Notobubon sonderi (M.Hiroe) Magee

Slender shrub, 0.5-1.0 m tall. Stem branched at ground level, branches becoming decumbent, glabrous. Leaves often congested near the base of the peduncle, (90)110-250(390) mm x 40-150 mm; blade ovate, 3-pinnate. Ultimate leaflet segments ovate, 10-30 mm x 6-15 mm, pinnatisect; base attenuate; venation pinnate; discolorous, adaxial surface green to dark green, abaxial surface silvery and glaucous; lobes narrowly oblong, flat, 3-10 mm x 0.8-1 mm, margins entire; terminal lobes equal to or 2 times longer than adjacent lateral lobes. Petioles up to 100(180) mm long, sheathing at the base only. Inflorescence long (more than two times longer than the diameter of the primary umbel), with 0-4 smaller lateral umbels. Primary umbel with 12-20 rays, orbicular; bracts linear to lanceolate, apex acuminate, glabrous; rays 46-64 mm long, subequal, glabrous; bracteoles linear to lanceolate, apex acuminate, glabrous, shorter than raylets; raylets glabrous. Flowers with sepals minute, 0.1-0.3 mm long, glabrous; petals glabrous. Fruit elliptic, 5.0-6.5 mm x 3.0-3.5 mm; mericarps homomorphic; median and lateral ribs slightly prominent; marginal ribs narrowly-winged; commissural vittae broad; vallecular vittae broad; additional vittae under vascular bundles in ribs, smaller than vallecular vittae.