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Dinghushan | Family List | Poaceae | Oryza

Oryza sativa L.

Description from Flora of China

Oryza formosana Masamune & Suzuki; O. sativa var. formosana (Masamune & Suzuki) Yeh & Henderson.

Annual, aquatic, tufted. Culms erect, rooting at lower submerged nodes, 0.5–1.5 m tall. Leaf sheaths slightly inflated below, upper sheaths tight, glabrous, auricles falcate, ciliate; leaf blades 25–60 × 0.5–2 cm, glabrous, smooth or scabrid on both sides, margins scabrid, apex acuminate; ligule 10–40 mm. Panicle loosely contracted, up to 30 cm, nodding at maturity; branches 1–3 at lowest node, longest 2–12 cm, axils bearded or glabrous. Spikelets oblong to oblong-lanceolate, 7–10 mm, length 2–3.5 times width, persistent; sterile lemmas lanceolate, 1.5–4 mm, apex acuminate; fertile lemma papillose, spinulose, apex acuminate; awn very variable, slender or stout, up to 60 mm or more, scaberulous, sometimes absent. Anthers 1–3 mm. Caryopsis ovate or elliptic to cylindrical, 5–7 mm, whitish yellow to brown or blackish. 2n = 24.

This is the staple cereal rice, widely cultivated in tropical and warm-temperate parts of the world, and with many different cultivated races. It has the AA genome, and where Oryza rufipogon occurs as a weed in rice fields, intermediates may occur.

Cultivated, mainly in flooded fields. Throughout most of China [domesticated in SE Asia].

生活型: 草本

栽培植物: 栽培

生境: 栽培

用途: 主要粮食作物;茎叶药用,湿中下气、止泻、消积化痰

门中名: 种子植物门

亚门中名: 被子植物亚门

纲中名: 单子叶植物纲


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