千葉大学東葛キャンパス植物データベース

属名の詳細: Ricinus L. [2108]

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科名: Euphorbiaceae

科の和名: トウダイグサ

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説明（英語）: Genus of one species of erect, very fast-growing, mound-forming, suckering, monoecious, evergreen shrub, widely naturalized in wasteland, at roadsides, and on stony slopes, from N.E. Africa to W. Asia. It is grown mainly for its large, glossy, palmately lobed leaves. Spikes of small, cup-shaped flowers are followed by prickly, ovoid capsules. In frost-prone areas, grow as an annual in a cool greenhouse or conservatory, or as a specimen plant for summer bedding. In warmer climates, grow in a border. All parts of R. communis, particularly the seeds, are highly toxic if ingested; contact with the foliage may aggravate skin allergies.

耐寒性（英語）: Half hardy.

栽培（英語）:

繁殖（英語）: Soak seed for 24 hours before sowing in late spring; sow singly into 9cm (3 1/2in) pots, at 21°C (70°F). Grow young plants on at 13°C (55°F); pot on into 13cm (5in) pots before they become pot-bound, to prevent premature flower production. Plant out when all danger of frost has passed.

病害虫（英語）: Red spider mites may be a problem under glass.

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備考（英語）: E & NE Africa to Middle East

備考: トウゴマ(ヒマ)

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更新情報: 作成: 2007-12-06 12:51; 更新: 2020-09-04 03:56

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