Arctopus dregei Sond.

Leaves widely ovate or rhomboidal, blades 40-100 mm long and broad, not thorny; lobes crenate; margins inconspicuously toothed; setae flexuose, 1-5 mm; spine(s) in leaf recesses between segments usually absent, when present then inflexed, attached to an inflexed laminar tooth, inflexed part of lamina absent or narrow, less than 1 mm wide, setae absent, vertical spines 0(to 3), 5 mm; petioles 20-8034-7 mm; wings broad, 1-4 mm wide. Male umbellule with pedicels longer than bracteoles, pedicels 1-10 mm; bracteoles lanceolate, spiny, 1-5 mm. Female inflorescence with rays 4-15 mm; pseudanthial bracteoles relatively small; 3 to 6; obovate, involute; ca. 834 mm at flowering stage, accrescent, becoming 9-2035-10 mm at fruiting stage; apex obtuse, with a sharp spine, spine ca. 2 mm; margin with 1 or 51 mm flexed, spinescent hairs; pseudanthial bracteoles becoming leathery at fruiting stage, reticulate venation not markedly prominent, becoming white when dried, not separating. Fruit not rostrate; 1-seeded; surface pustulate, white; developed mericarp ca. 835 mm; abortive mericarp small, not separating in mature fruit.