Gossypium tomentosum
endemicMalvaceae

Gossypium tomentosum

Ma'o

Endemic to Hawaiʻinative

Found naturally nowhere else on Earth.

Gossypium tomentosum, commonly known as Maʻo or Hawaiian cotton, is a species of cotton plant that is endemic to the Hawaiian Islands. It inhabits low shrublands at elevations from sea level to 120 m (390 ft). Maʻo is a shrub that reaches a height of 1.5–5 ft (0.46–1.52 m) and a diameter of 5–10 ft (1.5–3.0 m). The seed hairs (lint) are short and reddish brown, unsuitable for spinning or twisting into thread.

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Seasonality
39 flowering · 8 fruiting annotations · iNaturalist · fetched Jul 2026
JFMAMJJASONDpeak
■ flowering (peak December)■ fruiting (peak December)

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 · 51 ahupuaʻa
documented occurrences · iNaturalist + GBIF · iNaturalist 79 · GBIF 118 records
Waimea · KauaʻiiNat 16 · GBIF 19 ✓
Waikīkī · OʻahuiNat 5 · GBIF 10 ✓
Kailua · OʻahuiNat 7 · GBIF 8 ✓
Mākaha · OʻahuiNat 4 · GBIF 3 ✓
Maunalua · OʻahuiNat 3 · GBIF 4 ✓
Pūlehunui · MauiiNat 4 · GBIF 3 ✓
Wailuku · MauiiNat 1 · GBIF 6 ✓
Haʻikū · KauaʻiiNat 2 · GBIF 3 ✓
Ukumehame · MauiiNat 2 · GBIF 3 ✓
Kamaʻole · MauiiNat 1 · GBIF 4 ✓
Waikapū · MauiiNat 2 · GBIF 3 ✓
Kōloa · KauaʻiiNat 2 · GBIF 2 ✓
Waiʻanae · OʻahuiNat 1 · GBIF 3 ✓
Kāneʻohe · OʻahuiNat 3 · GBIF 1 ✓
Moanalua · OʻahuiNat 3 · GBIF 1 ✓
Kamananui · OʻahuiNat 2 · GBIF 2 ✓
Waimānalo · OʻahuiNat 1 · GBIF 2 ✓
Kēōkea · MauiiNat 2 · GBIF 1 ✓
Paeahu · MauiiNat 2 · GBIF 1 ✓
Honopū · KauaʻiiNat 1 · GBIF 2 ✓
Wahikuli · MauiiNat 1 · GBIF 1 ✓
Palauea · MauiiNat 1 · GBIF 1 ✓
Kahakuloa · MauiiNat 1 · GBIF 1 ✓
Waiheʻe · MauiiNat 1 · GBIF 1 ✓
Waiakoa · MauiiNat 1 · GBIF 1 ✓
Hanakoa · KauaʻiiNat 1 · GBIF 1 ✓
Keāliaaupuni · LānaʻiiNat 1 · GBIF 1 ✓
Hanakaʻōʻō · MauiiNat 1 · GBIF 1 ✓
Waiohuli · MauiiNat 1 · GBIF 1 ✓
Polanui · MauiiNat 1 · GBIF 1 ✓
Kalalau · KauaʻiiNat 1 · GBIF 1 ✓