Details of Genus: Euphorbia L.
ID: 306
Genus ja:
Genus en: Milkweed, Spurge
# spp.: 2046 (from genus_families table) | 18 (from names table)
Accepted: Accepted
Family: Euphorbiaceae
Family ja: トウダイグサ
Infra familial classification:
Distribution en:
Description en: Very varied genus of about 2,000 species of annuals, biennials, evergreen, semi-evergreen, or herbaceous perennials, deciduous or evergreen subshrubs, shrubs, and trees, and succulents, widely distributed in a range of habitats in temperate, subtropical, and tropical regions. Most have much-reduced, usually male and female floral parts, grouped together into a cyathium; these may be solitary or borne in rounded or pyramidal, terminal or axillary cymes, umbels, or clusters, and are cupped by involucres of long-lasting, yellow, red, purple, brown, or green, fused bracts. Leaves are very variable, and often short-lived. Many euphorbias are suitable for a rock garden, a mixed or shrub border, or a woodland garden. In frost-prone areas, grow tender species in a cool or temperate greenhouse. Succulent species are suitable for a dry, tropical garden, or a warm or temperate greenhouse in frost-prone areas. All parts may cause severe discomfort if ingested; contact with their milky sap may irritate skin.
Hardiness en: Fully hardy to frost tender.
Cultivation en:
Propagation en: Sow seed of annuals in situ in spring. Sow seed of hardy perennials in containers in a cold frame as soon as ripe or in spring. Divide perennials in early spring, or take basal cuttings in spring or early summer; dip cut surfaces in charcoal or lukewarm water to prevent bleeding. Sow seed of frost-tender succulents as soon as ripe at 15-20°C (59-68°F), or root complete stems, or sections of stems, in spring. Root stem-tip cuttings of shrubby and tree species with bottom heat in spring or early summer.
Pests en: Grey mould (Botrytis) may be a problem. Aphids may also be troublesome on herbaceous euphorbias, and mealybugs on succulent ones. E. cyparissias is susceptible to rust, and E. pulcherrima to whiteflies.
Description ja:
Comment: Cosmopolitan
Comment ja: トウダイグサ，ポインセチア(poinsettia)，ハナキリン
Type species:
Phylogenetic definition:
Update information: Created: 2007-12-06 12:51; Updated: 2026-03-03 21:57 by hkokubun@mac.com
Family:
| System | Accepted? | Botanical name | Japanese name | Infra-familial classification | # species | |
| APG4 | Accepted | Euphorbiaceae | トウダイグサ科 | 2046 | Show | |
| PB2 | Euphorbiaceae | トウダイグサ科 | Show | |||
| PB3 | Euphorbiaceae | トウダイグサ科 | Show |