Alangium meyeri var. macilentum, 2017
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publication ID |
https://doi.org/10.3767/000651917X695164 |
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persistent identifier |
https://treatment.plazi.org/id/03C90C1C-0108-B60D-FFA1-FD8AD29FF907 |
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treatment provided by |
Felipe |
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scientific name |
Alangium meyeri var. macilentum |
| status |
var. nov. |
b. var. macilentum W.J.de Wilde & Duyfjes View in CoL , var. nov.
Differs from the typical variety in slender twigs,and leaf blade, corolla in bud and fruit all smaller. — Type: Wood A4101 (holo L L0521507 ; iso A n.v., BRI n.v., KEP n.v., SING), Borneo, Sabah, Kalabakan , 30 miles WNW of Tawau, 100 m alt., 24 Nov. 1954, fl .
Etymology. The name macilentum (Latin = meager) refers to the delicate stature of the twigs with smaller leaves, flowers, and fruit.
Tree 10–25 m tall. Twigs 1.5–2(–2.5) mm diam, minutely hairy (hairs 0.1 mm long or less). Inflorescences 1–2-flowered. Corolla in bud c. 8 mm long; ovary and calyx minutely hairy. Fruit 1 (or 2) per infructescence, minutely hairy, not or late glabrescent, 15–20 mm long.
Distribution — Borneo ( Sarawak, Sabah, E Kalimantan).
Habitat & Ecology — Primary forest, ridge of mixed dipterocarp forest, presumably preferring poorer soils of ridges; dark brown soil, yellow and sandy clay; sea level to 200 m altitude.
Field-notes — Small and low buttresses recorded.
Additional specimens studied. SARAWAK, Wright et al. S 32266 View Materials , 5th Div., Sungai Medamit, 200 m alt., 9 Oct. 1972, fr.; Paie S 15123 View Materials , Bintulu , Segan Forest Reserve , 23 Nov. 1961, fr.; Othman et al. S 43369 View Materials , 7th Div., Sungai Semawat , 22 Oct. 1981, f. – SABAH, Patrick SAN 36750 About SAN , Sandakan , Sepilok Forest Reserve , 15 May 1963, fl.; Enggo BNBFD 10450 , Sandakan , Sepilok Forest Reserve , 30 m alt., 22 July 1939, st.; Elmer 21176, Tawau ; Elmer 21447, Tawau ; Sinanggul SAN About SAN 54534, Lahad Datu , Kelumpang Forest Reserve , 100 m alt., fl. – KALIMANTAN, Saridan 410, E Kalimantan, Kotawaringin, 50 m alt., Nov. 1993, fr .
Note — Alangium meyeri var. macilentum denotes specimens of A. meyeri which differ from the type variety in their diminutive habit; it approaches A. kayuniga , which differs chiefly in almost lacking any indument. Alangium meyeri var. macilentum also links up with meager specimens provisionally reckoned as belonging to A. javanicum from SE Kalimantan, the latter distinct in a much more conspicuous indument of hairs c. 0.5 mm long on twig apex and leaf bud. With magnification one can see that var. macilentum has a dense covering of minute hairs less than 0.1 mm long.
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