naturalizedAsteraceae
Erigeron sumatrensis
tropical horseweed
Naturalized (non-native)non-native
Introduced and now reproducing on its own in the wild.
Conyza sumatrensis is an annual herb probably native to South America, but widely naturalised in tropical and subtropical regions, and regarded as an invasive weed in many places. In the British Isles it is known as Guernsey fleabane. Other common names include fleabane, tall fleabane, broad-leaved fleabane, white horseweed, and Sumatran fleabane.
Read more on Wikipedia →summary via Wikipedia · CC BY-SA
Seasonality
Only 4 phenology-annotated observations exist for this species in Hawaiʻi — too few to describe a season. No window is inferred.
Gallery · 8 · iNaturalist
open-licensed photos · click any to view its source
Where documented · 78 ahupuaʻa
documented occurrences · iNaturalist + GBIF · iNaturalist 198 · GBIF 141 records
Keauhou · HawaiʻiiNat 38 · GBIF 21 ✓
Waikīkī · OʻahuiNat 29 · GBIF 25 ✓
Waimea · KauaʻiiNat 13 · GBIF 11 ✓
Honolulu · OʻahuiNat 8 · GBIF 5 ✓
Wailuku · MauiiNat 8 · GBIF 4 ✓
Mākaha · OʻahuiNat 4 · GBIF 5 ✓
Waiʻanae · OʻahuiNat 3 · GBIF 6 ✓
Hāʻena · KauaʻiiNat 5 · GBIF 1 ✓
Kahakuloa · MauiiNat 3 · GBIF 3 ✓
Moanalua · OʻahuiNat 3 · GBIF 3 ✓
Kalialinui · MauiiNat 3 · GBIF 2 ✓
Wailua · KauaʻiiNat 2 · GBIF 3 ✓
Papaʻanui · MauiiNat 2 · GBIF 2 ✓
Nāpili 2-3 · MauiiNat 2 · GBIF 2 ✓
Kuliʻouʻou · OʻahuiNat 2 · GBIF 2 ✓
Honuaʻula · HawaiʻiiNat 3 · GBIF 1 ✓
Maunalua · OʻahuiNat 2 · GBIF 2 ✓
Kāneʻohe · OʻahuiNat 2 · GBIF 2 ✓
Waipiʻo · OʻahuiNat 2 · GBIF 2 ✓
Kaʻonoʻulu · MauiiNat 2 · GBIF 1 ✓
Kailua · OʻahuiNat 2 · GBIF 1 ✓
Waimānalo · OʻahuiNat 2 · GBIF 1 ✓
Honouliuli · OʻahuiNat 2 · GBIF 1 ✓
Hālawa · OʻahuiNat 1 · GBIF 2 ✓
Kaʻā · LānaʻiiNat 2 · GBIF 1 ✓
Kawaihāpai · OʻahuiNat 1 · GBIF 2 ✓
Kaʻaʻawa · OʻahuiNat 2 · GBIF 1 ✓
Kamananui · OʻahuiNat 1 · GBIF 2 ✓
Keawaʻula · OʻahuiNat 1 · GBIF 2 ✓
Kamoku · LānaʻiiNat 3
Mokulēʻia 1 · OʻahuiNat 1 · GBIF 1 ✓
Kikahi · OʻahuiNat 1 · GBIF 1 ✓
Nuʻu · MauiiNat 2
Kaʻena · OʻahuiNat 1 · GBIF 1 ✓
Hakipuʻu · OʻahuiNat 1 · GBIF 1 ✓
Haʻikū · KauaʻiiNat 2
Kapāpala · HawaiʻiiNat 2
South Olohena · KauaʻiiNat 1 · GBIF 1 ✓
Kahanahāiki · OʻahuiNat 1 · GBIF 1 ✓
Mailepai · MauiiNat 2
Keana · OʻahuiNat 1 · GBIF 1 ✓
Paeahu · MauiiNat 1 · GBIF 1 ✓
Kapaʻa · KauaʻiiNat 2
Pūehuehunui · MauiiNat 2
Hanalei · KauaʻiiNat 1 · GBIF 1 ✓
Mahana · LānaʻiiNat 1 · GBIF 1 ✓
Kahuku · HawaiʻiiNat 1 · GBIF 1 ✓
Makawao · MauiiNat 1 · GBIF 1 ✓
Honopū · KauaʻiiNat 1 · GBIF 1 ✓
Kaunolū · LānaʻiGBIF 2
Kahuwai · HawaiʻiGBIF 2
Honomakaʻu · HawaiʻiiNat 1
ʻAlaenui · MauiiNat 1
Kalaoa 1-5 · HawaiʻiiNat 1
Kaʻohe Mauka · HawaiʻiiNat 1
Waiawa · OʻahuiNat 1
Kōloa · KauaʻiiNat 1
Hanakaʻōʻō · MauiiNat 1
Waiohuli · MauiiNat 1
Kalulu · LānaʻiiNat 1
Makaʻehu · MauiiNat 1
Kalauao · OʻahuiNat 1
Waiheʻe · OʻahuiNat 1
Kawailoa · OʻahuiNat 1
ʻŌlaʻa · HawaiʻiiNat 1
Honokōwai · MauiiNat 1
Kahaluʻu · OʻahuiNat 1
Honokōhau 1-3 · HawaiʻiGBIF 1
Honolua · MauiGBIF 1
Hauʻula · OʻahuGBIF 1
Keāliaaupuni · LānaʻiGBIF 1
Kaʻūpūlehu · HawaiʻiGBIF 1
Paomai · LānaʻiGBIF 1
ʻAlae 1-2 · MauiGBIF 1
Paʻalaʻa · OʻahuGBIF 1