Botanical Survey of India | Flora of India

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M.P. Nayar and Anukul Datta

Trees or shurbs, unarmed, non laticiferous. Leaves opposite, exstipulate, simple or compound. Inflorescence corymbose-fasciculate, racemose or fasciculate, terminal or lateral. Flowers andro-monoecious, andro-dioecious or dioecious, actinomorphic, usually 4-5 -merous. Sepals free. Petals sometimes none. Disc annular, lobed. Stamens 4-12, often 8, hypogynous or perigynous; filaments free, filiform; anthers 2-loculed, versatile, oblong or linear, longitudinally dehiscent; pollen grains tricolpate or tricolporate. Ovary superior, bilobed, 2-loculed, compressed; ovules 2 in each locule; style 1 or 2, 2-armed, free, or connate; stigmas 2, filiform. Fruit a samara; mericarps 2, winged on the outer side, 1-2 -seeded. Seeds campylotropous, exalbuminous; testa thin. Embryo with flat or plicate cotyledons.

Temperate northern hemisphere and tropical and sub-tropical Asia; 2 genera and co 120 speices, 1 genus and 17 species in India.

Literature. FANG. WEN P'El (1978) Aceraceae. Fl. Reipubl. Rop. Sinicae 46: IV- X, 66-273. 68. pl. MURRAY, E. (1975) Aceraceae in Pl. W. Pak.92: 1-7. NAVAR, M.P. & A. DUTTA. (1982) Aceraceae. Fasc. Fl. India 9: 1-22.

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