千葉大学東葛キャンパス植物データベース

属名の詳細: Senecio L. [282]

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科名: Asteraceae

科の和名: キク

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説明（英語）: Large genus of more than 1,000 species of annuals, biennials, herbaceous perennials, climbers, shrubs, and small trees, some of them succulent. They are found worldwide in habitats ranging from mountains to sea shores, and in dry to moist soils. Basal leaves are entire or variably lobed, sometimes white or silver; stem leaves, if present, are smaller and alternate. The flowerheads, either solitary or borne in corymbs, are usually terminal and daisy-like (some species lack ray-florets), and yellow, white, red, blue, or purple, sometimes orange; they mainly have yellow, sometimes purple disc-florets. Use annuals for bedding, or in containers; grow small perennials in a scree bed or rock garden, and tall ones in a border or wild garden. In frost-prone areas, grow tender species in a cool or temperate greenhouse. All parts may cause severe discomfort if ingested.

耐寒性（英語）: Fully hardy to frost tender.

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繁殖（英語）: Sow seed in spring: for cultivation groups 2, 4, and 5 at 19-24°C (66-75°F); for groups 1 and 3 in containers in a cold frame. Divide groups 1 and 3 and S. doronicum in spring; take basal cuttings in early spring. Divide groups 4 and 5 as growth begins; take softwood cuttings in early summer or semi-ripe cuttings in mid- or late summer. Take semi-ripe cuttings of silver and white forms of group 2 in mid- or late summer.

病害虫（英語）: Prone to rust, particularly S. cineraria and its cultivars. Whiteflies, aphids, and red spider mites may be a problem under glass.

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備考（英語）: Cosmopolitan

備考: サワギク，シロタエギク

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更新情報: 作成: 2007-12-06 12:51; 更新: 2022-05-21 00:47

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