| General Information |
| Distribution | In the Hawaiian Islands,
endemic to
Hawai`i.
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Habit
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Erect annual herbs 20-60 cm tall, usually branched, hispid throughout with stiff, erect, stinging hairs, also short-hirtellous, more densely so when young.
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Leaves
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Leaves very thin, lanceolate to oblong-lanceolate, 1.5-7 cm long,
0.9-2.5 cm wide, with stinging hairs, margins very coarsely serrate-incised, terminal tooth oblong with rounded apex, base truncate to very broadly cuneate, petioles 0.8-2.5 cm long, stipules minute, oblong.
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Flowers
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Flowers in clusters 0.2-0.5 cm long, sexes mixed but predominantly pistillate; staminate calyx ca. 0.5-0.6 mm long, very sparsely pubescent with short, hooked hairs; pistillate calyx ca. 1 mm long, swelling slightly in fruit, pubescent with short, hooked hairs.
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Fruit
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Achenes ovoid, compressed, ca. 1.1 mm long.
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