Flora of the Hawaiian Islands
Dicotyledon Literature for Chenopodium oahuense
Wagner et al., 1990, 1999. Literature for Chenopodium oahuense subsp. ilioense
Cantley et al., 2020.
   Amaranthaceae -- The Amaranth, Goosefoot Family Bibliography
      Chenopodium oahuense

Common name(s): goosefoot, lamb's quarters, pigweed, `ahea, `aheahea, `ahewahewa, `aweoweo, alaweo, alaweo huna (Ni`ihau), kaha`iha`i
General Information
DistributionIn the Hawaiian Islands, endemic to Lisianski, Laysan, French Frigate Shoals, Necker, Nihoa, Ni`ihau, Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i.

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Scentless to weakly scented shrubs, sometimes tree-like; stems erect or sometimes ascending or prostrate, 5-20(-30) dm long, branched, usually densely grayish mealy pubescent, sometimes young growth greener and only sparsely mealy pubescent.
Leaves thick and somewhat fleshy, broadly deltate to rhombic, (1.5-)2-4.2(-10) cm long, (0.6-)1.3-2.5(-5.5) cm wide, both surfaces densely mealy pubescent, but upper surface less so and greener than lower surface, usually 3-lobed, sometimes sinuate-dentate, the lobes or teeth obtuse to rounded, base truncate to cuneate, petioles (0.5-)1.3-2.5(-4.5) cm long.
Flowers in small, dense glomerules grouped into large, terminal, leafless or nearly leafless panicles; calyx ca. 0.8 mm long, completely enclosing the fruit at maturity, the lobes ovate, mealy pubescent, margins scarious, especially toward apex.
Seed dark brown, horizontal or sometimes vertical, ca. 0.8 mm in diameter, the surface papillose, margins indistinct.
2n = 36*.