Macaranga indica

Gregarious trees, bark grey, smooth; exudation red, watery; branchlets fulvous tomentose, glaucous. Leaves simple, alternate; stipules large, lateral, densely pubescent, deciduous; petiole 12-22 cm long, stout, pubescent; lamina 15-30 x 12-25 cm, ovate-orbicular or deltoid-ovate, base peltate, apex acuminate, margin entire or toothed, glabrous above and tawny-pubescent, intermingled with yellowish glands beneath; 2 large glands near the petiolar insertion above, coriaceous; 8-10 ribs from base, palmate, prominent; lateral nerves 6-12 pairs, parallel, prominent; intercostae scalariform, prominent, margin glandular. Flowers unisexual, yellow, in axillary panicles having zig-zag branches; bracts small with a large, flat glandular appendage; male flowers: tepals 3, initially connate, later spreading, concave, ovate, valvate, acute, glandular; stamens 6-8, shortly connate below, exserted; anthers 4-celled; female flowers: tepals 4, lanceolate, basally connate at base, valvate, acute, glandular; ovary superior, 2-6-celled, globose, echinate, ovules one in each cell; style lateral; stigma acute. Fruit a capsule, 7-8 mm across, globose, echinate; seeds black.

This is Macaranga indica

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Try to check with comparative images.

I think it is Macaranga indica

Is there any other species reported from Mizoram?

Yes, I agree with you for Macaranga indica Wight

Looks like Macaranga indica but flowers are required for confirmation.

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Euphorbiaceae: Macaranga indica Wight: 1 high res. image.
synonym: Macaranga adenantha Gagnep.
location/date: University of Agricultural Sciences campus, Bangalore, July 1997

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References:

The Plant List  Annotated checklist of Flowering plants of Nepal  Flora of China  India Biodiversity Portal  Biotik  Macaranga indica Weight, Indian Medicinal Plant