e-Flora of Thailand

Volume 4 > Part 3 > Year 2018 > Page 234 > Leguminosae-Papilionoideae > Ormosia

10. Ormosia sumatrana (Miq.) Prainwfo-0000185591

J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 66(1): 150. 1897 & 69(2): 183. 1900; Ridl., Fl. Malay Penins. 1: 614. 1922; Back., Schoolfl. Java: 394. 1911; Koord., Exk. Fl. Java 2: 372. 1912; Heyne, Nutt. Pl.: 759. 1927; Merr. & Chen, Sargentia 3: 83. 1943; van Meeuwen, Reinw. 6: 234. 1962; Backer & Bakh.f., Fl. Java 1: 577. 1963; Whitmore, Tree Fl. Malaya 1: 301. 1972; Niyomdham, Thai Forest Bull., Bot. 13: 15. 1980.— Macrotropis sumatrana Miq., Fl. Ind. Bat. Suppl.: 294. 1861. Plate X: 1.


Accepted Name : This is currently accepted.



Synonyms & Citations :

Chaenolobium septemjugum Miq., Fl. Ind. Bat. Suppl.: 302. 1861.— Ormosia septemjuga (Miq.) Prain, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 66(2): 468. 1897 & 69(2): 184. 1900: Merr. & Chen, Sargentea 3: 83. 1943.
Chaenolobium decemjugum Miq., Fl. Ind. Bat. Suppl.: 302. 1861.— Ormosia decemjuga (Miq.) Prain, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 66(2): 468. 1897 & 69(2): 84. 1900; Merr. & Chen, Sargentea 3: 81. 1943.
Ormosia coarctata sensu Kurz, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist.43(2): 71. 1873, non Jacks., 1811.
Ormosia microsperma Baker in Hook.f., Fl. Brit. India 2: 253. 1878; Prain, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 66(2): 151, 468. 1897, incl. var. ridleyi & J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 69(2): 183. 1900; Ridl., Fl. Malay Penins. 1: 614. 1922.
Ormosia yunnanensis Prain, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 69(2): 183. 1900 & 73(2): 46. 1904; Craib, Fl. Siam. 1: 497. 1928; Chun, Sci. J. Coll. Sci. Sunyatsen Univ. 2(3): 45. 1930; Merr. & Chen, Sargentea 3: 84. 1943.
Ormosia euphorioides Pierre & Gagnep., Notul. Syst. (Paris) 3: 30. 1914 & in Lecomte, Fl. Indo-Chine 2: 508. 1920.


Description : Tree 25–40 m tall; young shoots, leaf-rachis, inflorescences and calyces velvety tomentose. Stipules small, caducous. Leaves with petioles ca 4 cm long; rachis 9–16 cm long. Leaflets 5–13, oblong-oblanceolate, 5.5–10 by 2.5–5.5 cm, apex acute to short acuminate, base rounded to subcordate, coriaceous, upper surface glabrous or glabrescent along midrib, lower surface velvety to tomentose; lateral veins 6–10 pairs; petiolules 5–6 mm long. Inflorescences terminal, paniculate, up to 15 cm long; pedicels 3–4 mm long. Calyx ca 5 mm long; teeth ovate acute, ± as long as tube. Corolla pinkish white; limb of standard orbicular, emarginate, ca 8 mm diam.; claw short; wings and keel oblong, ca 9.5 by 3.5 mm. Ovary densely hairy; ovules 2–3. Pods 1–3-seeded, broadly elliptic, oblong, torulose between the seeds if more than 1-seeded, 2.5–5 by 2.5 cm, glabrescent; valves thin, crustaceo-coriaceous. Seeds compressed, broadly elliptic, ca 10 by 9 mm; testa hard, smooth, shining, red or scarlet, not easily separable from the cotyledons.


Thailand : NORTHERN: Chiang Mai (Doi Pha Khao); NORTH-EASTERN: Nong Khai (Phu Wua WS); EASTERN: Nakhon Ratchasima (Khao Yai NP); PENINSULAR: Trang (Sikao), Songkhla (Saba Yoi).


Distribution : China (Yunnan), Vietnam, Malesia (Sumatra – type).


Ecology : Evergreen forests, up to 1,100 m alt.


Vernacular : Phai lek (ไพเล็ก)(Peninsular); ma klam ton (มะกล่ำต้น)(Northern, Northeastern).


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Plate 10: 1
Ormosia sumatrana (Miq.) Prain