General Information |
Distribution | Native to eastern United States.In the Hawaiian Islands,
naturalized on
Kure, Midway, Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Hawai`i.
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Habit
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Annual or biennial herb; stems 2‒7 dm long, usually single from base, branched above, occasionally many branched, usually puberulent.
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Leaves
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Basal leaves short-petiolate; blade oblanceolate, 4‒15 cm long, sharply toothed to pinnatifid, occasionally bipinnatifid, distal leaves much reduced, oblanceolate to linear, margin dentate to entire.
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Flowers
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Inflorescences in elongate racemes usually 1.5‒8 cm long, nearly the same diameter throughout. Flowers with sepals ca. 0.5 mm long, usually caducous, margin white; petals spatulate, ca. 0.6‒1 mm long; stamens 2(4, 6).
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Fruit
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Fruit suborbicular to broadly elliptic, 2‒4.2 mm long, apical notch broad, prominent, margin clearly exceeding the style.
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Seeds
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Seeds 1.5‒2 mm long.
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Chromosomes
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2n = 16, 32.
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Contributor
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Nancy Khan
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