Chiba University Matsudo/Kashiwa Campus Plant Database

Details of genus: Chrysanthemum L. [109]

genus_ja: キク

genus_en:

# spp.: 36

pub_year: 1753

accepted: Accepted

Family: Asteraceae

family_ja: キク

Infra familial classification: Subfamily Asteroideae: Tribe Anthemideae

distribution_en: Temp. Eurasia to Indo-China, Subarctic America to Canada

description_en: Genus of about 20 species of upright, bushy annuals and herbaceous perennials (some with woody bases), now almost all attributed by botanists to the genus Dendranthema, but here maintained under Chrysanthemum for the benefit of gardeners. The annual species come from the Mediterranean region, where they grow in dry fields and wasteland; the herbaceous perennials are from the Arctic, parts of N. and C. Russia, China, and Japan. The aromatic, alternate, ovate to lance-shaped, dark green leaves, 5-17cm (2-7in) long, are shallowly to deeply lobed or pinnatisect, occasionally entire, and often feathery. Chrysanthemums are grown primarily for their showy flowerheads, 2.5-30cm (1-12in) across, which consist of ray-florets in a variety of colours, including yellow, white, pink, purple, and red, with yellow disc-florets; they are cultivated in a multiplicity of forms. For ease of reference, chrysanthemums have been divided into the following groups

hardiness_en: Fully hardy to frost tender.

cultivation_en:

propagation_en: Sow seed of charms and cascades at 13-16°C (55-61°F) in late winter or spring. Sow seed of Rubellum Group at 13-16°C (55-61°F) in spring, or divide in autumn or in early spring. Sow seed of annuals in containers in a cold frame in early spring, or in situ from spring to early summer; in frost-free areas, sow in situ in autumn for early flowering. Take basal cuttings of florists’ chrysanthemums from over-wintered stools: for late-flowering cultivars, take cuttings in early or mid-winter; for other groups take in early spring. Root cuttings in loamless potting compost with dry sand on the surface, at around 16°C (61°F). Place in a cold frame after first potting; protect from frost and ventilate as weather allows. Harden off in mid-spring.

pests_en: Vulnerable to aphids, earwigs, eelworms, capsid bugs, leaf miners, red spider mites, and white-flies. Prone to fungal rot, grey mould (Botrytis) , powdery mildew, and white rust. Viruses may cause stunting, yellow markings, and puckering of leaves.

description_ja:

comment:

comment_ja: キク（イエギク），イソギク

type_species:

Phylogenetic definition:

Update Information: Created: 2007-12-06 12:51; Updated: 2023-08-02 12:03 by hkokubun@mac.com

family: