Ormocarpum smitsii Arbainsyah, 2024

Adema, F., 2024, The genus Ormocarpum (Fabaceae - Papilionoideae) in Malesia and the Pacific, Blumea 69, pp. 27-35 : 33-34

7. Ormocarpum smitsii Arbainsyah , sp. nov. — Fig. 2f–j

Petioles and rachises with bulbous-based hairs, pedicels glabrous or with few hairs. Standard: blade c. 12 by 15 mm. Ovary with bulbous-based hairs. — Type: O. Jaag 922 (holo L!), Lesser Sunda Islands, Alor .

Shrub. Twigs terete, c. 6 mm diam, glabrous. Stipules triangular, c. 5 by 1–2 mm, both sides glabrous. Leaves with 13–15 leaflets. Petiole 5 – 6 mm long, with bulbous-based hairs, rarely glabrous; rachis mostly as the petiole, 20– 53 mm long; pulvinus c. 1 mm long. Leaflets: terminal one obovate, 6–10 by 3–6 mm, 1.6–2 times as long as wide, base cuneate, apex rounded, apiculate, upper surface glabrous, lower surface glabrous or with some appressed hairs along the midrib, midrib and nerves ± sunken above, nerves 4–7 per side, 1–1.3 mm apart, venation black; lateral leaflets mostly as the terminal one, elliptic, 7.5–10 by 4–6 mm, 1.6–1.8 times as long as wide; pulvinus c. 0.5 mm long. Bracts to the flowers broadly obovate, c. 0.5 by 0.6 mm, both sides glabrous. Pedicels c. 7 mm long, glabrous or with some hairs. Bracteoles rounded, c. 0.8 by 1 mm, both sides glabrous. Calyx c. 8 mm long, tube c. 6 mm long; teeth of upper lip deltoid, c. 1 by 1.2 mm; lateral lobes deltoid, c. 2 by 3 mm, median lobe triangular, c. 4 by 3 mm; both sides glabrous. Standard: claw c. 3 mm long; blade orbicular, c. 12 by 15 mm, apex rounded, 2 basal callosities, both sides glabrous. Wings: claw c. 3 mm long; blade orbicular, c. 10 by 9 mm, apex rounded, outside sculptured, both sides glabrous, auricles c. 1 mm long. Keel petals: claw c. 5 mm long; blade ‘boat-shaped’, c. 12 by 6 mm, auricles c. 1 mm long, both sides glabrous. Stamens diadelphous (9 + 1), tube 6–10 mm long, free part 10–11 mm long, glabrous; anthers equal, c. 1 by 0.5 mm, glabrous. Disc c. 1 mm long, glabrous. Ovary c. 5 mm long, with bulbous-based hairs; stipe c. 4 mm long, with bulbous-based hairs; ovules 3; style c. 8 mm long, glabrous. Pods young, articles flattened ellipsoid, c. 10 by 4 mm, with bulbous-based hairs.

Distribution — Philippines (Luzon), Lesser Sunda Islands (Alor).

Habitat & Ecology — Altitude: up to 200 m.

Note — The leaflets of O. smitsii are thick and have black veins at the lower surface.

Figures

Fig. 2 Details of flowers and fruits of Ormocarpum species.a–c. O. sennoides (Willd.) DC. subsp. sennoides. a. Wing;b. ovary: c. fruit. — d, e. O. vanuatense Arbainsyah. d. Stamens, 9 + 1; e. ovary. — f–j. O. smitsii Arbainsyah.f. Leaflet;g. wing; h. stamens, 9 + 1; i. ovary; j. fruit. — k–n. O. philippinense Arbainsyah. k. Wing; l. stamens, 2 bundles of 5, not fully split; m. fruit; n. ovary (a, b: Jacobs 4896; c. Schmutz 2190; d, e: Berry 27; f–j: Jaag 922; k, m, n: Cuming 1849; l: Clemens 17870; all L).). — Drawing by Anita Walsmit Sachs.