Alangium hollrungii (K.Schum.) Melch. & Mansf.

Dewilde, W. J. J. O. & Duyfjes, B. E. E., 2017, Taxonomy of Alangium section Conostigma (Alangiaceae), Blumea 62 (1), pp. 29-46 : 33

6. Alangium hollrungii (K.Schum.) Melch. & Mansf.

Alangium hollrungii ( K.Schum.) Melch. & Mansf. (1925) 163. — Nyssa hollrungii K.Schum. (1905) 334. — Type: Hollrung 720 (holo B†), Papua New Guinea, Augustafluss , Sept. 1887, fr. ― Neotype, here designated: Henty NGF 49248 (L L.2498017; iso L L.2498018), Papua New Guinea, Brahman , Bundi subdistr., Madang Distr. S5°44' E145°25', 180 m alt., 17 Mar. 1972, fl. (see note).

Alangium papuanum Melch. (in Melchior & Mansfeld 1925) 165. — Alangium javanicum (Blume) Wangerin var. papuanum (Melch.) Bloemb.(1935) 284, f. 5j‒aa; (1939) 220, f. 10y‒aa. — Type: Ledermann 8137 (holo B†; iso BO,SING SING0208277 ), Papua New Guinea, Sepik, Bari-Schlucht , 3Aug. 1912, fl. & fr.

Tree 6–30 m tall; twigs pale brown or (grey-)brown, 2–4 mm diam, glabrous (early glabrescent from hairs less than 0.1 mm long); leaf bud subglabrous (early glabrescent). Leaves: petiole 0.6–1.2 cm long; lamina drying (dark) brown or blackish brown, glabrous, (narrowly) elliptic, 10–16 by 3.5–6.5 cm, base symmetric, cuneate, apex acute-acuminate; veins pinnate (or faintly plinerved at base), c. 7 on each side; tertiary venation thin, reticulate(-scalariform). Inflorescences minutely pale brown hairy (hairs less than 0.1 mm long), of 1 or 2 main branches (peduncles) from the leaf axil, each few-branched, (1–)4–7-flowered; peduncle (s) 1–4 mm long. Flowers minutely hairy; pedicel 1–2 mm long; corolla in bud 7–11 mm long, not swollen at base, apex (narrowly) rounded; ovary and calyx 3.5–4 mm long, finely ribbed; limb c. 1.5 mm long, at margin 3–3.5 mm wide, unlobed (truncate); petals 5 or 6, inside glabrous, 10–13 mm long; stamens 5 or 6, filament 2–2.5 mm long, ± thickened in upper half, glabrous, anther 7–9 mm long, connective glabrous; style hairy, c. 10 mm long, stigma conical. Fruit not seen, according to the original description: blackish brown, minutely hairy, glabrescent, ovoid, 25–30 by 11–16 mm, (presumably smooth); calyx remnant small.

Distribution — New Guinea (northern Papua (Hollandia (Jayapura)), Papua New Guinea (Madang, Sepik )).

Habitat & Ecology — In primary forest on sandy clayey soil, secondary forest on rocky clay, and dry land forest; 75‒180 m altitude; most collections sterile, flowering in February, March and August; fruiting in August and September.

Field-notes — Buttresses to 1 m high; bark strongly peeling. The ripening colour of the fruit is not recorded.

Vernacular names ― Ikoi, Joinawam, Kongmenem, Kwi, Soearenenioe, Soerinemoe (all Kemtoek).

Additional specimens studied. PAPUA, Iwanggin BW 9156, Sekoli, 75 m alt., 18 Feb. 1960, st.; Iwanggin BW 9164, Sekoli, 75 m alt., 18 Feb. 1960, st.; Schram BW 9372, Sekoli, 75 m alt., 13 Nov. 1950, st.; Schram BW 9415, Sekoli, 150 m alt., 19 Feb. 1960, st.; Schram BW 9432, Sekoli, 75 m alt., 20 Feb.1960, st.; Schram BW 9455, Sekoli, 75 m alt., 24 Feb.1960, fl.; Schram BW 9469, Sekoli, 75 m alt., 25 Feb. 1960, st.; Neth. Ind. For. Service bb 28956, Berap, 9 Aug. 1939, st. – PAPUA NEW GUINEA, Henty NGF 49248, Madang, Brahman, 180 m alt., 17 Mar. 1972, fl. (neotype) .

Note ― Because of the apparent absence of a duplicate of the destroyed holotype a neotype is herewith designated.