Microcos antidesmifolia var. hirsuta, (King) Burret

Chung, R. C. K. & Soepadmo, E., 2011, Taxonomic revision of the genus Microcos (Malvaceae-Grewioideae) in Peninsular Malaysia and Singapore, Blumea 56 (3), pp. 273-299 : 277-280

b. var. hirsuta (King) Burret — Fig. 3 , Map 1

Microcos antidesmifolia var. hirsuta (King) Burret (1926) 780; R.C.K. Chung et al. (2005b) 106. — Grewia antidesmifolia King var. hirsuta King (1891) 113; Ridl. (1933) 489. — Lectotype ( Chung et al. 2005b): King’s Collector 10185 (holo K), Peninsular Malaysia, Perak.

Microcos elmeri Merr. (1929) 186; Masam. (1942) 450; Coode et al. (1996) 323, p.p. — Grewia elmeri (Merr.) P.S. Ashton (1988) 443. — Type: Elmer 20911 (A, BO, GH, K, L, NY, SING, UC), Borneo, Sabah, Tawau.

Microcos creaghii Ridl. (1933) 490; Masam. (1942) 449. — Type: Creagh s.n. (K), Borneo, Sabah, Sandakan .

Grewia antidesmifolia auct. non King (1891): Kochummen (1973) 397, p.p. (excl. G. antidesmifolia var. hirsuta ).

Twigs densely or sparsely covered with stellate hairs. Stipules lanceolate, 4–10 by 1–2 mm, apex acute or obtuse, sparsely covered with stellate hairs on both sides, caducous to persistent. Leaves: petioles (5–)6 –10(–15) mm long; blade glabrous or sparsely covered with stellate hairs on midrib and secondary veins above, sparsely covered with stellate hairs beneath, inequilateral; domatia absent. Inflorescences Type A and Type B panicles; involucral bracts of inner whorl narrowly oblong, 1.5– 2 by 0.2– 0.4 mm, apex acute. Flower buds 2 –3.5 by 1–1.8 mm; sepals oblong, 3– 4.5 by 0.7–2 mm; petals absent or 5, elliptic or oblong, 1.2 –1.5 by 0.8 –1 mm, apex rounded, outside sparsely covered with glandular trichomes all over, inside

2 mm

densely covered with stellate hairs around the glands to c. 0.75 of its length; androgynophore 0.5 – 0.8 mm long; stamens with filaments sparsely covered with stellate hairs at base to c. 0.25 of its length and glabrous towards the apex; ovary 3(– 4)-locular, 0.8–1.5 mm diam, depressed ovate or depressed obovate in cross section, covered with stellate hairs or sparsely covered with glandular trichomes. Fruits with 3– 4 shallow vertical lobes. Pyrenes 3 – 4, 1– 2(–3) fertile, 1–2(–3) sterile.

Distribution — Peninsular Malaysia (confined to Perak and Selangor) and Borneo.

Habitat & Ecology — In alluvial freshwater swamp forest and mixed dipterocarp forest on yellow clay or brown to black soil; on hillsides, ridges or along riversides, at 150 – 900 m altitude. Flowering and fruiting almost all year round.

Uses — Ripe fruits edible.

Figures

Map 1 Distribution of M. antidesmifolia (King) Burret:var.antidesmifolia ($) and var. hirsuta (King) Burret (:) in Peninsular Malaysia.

Fig. 3 Microcos antidesmifolia (King) Burret var. hirsuta (King) Burret. a. Fruiting leafy twig; b. flowering leafy twig; c. flower buds surrounded by involucral bracts; d. longitudinal section of flower bud; e. flower with sepals and petals removed; f. adaxial surface of sepal; g. abaxial surface of petal; h. adaxial surface of petal; i. stigma; j. fruit; k. longitudinal section of fruit; l. cross section of fruit (a: Kadir SAN A 2893; b: Enggoh FMS 48988; c–i: Elmer 20911; j–l: Castro SAN A 819). — Drawn by J. Pao, SAR.