Author: (Cav.) Hattink
Morphological description
Liana or small tree , up to 20 m; branchlets unarmed or with a few prickles. Stipules triangular, c. 2 mm long.
Leaves: rachis 20–40 cm; pinnae 4–8 pairs, 7–13 cm. Leaflets alternate to subopposite (latisiliqua Caes lft/pod CLV8 ), sometimes some of them opposite, 6–8 pairs per pinna, petiolulate (1–4 mm), membranous to coriaceous, oblong or obovate, 1.5–7 by 0.75–5 cm; base unequal to subequal, truncate, obtuse, or cuneate; apex rounded, truncate, or retuse; glabrous or appressed shortly hairy.
Inflorescences axillary and terminal, paniculate, 30–100 cm long, the rachis unarmed; pedicels 10–20 mm, articulated at the base.
Flowers (latisiliqua Caes fl Reinw9/8 )pubescent or glabrous. Hypanthium 3–5 mm deep and 7–12 mm wide. Sepals: lowest one twice as long as the others, 7–15 by 6–8 mm. Petals: standard arched, bilobed to about half of its length, 8–12(–19) by 6–10(–14) mm, 1–2 mm wide at the base; the other petals 2–6 by 1.5–3 mm, shortly clawed or sessile, often ciliate. Stamens far exserted; ¾laments c. 14(–22) mm; anthers 1–2 mm. Pistil pubescent or glabrous; ovary c. 5 by 1 mm, flat, 6–13-ovuled; style c. 8 mm, stigma oblique, hairy along the margin.
Pods (pedicels 15–31 mm); 10–16 by 3–5 cm (incl. 10–15 mm wide wing at the upper side), indehisent; base cuneate (latisiliqua Caes podb Reinw9/4 ); apex variable (latisiliqua Caes pods Reinw9/6 ), 6–9(–13)-seeded (latisiliqua Caes lft/pod CLV8 ).
Seeds ellipsoid, 9–12 by 6–7 mm, flat, brown, dull.
Distribution
Vietnam; in Malesia: Borneo (Brunei, Sarawak, Kalimantan), Philippines (scattered), Celebes (N, C & SE), Papua New Guinea (Morobe Prov.).
Habitat & Ecology
Rocks on sunny hot dry slopes, riverbanks and roadsides, primary forest and forest fringes, from 100 to 1500 m altitude.