Trees or erect shrubs, occasionally with spine-tipped branchlets. Leaves alternate, rarely opposite, entire; stipules absent. Flowers actinomorphic, usually unisexual, dioecious, or polygamous, rarely bisexual. Male flowers often in cymes, sometimes in clusters or solitary; pistil rudimentary or absent. Female flowers often solitary, axillary, imperfect or without stamens. Calyx 3--7-lobed, persistent and often becoming enlarged in female or bisexual flowers; lobes abutting or overlapping in bud. Corolla 3--7-lobed; lobes convolute, rarely overlapping or abutting. Stamens hypogynous or at bottom of corolla, 2--4 X as many as corolla lobes, rarely as many as corolla lobes and alternate with them; filaments free or united in pairs. Ovary superior, 2--16-locular; ovules 1 or 2 per locule. Styles 2--8, free or basally united; stigma entire or 2-lobed. Fruit a ± fleshy berry, with few to several seeds. Seeds usually oblong; endosperm sometimes ruminate; hilum small.
Three genera and ca. 500 species: mostly in the tropics; one genus and 60 species (43 endemic) in China.[1]
There are approximately 138 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them: M. abyssinica · M. acapulcensis · M. albens · M. alboflavescens · M. beccarii · M. bequaertii · M. bicolor · M. bipindensis · M. buxifolia · M. cargillia · M. caribaea · M. carpinifolia · M. chrysantha · M. cinnabarina · M. clarkeana · M. compacta · M. cooperi · M. coriacea · M. crassinervis · M. cupulosa · M. dawei · M. diffusa · M. domingensis · M. ebenus · M. elegans · M. elliotii · M. elliptica · M. enervis · M. euosmia · M. fasciculosa · M. foliosa · M. forbesii · M. fragrans · M. gavi · M. geminata · M. glauca · M. globosa · M. gneissicola · M. gossweileri · M. graboensis · M. grisebachii · M. guineensis · M. hemicycloides · M. hilairei · M. hillebrandii · M. humbertii · M. humilis · M. inconstans · M. interstans · M. intricata · M. iturensis · M. janowskyi · M. kamerunensis · M. lamiana · M. lamponga · M. lancea · M. lateriflora · M. latifolia · M. laurentii · M. laurina · M. leonis · M. littorea · M. lokohensis · M. madagascariensis · M. magnifolia · M. maingayi · M. major · M. mannii · M. mayombensis · M. meeusiana · M. mellinoni · M. micrantha · M. mildbraedii · M. montigena · M. motleyi · M. mualala · M. myriophylla · M. myristicoides · M. myrmecocalyx · M. myrtilloides · M. natalensis · M. nebulorum · M. neilgerrensis · M. nicaraguensis · M. nigrescens · M. nutans · M. obducta · M. oblongicarpa · M. oblongifolia · M. obovata · M. olivacea · M. ovata · M. oxycarpa · M. palauensis · M. papuana · M. parviflora · M. pavonii · M. pentamera · M. perakensis · M. pervilleana
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