naturalizedUlvaceae
Ulva intestinalis
Gutweed
Naturalized (non-native)non-native
Introduced and now reproducing on its own in the wild.
Ulva intestinalis, formerly referred to as Enteromorpha intestinalis (Linnaeus) Nees, is a green alga in the division Chlorophyta, of the genus Ulva (sea lettuce), also known by the common names gutweed and grass kelp. Until they were reclassified by genetic work completed in the early 2000s, the tubular members of the genus Ulva were in the genus Enteromorpha.
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Seasonality
Only 0 phenology-annotated observations exist for this species in Hawaiʻi — too few to describe a season. No window is inferred.
Gallery · 10 · iNaturalist
open-licensed photos · click any to view its source
Where documented · 43 ahupuaʻa
documented occurrences · iNaturalist + GBIF · iNaturalist 45 · GBIF 61 records
Waikīkī · OʻahuiNat 2 · GBIF 10 ✓
Honouliuli · OʻahuiNat 1 · GBIF 6 ✓
Wailuku · MauiiNat 4 · GBIF 3 ✓
Honolulu · OʻahuGBIF 7
Waiākea · HawaiʻiGBIF 7
Mohopilo · MauiiNat 4
Kamaʻole · MauiiNat 4
Paeahu · MauiiNat 4
Paunau · MauiGBIF 4
Punaluʻu · HawaiʻiiNat 2
Papaʻanui · MauiiNat 2
Kēōkea · MauiiNat 2
Hanakaʻōʻō · MauiiNat 2
ʻŌiʻo 1 · OʻahuiNat 1 · GBIF 1 ✓
Lauhulu · OʻahuiNat 1 · GBIF 1 ✓
Kahanui · MolokaʻiGBIF 2
Mākua · OʻahuGBIF 2
Maunalua · OʻahuGBIF 2
Hālawa · OʻahuGBIF 2
Kapaka · OʻahuGBIF 2
Kawela · OʻahuGBIF 2
Waialua · MolokaʻiGBIF 2
Kalauao · OʻahuGBIF 2
Moanalua · OʻahuGBIF 2
ʻAiea · OʻahuGBIF 2
Honokōhau 1-3 · HawaiʻiiNat 1
ʻOʻoma 1 · HawaiʻiiNat 1
Kahaluʻu · HawaiʻiiNat 1
Lāʻiemaloʻo · OʻahuiNat 1
Palauea · MauiiNat 1
Wainiha · KauaʻiiNat 1
Humuʻula · HawaiʻiiNat 1
Kōloa · KauaʻiiNat 1
Kualoa 1 · OʻahuiNat 1
Waikapū · MauiiNat 1
Kamiloloa · MolokaʻiiNat 1
Manawai · MolokaʻiiNat 1
Mahana · LānaʻiiNat 1
Waikahekahenui · HawaiʻiiNat 1
Maunalei · LānaʻiGBIF 1
Launiupoko · MauiGBIF 1