千葉大学東葛キャンパス植物データベース

属名の詳細: Petasites Miller [663]

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属英名: Butterbur, Sweet coltsfoot

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正名？: 正名

科名: Asteraceae

科の和名: キク

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説明（英語）: Genus of about 15 species of dioecious, rhizomatous perennials from Europe, Asia, and North America, some found in mountainous regions, others in swampy sites, by streams, and in moist woodland. They have long-stalked, heart- to kidney-shaped basal leaves and smaller, short-stalked or stalkless, scale-like stem leaves. Thick stems bear purple, white, or yellow flowerheads, which usually consist of a mixture of disc-florets, ray-florets, and thread-like florets (some fertile, some sterile); they are borne singly or in dense corymbs, racemes, or panicles. Individual plants are either male or female. Grown for their large leaves, they provide good ground cover beside a stream or pool, or in a wild garden, although they may become invasive. The flowers provide early nectar for bees.

耐寒性（英語）: Fully hardy to frost hardy. Below -l0°C (14°F), new growth of P. fragrans may die above ground, but the rhizomes will usually survive.

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繁殖（英語）: Divide in spring or autumn.

病害虫（英語）: Trouble free.

説明:

備考（英語）: N.temperate

備考: フキ

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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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