var. celatum W.J.de Wilde & Duyfjes, 2017

Dewilde, W. J. J. O. & Duyfjes, B. E. E., 2017, Taxonomy of Alangium section Conostigma (Alangiaceae), Blumea 62 (1), pp. 29-46 : 37

b. var. celatum W.J.de Wilde & Duyfjes , var. nov.

Differs from the typical variety in indument composed of short hairs, 0.3 mm long, and small fruits, 10‒13 mm long. — Type: De Vogel 3867 (holo L L.2500128; iso BO n.v.), Moluccas, Bacan , near Amasing Kali, S0°35' E127°28', 100 m alt., 4 Nov. 1974, fl .

Etymology. The name celatum (Latin = hidden) refers to this long time unnoticed taxon.

Indument composed of hairs c. 0.3 mm long. Fruit 1‒3 per infructescence, (dark) rusty brown, densely stellate-dendroid hairy (hairs 0.3‒0.5 mm long), ellipsoid, 10‒13 mm long, not ribbed, drying coarsely wrinkled; calyx remnant as calyx limb in flower.

Distribution ― N Moluccas (Morotai, Halmahera, Bacan), NW Papua (Vogelkop, Biak).

Habitat & Ecology ― Primary forest, in flat terrain and slop- ing hill side; loamy soil with stones, sandy clay soil, rocky soil; from sea level to 100 m altitude; flowering in November (one collection); fruiting in May, July and October, but most collections sterile.

Field-notes ― Many buttresses; bark smooth, not peeling.

Vernacular names — Gahihi (Morotai), Sigoeheel (Manikiong), Sewit (Karoon), Semena (Mooi), Mangoam (Biak), Aibifor (Noemfoor).

Additional specimens studied. MOLUCCAS, Morotai, Main & Aden 828, Tjaw, 30 m alt., 17 May 1949, st.; Tangkilisan bb 33865, Tobelo, 30 m alt., 18 May 1949, fr.; Tangkilisan bb 33866, Tobelo, 30 m alt., 18 May 1949, fr.; Tangkilisan bb 33870, Tobelo, 30 m alt., 18 May 1949, fr.; Kostermans bb 33786, Tobelo, 70 m alt., 7 May 1949, st.; Kostermans bb 33919, 40 m alt., 14 July 1949,fr.Halmahera,Weda, Neth.Ind. For.Service bb 24861, Tiloppe, 25 m alt., 18 Apr. 1938, st.; Neth. Ind. For. Service bb 24883, Tiloppe, 25 m alt., 1 May 1938, st.; Neth. Ind. For. Service bb 24884, Tiloppe, 1 May 1938, st.; Neth. Ind. For. Service bb 24909, Tiloppe, 4 May 1938, st. – PAPUA, Biak, Jarissetouw BW 595, 15 Mar. 1954, st.; Moll BW 9573, near Mansforbo, 35 m alt, 14 Nov. 1959, st.; Moll BW 9628, near Mansforbo, 35 m alt., 19 Nov. 1959,st. Sorong, Moll BW 11702, Warsamson Valley, 30 m alt., 2 Aug.1961, st.; Versteegh BW 4632, Sausapor, 15 m alt., 20 Oct. 1956, st.

Note — The here recognised varieties are very similar in- deed, but have quite different facies, especially by drying colour. Bloembergen (1939) placed a number of sterile collections of the present var. celatum in a new, but not formally described, subspecies of A. villosum .