Alangium ferrugineum C.T.White

de Wilde, W. J. J. O. & Duyfjes, B. E. E., 2017, The species of Alangium section Rhytidandra (Alangiaceae), Blumea 62 (1), pp. 75-83 : 76-78

2. Alangium ferrugineum C.T.White ― Fig. 1

Alangium ferrugineum C.T. White (1929) 248; Bloemb. (1935) 272, f. 3g, h. ― Alangium villosum (Blume) Wangerin subsp. ferrugineum (C.T.White) Bloemb. (1939) 206, f. 6f, 7m, n. ― Type: Brass 1066 (holo BRI BRI AQ0382983 ; iso L L0009829 , P P04552634 ), Papua New Guinea, Gulf Province, Aroara, Vailala River , 60 m alt., 25 Feb. 1926.

Shrub or tree 5‒10 m tall; twigs brown, 2‒3 mm diam, yellowish, ferruginous, or rusty hairy, hairs c. 0.5 mm long. Leaves: petiole 0.5‒1.5 cm long, hairy; lamina drying reddish brown, densely hairy, (ovate-)elliptic, 11‒18 by 5‒8.5 cm, base asymmetric, rounded or (short) cuneate, apex acute-acuminate; veins pinnate, 5‒8 at each side, tertiary venation thin, (sub)scalariform. Inflorescences hairy as the twigs, simple, 2‒8-flowered, peduncle 5‒15 mm long, 1‒1.5 mm diam. Flowers densely hairy; pedicel c. 3 mm long; corolla in bud c. 12 mm long (c. 15 mm long when fresh), c. 1.5 mm diam, base not swollen, apex subobtuse; ovary and calyx c. 2.5 mm long, not constricted below the limb, not ribbed, reddish brown-hairy; limb c. 1 mm long, not spreading, with 5 obtuse lobes c. 0.5 mm long; petals 5, inside glabrous, c. 12 mm long, connate at base into a tube c. 2 mm long; stamens 5, filament 3‒5 mm long, hairy, anther 8(‒10) mm long, connective glabrous; style 6‒10 mm long, (sparingly) hairy, stigma lobes curved, c. 3 mm long. Fruit 1 or 2 (or 3?) per infructescence, ripening yellow (?), densely brown-hairy, ovoid and longly narrowed towards apex, 30‒35 mm long, (10‒) 15‒20 mm broad, not ribbed; calyx remnant small, narrow, subtruncate.

Distribution ― Moluccas (Aru Isl. (Pulau Kobroor)), Papua; Papua New Guinea (Madang & Gulf Provinces).

Habitat & Ecology ― Alluvial forest, foothill forest, second- ary forest, clayey soil, coral stone; sea level to 400 m altitude; flowering in February and August; fruiting in February and July to November.

Field-notes ― Handsome tree; flowers white; fruit yellow.

Vernacular name ― Ala po'u (Aru Isl.).

Additional specimens studied. MOLUCCAS, Nooteboom 5773, Aru Isl. (P Kobroor), 0‒50 m alt., 27 Apr. 1993, fr. ― PAPUA, Aet (exp. Lundquist) 558, South New Guinea,Patawai near Oeta, 21 July 1941,fr.; Versteegh BW 4850, near Wage, Div. South New Guinea, along River Digoel, 5 m alt., 16 Sept. 1957, fr. ― PAPUA NEW GUINEA, Madang Prov., Josephstaal area, Takeuchi et al. 13103, 424 m alt., fr.; Takeuchi et al. 13674, 160 m alt., 1 Dec. 1999, fr.; Takeuchi et al. 13828, 80 m alt., 9 Aug. 1999, fl.; Brass 1066 (type), Gulf Prov.,Aroara, Vailala River, 60 m alt., 25 Feb. 1926.