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Oryza is situated within the tribe Oryzeae, which is characterized morphologically by its single flowered spikelets whose glumes are almost completely suppressed. In Oryza, two sterile lemma simulate glumes. The tribe Oryzeae is within the subfamily Bambusoideae, a group of Poaceae tribes with certain features of internal leaf anatomy in common. The most distinctive leaf character of this subfamily is their arm cells and fusoid cells found in their leafs. The Bambusoideae are in the family Poaceae, as they all have fibrous root systems, cylindrical stems, sheathing leaves with parallel veined blades, and inflorescences with spikelets.<ref>Heywood, V.H. Flowering Plants of the World 1993 Oxford University Press</ref>

While USDA plants lists only 7 species, others have identified up to 17, including ''sativa, barthii, glaberrima, meridionalis, nivara, rufipogon, punctata, latifolia, alta, grandiglumis, eichingeri, officinalis, rhisomatis, minuta, australiensis, granulata, meyeriana, and brachyantha''. One species, [[Rice]] (''O. sativa''), provides twenty percent of global grain and is a food crop of major global importance. The many species mentioned above are divided into two subgroups within the genus. -->

 

 

 

[[Categoria:Oryza|!]]

[[Categoria:Taxa Linnaei]]