Callerya vasta (Kosterm.) Schot

Callerya vasta (Kosterm.) Schot View in CoL

Callerya vasta (Kosterm.) Schot (1994) View in CoL 36. ― Millettia vasta Kosterm.(1960) View in CoL 349. ― Type: Kostermans 12516A (holo BO; iso K, L), Borneo , Belajan River, near Muara Lempong.

Trees, 20–35 m high, dbh 15–80 cm. Indumentum grey. Twigs ± terete, 6–8 mm diam, strigose when young, soon glabrous. Stipules caducous. Leaves with 5–9 leaflets. Petiole c. 8 cm long, glabrous; rachis c. 10 cm long, glabrous; pulvinus c. 9 mm long. Stipellae absent. Leaflets: terminal one ± obovate, c. 14.5 by 8 cm, c. 1.8 times as long as wide, base cuneate to rounded, apex acuminate, both surfaces glabrous, midrib above flat, nerves above slightly raised, 4–6 per side, 8–23 mm apart, nervation reticulate-scalariform; lateral leaflets mostly as the terminal one, ± elliptic, 11.5–15 by 5–6 cm, 2.3–2.6 times as long as wide, ± equal-sided at base; pulvinus 6–8 mm long. Inflorescences terminal, panicles, c. 15 cm long, peduncle c. 2 cm long, greyish strigose; branches 5–8.5 cm long. Bracts to the flowers triangular, c. 1.2 by 0.8 mm, both sides glabrous, margin ciliate. Pedicels c. 4 mm long, glabrous. Bracteoles at base of calyx, broadly ovate, 1–1.2 by 0.7–0.8 mm, both sides glabrous, margin ciliate. Calyx c. 7 mm high, ± oblique, all teeth inconspicuous, outside only few hairs at the rim, inside some hairs in upper part. Corolla View in CoL dark purple. Standard: claw c. 3 mm long; blade broadly obovate, c. 14 by 13 mm, apex emarginate, without auricles or callosities, both sides glabrous. Wings: free from the keel petals; claw c. 4 mm long; blade ± elliptic, c. 15 by 6 mm, apex rounded, upper auricle c. 1.5 mm long, lower auricle c. 0.5 mm long, lateral pocket inconspicuous, both sides glabrous, outside sculpted at upper side just above the auricle. Keel petals: claw c. 5.5 mm long; blade boat-shaped, c. 14 by 6 mm, apex rounded, auricle c. 1.2 mm long, lateral pocket inconspicuous, both sides glabrous. Stamens diadelphous (9 + 1), c. 14 mm long, glabrous, filaments free for 4–6 mm; free stamens c. 12 mm long, glabrous; anthers 2–2.2 by 0.9–1.3 mm, glabrous. Disc short-cylindric, c. 0.5 mm high, 10-lobed, glabrous. Ovary c. 8 mm long, glabrous (incompletely known). Pods ± falcate, flattened, 23–24 by 4–4.5 cm, glabrous, stipe 10–12 mm long. Seeds: young, rather flat; hilum eccentric.

Distribution ― Borneo: Sarawak, Central, East Kalimantan.

Habitat & Ecology ― Primary or secondary forest along rivers, sometimes periodically inundated. Soil: alluvial, yellowish, sandy loam.Altitude: up to 100 m. Flowering: June; fruiting: August.

Note ― SAN (Fidilis & Sumbing) 96387 resembles in several aspects C. vasta . However, the flowers are said to be yellowish white. The only yellow-flowered Callerya species is C. strobilifera , which is a liana, not a small tree.