Chiba University Matsudo/Kashiwa Campus Plant Database

Details of genus: Senecio L. [282]

genus_ja:

genus_en:

# spp.:

pub_year:

accepted: Accepted

Family: Asteraceae

family_ja: キク

Infra familial classification:

distribution_en:

description_en: 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.

hardiness_en: Fully hardy to frost tender.

cultivation_en:

propagation_en: 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.

pests_en: Prone to rust, particularly S. cineraria and its cultivars. Whiteflies, aphids, and red spider mites may be a problem under glass.

description_ja:

comment: Cosmopolitan

comment_ja: サワギク，シロタエギク

type_species:

Phylogenetic definition:

Update Information: Created: 2007-12-06 12:51; Updated: 2022-05-21 00:47

family: