights reserved (CC BY)
2024-12-20
Palolo, Honolulu, HI, USA
(c) Kevin Faccenda, some rights reserved (CC BY)
2024-12-14
Oʻahu, Honolulu, HI, US
(c) Tara Severns, some rights reserved (CC BY)
2024-11-29
Maunawili, HI 96734, USA
(c) Kevin Faccenda, some rights reserved (CC BY)
Observations and photos from iNaturalist, shown only when openly licensed.
Cite this specimen
Ageratina adenophora. BISH 75223. Bernice Pauahi Bishop Museum, Honolulu. GBIF occurrence 5956671541. Accessed via explore.bishopmuseum.org/specimens/bish/75223.
Record sources
- GBIF occurrence 5956671541 ↗
- Data license: CC_BY_NC_4_0
- Last harvested October 26, 2026