naturalizedAsteraceae
Ageratum conyzoides
billygoat weed
Naturalized (non-native)non-native
Introduced and now reproducing on its own in the wild.
Ageratum conyzoides (billygoat-weed, chick weed, goatweed, whiteweed) is native to Tropical America, especially Brazil, and considered an invasive weed in many other regions. It is an herb that is 0.5–1 m. high, with ovate leaves 2–6 cm long, and flowers are white to mauve.
Read more on Wikipedia →summary via Wikipedia · CC BY-SA
Seasonality
51 flowering · 2 fruiting annotations · iNaturalist · fetched Jul 2026
■ flowering (peak March)■ fruiting (peak February)
This is an inference, not a schedule. The curve reflects when observers annotated flowering and fruiting — which tracks observer effort as well as plant behavior, and pools all elevations and islands into one signal. Hawaiʻi’s microclimates vary enormously; a species may fruit in January at sea level and June at elevation. Use this to know when to look, then look.
Gallery · 4 · iNaturalist
open-licensed photos · click any to view its source
Where documented · 125 ahupuaʻa
documented occurrences · iNaturalist + GBIF · iNaturalist 200 · GBIF 288 records
Waikīkī · OʻahuiNat 22 · GBIF 55 ✓
Honolulu · OʻahuiNat 22 · GBIF 14 ✓
Wailua · KauaʻiiNat 6 · GBIF 9 ✓
Keauhou · HawaiʻiiNat 8 · GBIF 5 ✓
Piʻihonua · HawaiʻiiNat 2 · GBIF 10 ✓
Honuaʻula · HawaiʻiiNat 4 · GBIF 7 ✓
Waiākea · HawaiʻiiNat 3 · GBIF 8 ✓
Keaʻau · HawaiʻiiNat 2 · GBIF 8 ✓
Puʻuwaʻawaʻa · HawaiʻiiNat 4 · GBIF 5 ✓
Honouliuli · OʻahuiNat 4 · GBIF 5 ✓
Kailua · OʻahuiNat 2 · GBIF 6 ✓
Waiʻanae · OʻahuiNat 3 · GBIF 5 ✓
Kāneʻohe · OʻahuiNat 2 · GBIF 6 ✓
Hāʻena · KauaʻiiNat 4 · GBIF 3 ✓
Waimea · KauaʻiiNat 3 · GBIF 4 ✓
Honokahua · MauiiNat 4 · GBIF 3 ✓
Maunalua · OʻahuiNat 4 · GBIF 3 ✓
Puʻuʻeo · HawaiʻiiNat 3 · GBIF 4 ✓
Kaloko · HawaiʻiiNat 4 · GBIF 3 ✓
Koʻolau · MauiiNat 4 · GBIF 3 ✓
Kalaoa 1-5 · HawaiʻiiNat 4 · GBIF 2 ✓
Hālawa · OʻahuiNat 2 · GBIF 4 ✓
Heʻeia · OʻahuiNat 3 · GBIF 3 ✓
Kalopā · HawaiʻiiNat 2 · GBIF 4 ✓
Kīlauea · KauaʻiiNat 3 · GBIF 3 ✓
Kapoho · HawaiʻiiNat 2 · GBIF 3 ✓
Kapaʻa · KauaʻiiNat 4 · GBIF 1 ✓
ʻAiea · OʻahuiNat 3 · GBIF 2 ✓
Kuliʻouʻou · OʻahuiNat 2 · GBIF 2 ✓
Keʻekeʻe 1-2, Kanakau · HawaiʻiiNat 2 · GBIF 2 ✓
Lanihau 1-2, Moeauo · HawaiʻiiNat 2 · GBIF 2 ✓
Keaʻau · OʻahuiNat 2 · GBIF 2 ✓
Kalihikai · KauaʻiiNat 3 · GBIF 1 ✓
Waimea, Waikoloa · HawaiʻiiNat 2 · GBIF 2 ✓
Hōnaunau · HawaiʻiiNat 1 · GBIF 3 ✓
Waiohuli · MauiiNat 3 · GBIF 1 ✓
Kamananui · OʻahuiNat 1 · GBIF 3 ✓
Hanalei · KauaʻiiNat 2 · GBIF 2 ✓
Paʻalaʻa · OʻahuiNat 1 · GBIF 3 ✓
Kaʻena · OʻahuiNat 1 · GBIF 2 ✓
Waipiʻo · HawaiʻiiNat 1 · GBIF 2 ✓
East Makaīwa · MauiiNat 2 · GBIF 1 ✓
Kula · HawaiʻiiNat 1 · GBIF 2 ✓
Kalauao · OʻahuiNat 2 · GBIF 1 ✓
Wailuku · MauiiNat 2 · GBIF 1 ✓
Paumalū · OʻahuiNat 1 · GBIF 2 ✓
ʻAlaenui · MauiiNat 1 · GBIF 1 ✓
Kalihi · MauiiNat 1 · GBIF 1 ✓
Haʻikū · KauaʻiiNat 2
Punahoa 2 · HawaiʻiiNat 2
Kiolakaʻa, Puʻumakaʻā · HawaiʻiiNat 1 · GBIF 1 ✓
Kahakuloa · MauiiNat 1 · GBIF 1 ✓
Honolua · MauiiNat 1 · GBIF 1 ✓
Waiawa · OʻahuiNat 1 · GBIF 1 ✓
Honopou · MauiiNat 1 · GBIF 1 ✓
Aukuʻu · OʻahuiNat 1 · GBIF 1 ✓
Honopueo · HawaiʻiiNat 1 · GBIF 1 ✓
Keālia · KauaʻiiNat 1 · GBIF 1 ✓
Honalo, Māʻihi 1-2 · HawaiʻiiNat 1 · GBIF 1 ✓
Keawaʻula · OʻahuiNat 1 · GBIF 1 ✓
Kamoku · LānaʻiiNat 1 · GBIF 1 ✓
Kalihi · OʻahuiNat 1 · GBIF 1 ✓
Kahaluʻu · OʻahuiNat 1 · GBIF 1 ✓
Keʻei 2 · HawaiʻiiNat 1 · GBIF 1 ✓
Puaʻa 2-3, Waiʻaha 1 · HawaiʻiiNat 1 · GBIF 1 ✓
Mohopilo · MauiGBIF 2
Honomū, Kuhua · HawaiʻiGBIF 2
Moanalua · OʻahuGBIF 2
Kahana · OʻahuGBIF 2
Waiheʻe · MauiiNat 1
Wailuanui · MauiiNat 1
West Makaīwa · MauiiNat 1
Hanakaʻōʻō · MauiiNat 1
ʻŌiʻo 1 · OʻahuiNat 1
Manukā · HawaiʻiiNat 1
Kalihiwai · KauaʻiiNat 1
ʻĀpua · HawaiʻiiNat 1
Waiʻoli · KauaʻiiNat 1
Kamaʻeʻe · HawaiʻiiNat 1
N/A · KahoʻolaweiNat 1
Kahuku · HawaiʻiiNat 1
Kaimū · HawaiʻiiNat 1
Honopū · KauaʻiiNat 1
Waikahekaheiki · HawaiʻiGBIF 1
Puumoi · HawaiʻiGBIF 1
Waikele · OʻahuGBIF 1
Ponahawai · HawaiʻiGBIF 1
Mokulēʻia 2 · OʻahuGBIF 1
Hanapēpē · KauaʻiGBIF 1
Hakipuʻu · OʻahuGBIF 1
Kau · HawaiʻiGBIF 1
Mākua · OʻahuGBIF 1
Maunalei · LānaʻiGBIF 1
Makaweli · KauaʻiGBIF 1
Kāhili · KauaʻiGBIF 1
Keahialaka · HawaiʻiGBIF 1
South Olohena · KauaʻiGBIF 1
Kamaʻole · MauiGBIF 1
Waimānalo · OʻahuGBIF 1
Kēōkea · MauiGBIF 1
Kaʻohe 1-3 · HawaiʻiGBIF 1
Keʻanae · MauiGBIF 1
Kōloa · KauaʻiGBIF 1
Keonepokonui · HawaiʻiGBIF 1
Moloaʻa · KauaʻiGBIF 1
Kaʻūpūlehu · HawaiʻiGBIF 1
Paeahu · MauiGBIF 1
Kalamaʻula · MolokaʻiGBIF 1
Wailuaiki · MauiGBIF 1
Kahaliʻi · HawaiʻiGBIF 1
Waiheʻe · OʻahuGBIF 1
Waipake · KauaʻiGBIF 1
Puʻuanahulu · HawaiʻiGBIF 1
West Honomāʻele · MauiGBIF 1
Waipouli · KauaʻiGBIF 1
Hālawa · MolokaʻiGBIF 1
Nānākuli · OʻahuGBIF 1
Showing the 120 most-documented of 125.