Callerya katinganensis Adema, 2019

Callerya katinganensis Adema View in CoL , sp. nov.

Vegetatively very similar to C. vasta . Different in indumentum colour: brown in C. kantinganense ; grey in C. vasta , indumentum of the calyx: in C. katinganensis sericeous outside,sericeous inside in upper part,in C. vasta outside with few hairs at the margin, inside with some hairs in upper part. The pods of C. katinganensis (14–23 by 2.5–3 cm) are usually smaller than those of C. vasta (23–24 by 4–4.5 cm). — Type: Mogea 4276 (holo L0772470; iso BO?, K, L00772469), Borneo,Kalimantan,Upper Katingan River, c. 50–100 km WNW of Tumbang Samba.

Trees, 17–25 m high, dbh 23–80 cm, usually with red exudate. Indumentum brown. Bark light grey, smooth, inner bark reddish

1 Naturalis Biodiversity Center,P.O.Box 9517,2300 RA Leiden, The Netherlands; e-mail: frits.adema@naturalis.nl.

brown. Wood white. Twigs terete, 6 –7 mm diam, strigose, soon glabrous. Stipules caducous. Leaves with 5 or 7 leaflets. Petioles 5–18 cm long, striate, glabrous; rachis 5.5–11 cm long, striate, glabrous; pulvinus 8–10 mm long. Stipellae absent. Leaflets: terminal one elliptic, 13.5–18.5 by 4.5–8.5 cm, 2.2–2.8 times as long as wide, base cuneate, apex rounded or shortly broad-acuminate, acumen c. 5 mm long, rounded, both surfaces glabrous, midrib and nerves above flat, nerves 5 –7 per side, 8–35 mm apart, nervation ± reticulate-scalariform; lateral leaflets mostly as the terminal one, narrowly ovate to elliptic, 8.5–16 by 4–6 cm, 2.1–3.1 times as long as wide, ± equal-sided at base; pulvinus 10–11 mm long. Inflorescences axillary or terminal, panicles, c. 9.5 cm long, peduncle c. 2 cm long, brown velutinous, branches c. 5.5 cm long. Bracts to the flowers triangular, c. 1.6 by 1.2 mm, outside sericeous, inside glabrous. Pedicels c. 3 mm long. Bracteoles ± halfway up the calyx, ovate-triangular, 1.7–1.8 by c. 1.2 mm, outside sericeous, inside glabrous. Calyx c. 5 mm high, tube c. 4 mm high; upper lobes inconspicuous, lateral teeth inconspicuous, median tooth triangular, c. 1.5 by 3 mm; outside brown sericeous, inside thinly sericeous in upper part. Corolla lila-pink, standard with a small yellow spot at the base. Standard: claw c. 2 mm long; blade orbicular, c. 14 by 15 mm, apex emarginate, without auricles or callosities, both sides glabrous. Wings: free from the keel petals; claw c. 3.5 mm long; blade obliquely hastate, c. 13.5 by 5 mm, apex rounded, upper auricle c. 2 mm long, parallel to axis of wing, lower auricle c. 1 mm long, perpendicular to axis of wing, both sides glabrous. Keel petals: claw c. 4 mm long; blade ± boat-shaped, c. 12 by 6 mm, apex rounded, upper auricle c. 2 mm long, parallel to axis of keel, both sides glabrous. Stamens diadelphous (9 + 1), c. 16 mm long, filaments free for 5.5–7 mm, glabrous; free stamen c. 12 mm long, glabrous; anthers c. 1.1 by 0.5 mm, glabrous. Disc obliquely tubular, vexillary side higher, c. 2 mm high, glabrous. Ovary c. 6 mm long, ± one row of hairs along lower suture, stipe c. 5 mm long, glabrous; ovules 2, towards top of ovary; style c. 5 mm long, some hairs at lower side in basal part. Pods ± thick-strap-like, reddish, 14–23 by 2.5–3 by c. 1 cm, stipe 8–10 mm long, outside glabrous. Seeds obliquely transverse-ovoid, 15–30 by 14–16 by 6–9 mm; hilum eccentric, 2–3 mm long.

Distribution ― Borneo: Sarawak, Central Kalimantan (Upper Katingan River).

Habitat & Ecology ― Logged or disturbed forest along river. Altitude: 100–200 m. Flowering: December; fruiting: February.

Note ― Argent & Wilkie 94363 from Kab. Kotawaringin Timur, Central Kalimantan is in all characters similar to C. katinganensis . However, on the label the specimen is described as ‘Extensive liana sprawling over verge’.