Botanical Survey of India | Flora of India

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Trees. Leaves alternate, simple, stipulate or exstipulate. Flowers small, bisexual, in axillary fascicles of racemes, cymes or panicles; bracts small, caducous. Sepals 5, contorted, shortly connate at base. Petals 5, free, contorted, persistent. Stamens 10 - 25, inserted on an annular disc or very shortly united at base. Ovary(2 -) 4 - 5 carpellary, superior,5 - 6-locular; ovules 2 or 1 in each locules; styles simple or shortly branched. Fruit a large drupe or samara or capsule, septicidal, coriaceous. Seeds arillate or winged with fleshy endosperm.

Tropical and subtropical regions of the world, 8 genera and ca 48 species; one genus with a single species in India.

Literature. HAJRA, P.K. (1983). Ixonanthaceae in Fl. India 13: 13 - 15. KOOL, R.(1980). A taxonomic revision of the genus Ixonanthes Linaceae. Blumea 26: 191 - 204. OLTMANN, O. (1971). Pollen morphologisch Systamatisch Unterschungen innerhalb. der Geraniales. Lehre J. Camer 1 - 163. WINKLER, H. (1931). Linaceae. In: Engler, A. & K. Prantl, Nat. Pflanzenfam. ed. 2, 3, 19a: 124.

Notes. J.D. Hooker (Fl. Brit. India 1: 410.1874) treated this family as a tribe under Linaceae while Winkler (in Engler & Prantl, Nat. Pflanzenfam. ed 2, 3, 19a: 82 - 1 : 1931) treated it as a subfamily Ixonanthoideae. Excell & Mendonca (Bull. Soc. Brot. 25· 105. 1951) raised it to the rank of a family which was subsequently followed by others including Hutchinson (Fam. Fl. Pl. 3rd. ed. 314-315. 1973) and in this flora as well.

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