naturalizedEuphorbiaceae
Ricinus communis
castor bean
Naturalized (non-native)non-native
Introduced and now reproducing on its own in the wild.
Ricinus communis, the castor bean or castor-oil-plant, is a species of perennial flowering plant in the spurge family, Euphorbiaceae. It is the sole species in the monotypic genus, Ricinus, and subtribe, Ricininae. The evolution of castor and its relation to other species are currently being studied using modern genetic tools. It reproduces with a mixed pollination system which favors selfing by geitonogamy but at the same time can be an out-crosser by anemophily (wind pollination) or...
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Seasonality
12 flowering · 20 fruiting annotations · iNaturalist · fetched Jul 2026
■ flowering (peak March)■ fruiting (peak March)
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 · 8 · iNaturalist
open-licensed photos · click any to view its source
Where documented · 116 ahupuaʻa
documented occurrences · iNaturalist + GBIF · iNaturalist 195 · GBIF 291 records
Waikīkī · OʻahuiNat 22 · GBIF 30 ✓
Honouliuli · OʻahuiNat 16 · GBIF 24 ✓
Waimea · KauaʻiiNat 10 · GBIF 21 ✓
Honolua · MauiiNat 7 · GBIF 9 ✓
Makanikahio 1-2, Auau · HawaiʻiiNat 4 · GBIF 12 ✓
Kōloa · KauaʻiiNat 7 · GBIF 6 ✓
Wailua · KauaʻiiNat 3 · GBIF 9 ✓
Waiʻanae · OʻahuiNat 5 · GBIF 6 ✓
Kailua · OʻahuiNat 3 · GBIF 6 ✓
Waiawa · OʻahuiNat 4 · GBIF 4 ✓
Honolulu · OʻahuiNat 3 · GBIF 5 ✓
Paʻalaʻa · OʻahuiNat 4 · GBIF 4 ✓
Puʻukapu · HawaiʻiiNat 2 · GBIF 5 ✓
Maunalua · OʻahuiNat 3 · GBIF 4 ✓
Kamaʻole · MauiiNat 4 · GBIF 3 ✓
Kapaʻa · KauaʻiiNat 3 · GBIF 4 ✓
Pūlehunui · MauiiNat 3 · GBIF 4 ✓
Kēōkea · HawaiʻiiNat 4 · GBIF 2 ✓
Kāneʻohe · OʻahuiNat 3 · GBIF 3 ✓
Makapala, Niuliʻi · HawaiʻiiNat 3 · GBIF 3 ✓
Kalihi · OʻahuiNat 3 · GBIF 3 ✓
Kalaoa 1-5 · HawaiʻiiNat 2 · GBIF 3 ✓
Lanihau 1-2, Moeauo · HawaiʻiiNat 3 · GBIF 2 ✓
Lālāmilo, Keanuʻiʻomanō · HawaiʻiiNat 2 · GBIF 3 ✓
Paeahu · MauiiNat 1 · GBIF 4 ✓
Hakipuʻu · OʻahuiNat 2 · GBIF 2 ✓
Makaweli · KauaʻiiNat 2 · GBIF 2 ✓
Kahaluʻu · HawaiʻiiNat 1 · GBIF 3 ✓
ʻŌmaʻopio · MauiiNat 2 · GBIF 2 ✓
Puʻukawaiwai, Panoluʻukia · HawaiʻiiNat 1 · GBIF 3 ✓
Kalihikai · KauaʻiiNat 2 · GBIF 2 ✓
Waiohuli · MauiiNat 3 · GBIF 1 ✓
Keālia · KauaʻiiNat 2 · GBIF 2 ✓
Wailuku · MauiiNat 1 · GBIF 3 ✓
Moanalua · OʻahuiNat 2 · GBIF 2 ✓
Makawao · MauiiNat 2 · GBIF 2 ✓
Puaʻa 2-3, Waiʻaha 1 · HawaiʻiiNat 1 · GBIF 3 ✓
Waimānalo · OʻahuGBIF 4
Kaʻonoʻulu · MauiiNat 3
ʻŌiʻo 2 · OʻahuiNat 1 · GBIF 2 ✓
Puʻuwaʻawaʻa · HawaiʻiiNat 1 · GBIF 2 ✓
Honokōhau · MauiiNat 1 · GBIF 2 ✓
Kawela · OʻahuiNat 1 · GBIF 2 ✓
Kalauao · OʻahuiNat 1 · GBIF 2 ✓
Hanalei · KauaʻiiNat 2 · GBIF 1 ✓
Kalāheo · KauaʻiiNat 2 · GBIF 1 ✓
Waikahekahenui · HawaiʻiiNat 2 · GBIF 1 ✓
Puʻuanahulu · HawaiʻiGBIF 3
Waipiʻo · OʻahuGBIF 3
Kawaihae 2 · HawaiʻiiNat 1 · GBIF 1 ✓
Hāʻena · KauaʻiiNat 1 · GBIF 1 ✓
Wailau, Nīnole, Kaʻa · HawaiʻiiNat 1 · GBIF 1 ✓
Pāpā 2 · HawaiʻiiNat 1 · GBIF 1 ✓
Kaʻena · OʻahuiNat 1 · GBIF 1 ✓
Anahola · KauaʻiiNat 1 · GBIF 1 ✓
Waikele · OʻahuiNat 1 · GBIF 1 ✓
Nāpili 2-3 · MauiiNat 1 · GBIF 1 ✓
Kaumalumalu, Pāhoehoe · HawaiʻiiNat 1 · GBIF 1 ✓
Paunau · MauiiNat 1 · GBIF 1 ✓
Māhāʻulepū · KauaʻiiNat 1 · GBIF 1 ✓
Honokahua · MauiiNat 1 · GBIF 1 ✓
Waiheʻe · MauiiNat 1 · GBIF 1 ✓
South Olohena · KauaʻiiNat 1 · GBIF 1 ✓
Waipiʻo · HawaiʻiiNat 1 · GBIF 1 ✓
Keālia · OʻahuiNat 1 · GBIF 1 ✓
Moaliʻi · MauiiNat 1 · GBIF 1 ✓
Kāwala · HawaiʻiiNat 1 · GBIF 1 ✓
Keaʻau · HawaiʻiiNat 1 · GBIF 1 ✓
Malaekahana · OʻahuiNat 1 · GBIF 1 ✓
Kealahewa · HawaiʻiiNat 1 · GBIF 1 ✓
Kawailoa · OʻahuiNat 2
Hanakaʻoe · OʻahuiNat 1 · GBIF 1 ✓
Waiākea · HawaiʻiiNat 1 · GBIF 1 ✓
ʻŌuli · HawaiʻiiNat 1 · GBIF 1 ✓
Kaluako‘i · MolokaʻiiNat 1 · GBIF 1 ✓
Pāʻā · KauaʻiGBIF 2
Hālawa · OʻahuGBIF 2
Hōʻaeʻae · OʻahuGBIF 2
Mokulēʻia 2 · OʻahuiNat 1
Kalapakī · KauaʻiiNat 1
Hōlualoa 4 · HawaiʻiiNat 1
Olowalu · MauiiNat 1
Keana · OʻahuiNat 1
Waiheʻe · OʻahuiNat 1
Kamananui · OʻahuiNat 1
Pālāwai · LānaʻiiNat 1
Kaʻāpahu · MauiiNat 1
Mākaha · OʻahuGBIF 1
Kalihi · MauiGBIF 1
Kapuʻa · HawaiʻiGBIF 1
Haʻikū · KauaʻiGBIF 1
Kāhili · KauaʻiGBIF 1
Kahuku · OʻahuGBIF 1
Kauleolī 1-2 · HawaiʻiGBIF 1
Naholoku · MauiGBIF 1
Lāʻiewai · OʻahuGBIF 1
Waiakoa · MauiGBIF 1
Wainiha · KauaʻiGBIF 1
Pūlehuiki · MauiGBIF 1
Kawela · HawaiʻiGBIF 1
Kawaipapa · MauiGBIF 1
Kawaihae 1 · HawaiʻiGBIF 1
Heʻeia · OʻahuGBIF 1
Kalopā · HawaiʻiGBIF 1
Aʻapueo · MauiGBIF 1
Hionamoa · HawaiʻiGBIF 1
Kaueleau · HawaiʻiGBIF 1
Kahuku · HawaiʻiGBIF 1
Kamoku · LānaʻiGBIF 1
Kamehameiki · MauiGBIF 1
Nāwiliwili · KauaʻiGBIF 1