Macaranga denticulata
(Blume) Müll. Arg. in DC., Prodr. 15(2): 1000. 1866; Hook.f., Fl.
Brit. India 5: 446. 1887. Mappa denticulata Blume, Bijdr. Fl. Ned. Ind. 625. 1826.
Trees, (3 -) 5 - 10 (- 15) m tall. Leaves broadly ovate-deltoid, often rhombate, rounded,
truncate, cordate or broadly rounded and subpeltate at base, sinuate and glandular-denticulate
or subentire along margins, shortly acuminate or cuspidate at apex, 7 - 30 x 5 - 24 cm, thinly
coriaceous, subglabrous above, puberulous or rusty tomentose to glabrescent and dotted with
numerous minute orbicular red or yellow glands on nerves beneath, biglandular at base, palmately
(2 -) 9 - 11-nerved, with 5 - 11 sessile discoid glands on lowermost veins on upper surface; lateral
nerves 10 - 12 pairs, arcuate to subparallel; petioles inserted at 1 - 2.5 cm above the base, (4 -) 8
- 17 (- 20) cm long, finely rusty pubescent; stipules ovate-lanceolate, ca 6 mm long. Male
inflorescences 5 - 8-flowered clusters on axillary 5 - 12 cm long panicles; bracts broadly ovate,
1 - 2 mm long; flowers sessile; sepals (2 -) 3 or 4, ovate, ca 2 mm across, pubescent; stamens 8
- 30; filaments 1 - 2 mm long; anthers 4-loculed. Female inflorescences axillary or terminal
panicles, 4 - 9 cm long; flowers solitary in each bract-axil, 3 - 4 mm across, rusty tomentose;
bracts linear-lanceolate to ovate-lanceolate, 2 - 5 mm long; pedicels short; calyx cup-shaped, 3
or 4-lobed, spathaceous; lobes ovate, 2 - 3 mm across; ovary 2 or 3-loculed, deeply lobed, rusty
pubescent; styles 2 - 3, 1 – 2 mm long. Fruits deeply or shallowly bilobed, grooved between the
2 cocci, 7 - 8 mm across, yellow-waxy gland-dotted, brown tomentose.
KEY TO THE VARIETIES
| 1 a. Branchlets densely ferruginous-tomentose; fruits deeply bilobed without any viscidly glandular patch at back | 2.1. denticulata |
| b. Branchlets tomentose but soon glabrescent; fruits not deeply bilobed, just grooved; cocci with large glabrous viscidly glandular patch at back | 2.2. pustulata |
