Callerya sarawakensis Adema, 2019

Callerya sarawakensis Adema View in CoL , sp. nov.

Vegetatively very similar to C. vasta . Different in the indumentum of the calyx: in C. sarawakensis outside sericeous, inside sericeous in upper part, in C. vasta outside with few hairs at the margin,inside with some hairs in the upper part, and in the height of the disc: in C. sarawakensis 2–2.5 mm high, in C. vasta c. 0.5 mm high. The pods of C. sarawakensis (19–24 by 2.5–4 cm) are mostly smaller than those of C. vasta (23–24 by 4–4.5 cm). ― Type: S (Paul Chai) 18911 (holo L0772465 ; iso K, fide Schot 1994 also A, BO, S, SING), Borneo , Sarawak, 3rd Division , Kapit, Bukit Raya .

Trees, 15–30 m high, dbh 30–60 cm, red exudate present. Indumentum grey. Bark grey spotted brown or pale brown, smooth, flaky or narrowly fissured, inner bark laminated, pale yellow to reddish. Sapwood yellowish white. Twigs terete, 6–8 mm diam, greyish sericeous, glabrescent. Stipules caducous. Leaves with 7 leaflets. Petioles 3–9 cm long, striate, glabrous; rachis 5.5–15 cm long, striate, glabrous; pulvinus 6–15 mm long. Stipellae absent. Leaflets: terminal one elliptic to obovate, 12.5–27 by 6.5–8.5 cm, 1.7–3.2 times as long as wide, base (broadly) cuneate, apex obtuse or shortly broad-acuminate, acumen 4 –7 mm long, both surfaces glabrous, midrib and nerves above flat, nerves 6–8 per side, 8–35 mm apart, nervation reticulate-scalariform; lateral leaflets mostly as the terminal one, elliptic to ovate, 9–25.5 by 5–8 cm, 1.2–3.8 times as long as wide, ± equal-sided at base; pulvinus 9–13 mm long. Inflorescences terminal, rarely axillary, panicles, 11.5–18 cm long, peduncle 2.5–7 cm long, grey velutinous; branches 4–9.5 cm long. Bracts to the flowers (narrowly) ovate, 2.8–5 by 1–2 mm, outside sericeous, inside glabrous or with some hairs to sericeous at the base. Pedicels 2.5–3.5 mm long, grey velutinous. Bracteoles at base of the calyx, (narrowly) ovate, 1.7–4 by 1–1.4 mm, outside sericeous, inside glabrous. Calyx oblique, 6–7 mm long, tube 5–6 mm long, upper lobes inconspicuous; lateral teeth inconspicuous or ± semi-circular, c. 1 by 3–4 mm, median tooth triangular, 2–3 by 4–5 mm; outside sericeous, inside sericeous in upper part. Corolla purplish or pink, standard with a lighter pink to yellow spot at the base. Standard: claw 2–3 mm long; blade ± orbicular to ± reniform, 12–16 by 15–18 mm, apex emarginate, without auricles or callosities, both sides glabrous. Wings: free from the keel petals; claw 4–5 mm long; blade elliptic to hastate, 12–17 by 5–8 mm, apex rounded, upper auricle 2–3 mm long, ± parallel to the blade, lower auricle c. 1 mm long, ± parallel to the blade, lateral pocket inconspicuous, outside sculpted along upper margin, both sides glabrous. Keel petals: claw c. 4 mm long; blade ± boat-shaped, 11–17 by 6–7 mm, apex rounded, upper auricle 2.5–3 mm long, lateral pocket inconspicuous, both sides glabrous. Stamens diadelphous (9 + 1), 15–17 mm long, glabrous, filaments free for c. 2 mm; free stamen 13–15 mm long, glabrous; anthers c. 0.9 by 0.4–0.5 mm, glabrous. Disc tubular, slightly higher at the vexillary side, 2–2.5 mm high, lobed at apex. Ovary 5 –6 mm long, with some hairs along the sutures, otherwise glabrous, stipe 4–5 mm long, glabrous; ovules 2 or 3; style c. 6 mm long, glabrous. Pods ± strap-like, 19–24 by 2.5–4 cm, glabrous, stipe c. 1.5 cm long. Seeds ± discoid, c. 17 by 17 by 5 mm, hilum eccentric, 2–3 mm long.

Distribution ― Borneo: Sabah, Sarawak.

Habitat & Ecology ― Primary or secondary forest, usually along rivers. Soil: (yellow) sandy clay or clay. Altitude: up to 300 m. Flowering: May, July, August, October, November; fruiting: January, May.

Uses ― Edible oil is extracted from fruits.