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Amaranthus dubius

Mart. ex Thell. (1912)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-CoreEudicot Order: Caryophyllales Family: Amaranthaceae Genus: Amaranthus

spleen amaranth

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Description

Key Characters:

Growth Form:

Stems:

Roots:

Leaves:

Flowers:

Fruit:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Images

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Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

Kaua'i Not in flora
O'ahu Naturalized
Lana'i Not in flora
Maui Not in flora
Hawai'i Not in flora

Dispersal Agents


Pollinators

Bibliography

Name Published In: Fl. Adv. Montpellier: 203 (1912)

Other References

Wagner et al. 1990:186 (K, O, L, H); Staples & Herbst 2005:101 (DESCR); Starr et al. 2006:32 (EM); Faccenda & Ross 2024:26, 31 (remove K, L, M, H [re-IDed to A. retroflexus or A. hybridus], genuine A. dubius spm. on O, KEY)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Amaranthus dubius West Maui, Lahaina District, Lahaina, Moalii, between Mala and Kapunakea Naturalized in wast areas and along Hono`a`pi`ilani Highway north of Kapunakea Street. Preserved_Specimen Herbs to 1.5 metrs tall Oppenheimer, H.L. 62201 Maui BISH 2022-06-03
2 Amaranthus dubius Former Naval Air Station Barbers Point, Northern Trap & Skeet Range Roadside along Coral Sea Road. With Boerhavia coccinea, Cynodon dactylon, and other Grasses. Preserved_Specimen Robust woody herb 56 cm tall. BISH staff 98 Oahu BISH 2021-05-17
3 Amaranthus dubius Puuhale Road, Honolulu Growing in a weedy area along an industrial road. Preserved_Specimen Annual herb, erect, ca. 40-45 cm. tall; ca. 5 plants observed. Ross, M.C. 1882 Oahu BISH 2023-01-28
4 Amaranthus dubius Makakilo Landfill area. Growing on edge of dirt pile. Preserved_Specimen Leu, M. 73 Oahu BISH 1987-12-01
5 Amaranthus dubius Nuuanu Stream, Honolulu; adjacent to Liliuokalani Botanical Garden. Growing along stream banks Preserved_Specimen Annual herb, erect, ca. 150-160 cm tall. ca. 4-5 plants seen. Ross, M.C. 1959 Oahu BISH 2023-07-05
6 Amaranthus dubius Honolulu, Kahana Stream (tributary to Makiki stream). Completely channelized area N. of Wilder Ave Full sun, moist substrate Preserved_Specimen Common Faccenda, K. 1967 Oahu BISH 2021-06-12
7 Amaranthus dubius Wai'anae, Lualualei Homestead Rd., at entrance to farmland about 200 m SW of Kuwale Rd Roadside weed in dry area Preserved_Specimen Rare, only three plants seen Faccenda, K. 2991 Oahu BISH 2023-01-16
8 Amaranthus dubius Honolulu, S. Beretania St. & Isenberg St. On mauka side of S. Beretania St. across from Moiliili Neighborhood Park Roadside, w/ Dicanthium annulatum Preserved_Specimen Annual herb, erect, up to ca. 1.3 m tall ca 20 plants observed Ross, M.C. 2104 Oahu BISH 2025-03-20
9 Amaranthus dubius Batis meadow W of Barbers Pt. Deep Draft Harbor Common weed; growing in disturbed areas, near roads and clearings. Preserved_Specimen Funk, E.J. 416 Oahu BISH 1990-05-01
10 Amaranthus dubius At the base of Hauula mountain range, along jeep trail, passing the third gate Common weed. Near soya bean, papaya cultivated area. Preserved_Specimen Herat, T. 212 Oahu BISH 1972-08-22
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