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Ageratina adenophora

Bernice Puahi Bishop Museum · CC BY-NC · GBIF · full resolution

BISH 75195Botany

Ageratina adenophora

Crofton Weed

As recorded: Ageratina adenophora (Spreng.) R.M.King & H.Rob.

Plantae › Tracheophyta › Magnoliopsida › Asterales › Asteraceae

Collected by: Forbes, C.N.
Collector number: 789.M
Date: July 16, 1919
Locality: Crater of Haleakala Trail into crater
Island: Maui
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

56 Bishop specimens of Ageratina adenophora · collected 1909–2023Species page ›

Ageratina adenophora observed alive in Hawaiʻi

This specimen was collected in 1919. Since 2000, iNaturalist observers have recorded 111 research-grade sightings in the wild, most recently on 2026-08-07.

Ageratina adenophora observed 2026-08-07

2026-08-07

Hawaii, US

(c) Daniel Ward, some rights reserved (CC BY-NC)

Ageratina adenophora observed 2026-04-20

2026-04-20

Sliding Sands Trail, Kula, HI, US

(c) annathn, some rights reserved (CC BY-NC)

Ageratina adenophora observed 2026-04-09

2026-04-09

Kula, HI 96790, USA

(c) Mike Burnett, some rights reserved (CC BY)

Ageratina adenophora observed 2026-03-25

2026-03-25

Maui County, HI, USA

(c) Daniel Ward, some rights reserved (CC BY-NC)

Ageratina adenophora observed 2026-03-12

2026-03-12

Haleakalā National Park, Kula, HI, US

(c) lkfreidenburg, some rights reserved (CC BY-NC)

Ageratina adenophora observed 2026-03-03

2026-03-03

Kula, HI 96790, USA

(c) Tyler Mode, some rights reserved (CC BY-NC)

Observations and photos from iNaturalist, shown only when openly licensed.

Cite this specimen

Ageratina adenophora. BISH 75195. Bernice Pauahi Bishop Museum, Honolulu. GBIF occurrence 5956608188. Accessed via explore.bishopmuseum.org/specimens/bish/75195.

Record sources

GBIF occurrence 5956608188 ↗
Data license: CC_BY_NC_4_0
Last harvested October 26, 2026