Chiba University Matsudo/Kashiwa Campus Plant Database

Details of genus: Petasites Miller [663]

genus_ja:

genus_en: Butterbur, Sweet coltsfoot

# spp.:

pub_year:

accepted: Accepted

Family: Asteraceae

family_ja: キク

Infra familial classification:

distribution_en:

description_en: 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.

hardiness_en: 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.

cultivation_en:

propagation_en: Divide in spring or autumn.

pests_en: Trouble free.

description_ja:

comment: N.temperate

comment_ja: フキ

type_species:

Phylogenetic definition:

Update Information: Created: 2007-12-06 12:51; Updated: 2020-09-04 03:56

family: