Volume 14 > Part 3 > Year 2019 > Page 452 > Calophyllaceae > Calophyllum

10. Calophyllum rupicola Ridl.wfo-0000581322

Trans. Linn. Soc. London, Bot. 3(9): 278. 1893 [1888–94 publ. Nov 1893], as ‘rupicolum’, Fl. Malay Penins. 1: 182. 1922, as ‘rupicolum’; M.R.Hend. & Wyatt-Sm., Gard. Bull. Singapore 15: 346, f. 13 O & P. 1956, as ‘rupicolum’; Whitmore, Tree Fl. Malaya 2: 168, f. 5. 1973, as ‘rupicolum’; P.F.Stevens, J. Arnold Arbor. 61(2): 515. 1980; Sungkaew et al., J. Forest Management 3(5): 16, f. 1B, f. 15. 2009; S.Gardner et al., Forest Tree S. Thailand 1: 294, f. 429 & 430. 2015; C.Byrne et al., Thai Forest Bull., Bot. 46(2): 176. 2018. Fig. 10.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Usually small to medium trees up to 15(–30) m tall; trunk straight or low branched, without buttresses; outer bark brownish yellow to greyish brown, smooth or lenticellate fissured; slash-mark pink; exudate usually opaque whitish, sometimes opaque-pale yellow. Youngest twigs flattened and angled to more or less quadrangular and slightly winged on the angle, glabrous; internode 1.5–3 cm long; uppermost pair of axillary buds 0.5–2 mm long, other ones usually supra-axillary; terminal buds 0.5–0.7 cm, long, with brown pubescence. Leaves waxy or glabrous; lamina elliptic, oblong-elliptic to oblong, 6.5–13.5 by 2–4 cm; apex acute to acuminate; base cuneate; margin entire; thiny coriaceous to coriaceous; drying greyish brown to reddish brown adaxially, sometimes waxy, reddish brown to brown abaxially, glabrous; midrib on adaxial surface depressed in a channel from the base to 1/3–1/2 of lamina length, raised on abaxial surface; lateral veins on both surfaces distinct, 6–10 veins/5 mm; petioles 0.7–1.2 cm long, concave adaxially and convex abaxially. Flowers axillary, covered with slightly brown pubescence, 1–1.7 cm long, ca 7-flowered; pedicels 0.3–0.7 cm long. Tepals 4; outer pair ovate, 2.7–3 by 2.2 mm, dorsal brown pubescent forming a band; inner one oblong-elliptic, 4–5 by 1.5 mm, glabrous. Stamens ca 50; filament 3 mm long; anther elliptic-oblong to oblong, 0.4–1 mm long. Ovary 1.2–1.6 mm long, style 2–2.7 mm long. Fruits broadly ovoid to sub-globose, 0.8–1.2 by 0.6–1 cm; mucronate to rounded at apex; exocarp plus mesocarp 0.07–0.15 cm thick; endocarp ca 0.3 mm thick, ellipsoid to globose, 0.7–1 by 0.6–0.8 cm.

Thailand : PENINSULAR: Narathiwat.

Distribution : Malaysia (Pahang – type), Sumatra.

Ecology : Peat swamp forests and along streams on granite bedrock in evergreen forests, 200–270 m alt. Flowering: October–November; fruiting: December–April.

Vernacular : Tang hon nam (ตังหนน้ำ), tang hon hin (ตังหนหิน).