Macroptilium atropurpureum
naturalizedFabaceae

Macroptilium atropurpureum

Purple Bush-Bean

Naturalized (non-native)non-native

Introduced and now reproducing on its own in the wild.

Macroptilium atropurpureum, commonly referred to as purple bush-bean, or siratro is a perennial legume recognized by its climbing dense green vines and deep purple flowers. The plant is indigenous to the tropical and subtropical regions of North, Central and South America, as far north as Texas in the USA and as far south as Peru and Brazil, but it can be found in many tropical regions around the world. Rich in protein, Macroptilium atropurpureum is commonly...

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Seasonality
31 flowering · 9 fruiting annotations · iNaturalist · fetched Jul 2026
JFMAMJJASONDpeak
■ flowering (peak November)■ fruiting (peak September)

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 · 10 · iNaturalist
open-licensed photos · click any to view its source
Where documented · 104 ahupuaʻa
documented occurrences · iNaturalist + GBIF · iNaturalist 192 · GBIF 285 records
Kailua · OʻahuiNat 20 · GBIF 31 ✓
Waikīkī · OʻahuiNat 13 · GBIF 16 ✓
Pānauinui · HawaiʻiiNat 9 · GBIF 12 ✓
Maunalua · OʻahuiNat 10 · GBIF 10 ✓
Kahuku · HawaiʻiiNat 5 · GBIF 13 ✓
Wailuku · MauiiNat 4 · GBIF 11 ✓
Honouliuli · OʻahuiNat 3 · GBIF 11 ✓
ʻAlaeiki · MauiiNat 7 · GBIF 4 ✓
Kalapakī · KauaʻiiNat 4 · GBIF 6 ✓
Waimea · KauaʻiiNat 4 · GBIF 5 ✓
Punaluʻu · HawaiʻiiNat 5 · GBIF 4 ✓
Kahuku · OʻahuiNat 2 · GBIF 6 ✓
Waimānalo · OʻahuiNat 1 · GBIF 7 ✓
Waimea, Waikoloa · HawaiʻiiNat 3 · GBIF 5 ✓
Waipiʻo · OʻahuiNat 4 · GBIF 4 ✓
Nāwiliwili · KauaʻiiNat 2 · GBIF 6 ✓
Kāneʻohe · OʻahuiNat 4 · GBIF 3 ✓
Waiākea · HawaiʻiiNat 4 · GBIF 3 ✓
Pāʻā · KauaʻiiNat 3 · GBIF 3 ✓
Anahola · KauaʻiiNat 3 · GBIF 3 ✓
Hālawa · OʻahuiNat 3 · GBIF 3 ✓
Kaʻena · OʻahuiNat 3 · GBIF 2 ✓
Weliweli · KauaʻiiNat 1 · GBIF 4 ✓
Palauea · MauiiNat 3 · GBIF 2 ✓
Waiheʻe · MauiiNat 2 · GBIF 3 ✓
Honokōwai · MauiiNat 2 · GBIF 3 ✓
Paunau · MauiiNat 2 · GBIF 2 ✓
Kamaʻole · MauiiNat 1 · GBIF 3 ✓
Kōloa · KauaʻiiNat 1 · GBIF 3 ✓
Olowalu · MauiiNat 1 · GBIF 3 ✓
Paeahu · MauiiNat 1 · GBIF 3 ✓
Wailua · KauaʻiiNat 2 · GBIF 2 ✓
Moanalua · OʻahuiNat 2 · GBIF 2 ✓
Nāpili 2-3 · MauiiNat 1 · GBIF 2 ✓
Māhāʻulepū · KauaʻiiNat 1 · GBIF 2 ✓
Waiau · OʻahuiNat 1 · GBIF 2 ✓
Waiawa · OʻahuiNat 1 · GBIF 2 ✓
Waiʻanae · OʻahuiNat 1 · GBIF 2 ✓
Kanahena · MauiiNat 1 · GBIF 2 ✓
Kamananui · OʻahuiNat 1 · GBIF 2 ✓
Nānākuli · OʻahuiNat 1 · GBIF 2 ✓
Paʻalaʻa · OʻahuiNat 1 · GBIF 2 ✓
Kalihi · OʻahuiNat 1 · GBIF 2 ✓
Kawaihae 2 · HawaiʻiiNat 1 · GBIF 1 ✓
Haʻikū · KauaʻiiNat 1 · GBIF 1 ✓
Honolua · MauiiNat 1 · GBIF 1 ✓
Mohopilo · MauiiNat 1 · GBIF 1 ✓
Lāʻiewai · OʻahuiNat 1 · GBIF 1 ✓
Paʻalaea · HawaiʻiiNat 1 · GBIF 1 ✓
Keʻanae · MauiiNat 1 · GBIF 1 ✓
Kāwala · HawaiʻiiNat 1 · GBIF 1 ✓
Kohanaiki · HawaiʻiiNat 1 · GBIF 1 ✓
Honomanü · MauiiNat 1 · GBIF 1 ✓
Kapaʻa · KauaʻiiNat 1 · GBIF 1 ✓
Kealakomo · HawaiʻiiNat 1 · GBIF 1 ✓
Mahana · LānaʻiiNat 1 · GBIF 1 ✓