Euphorbia x martinii

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Euphorbia x martinii Rouy

Euphorbiaceae

Life form: shrub
Usage: ornamental plant

Exposure: sun   7

Moisture: dry bis Moisture: moderately moist

Soil: sandy loam

Arrangement: alternate
Leaves: evergreen

Shape: lanceolate

Division: simple

Shape: cyathium
Fruit: loculicidal capsule

154B / d3d429 

Inflorescence: cyme

Petals: single
Habit: nodding

Growth form: clump-forming

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Rosopsida
Subclassis:
Dilleniidae
Superordo:
Euphorbianae
Ordo:
Euphorbiales
[Modify]   [Versions]

Euphorbia x martinii is a garden hybrid from Euphorbia characias and Euphorbia amygdaloides.

Contents

Naming

Euphorbia x martinii was described in 1900 by Georges C.Chr. Rouy. The name is considered as validly published.

Taxonomy

Euphorbia x martinii is a species in the genus Euphorbia (milkweed) which contains approximately 2140 to 2233 species and belongs to the family of the Euphorbiaceae (Spurge Family). he type species of the genus is Euphorbia antiquorum.

Characteristics

Euphorbia x martinii - growth
Euphorbia x martinii - flower
Euphorbia x martinii - inflorescence

Growth

The dwar-shrubs have a bushy growth and reach heights of 50 to 80 (rarely 100) centimetres and the same in width. They reach their final height after two to five years. The branches and young shoots are burgundy red.

Leaves

Euphorbia x martinii is an evergreen plant with alternate simple leaves. The leaves are often tinted red when young turning greyish green with age. They are lanceolate with entire margins.

Flowers and Fruit

The flowers are greenish yellow cyathia, often with a purple eye. They are arranged in cymes that are surrounded by greenish yellow bracts. The plants bloom from May to July.

The fruits are loculicidal capsules that lignify while maturing. Once mature the capsules 'explode', catapulting the seeds up to a few meters from the plant.

Cultivation

Euphorbia x martinii prefers a sunny and sheltered position. It tolerates temperatures down to -18°C (USDA zone 7), but needs protection if frosts appear without any snow covering the ground. The shrubs grow on well-draining soils such as sandy loam and like dry to moderately moist conditions. They will grow on acid, neutral and alkaline soils.

Classification after Prof. Dr. Sieber

  • open areas
  • rockeries
  • steppes/dry forests (usually calcareous soil)

Uses

Euphorbia x martinii is well suited as a container plant or for beds and borders with a mediterranean feel. It makes good groundcover and can be used either as a specimen plant or in groups. There it will appear to its best advantage in groups of 3 to 5 specimens. The recommended planting distance is 40 to 60 centimetres. The flowers make good cut flowers (Caution: always wear gloves when cutting the plants!).

Good neighbours are e.g. Carlina acaulis subsp. caulescens, Euphorbia rigida or Helictotrichon sempervirens.

Maintenance and Propagation

Cut flowering shoots down to the ground in late summer or autumn. The plants flower on last years shoots and should never be cut in spring since that will not only weaken them but will prevent flowering in that same year.

Propagate by basal cutting in spring or early summer. To prevent bleeding dip the cut surface in charcoal or lukewarm water.

Varities and Cultivars

  • 'Ascot Rainbow', variegates leaves that are often tinted red in winter
  • 'Black Bird', dark purple leaves

Poisonousness

All parts of the plants are extremely toxic. Contact with the sap my irritate the skin.

Aeskulap  Please read the health issues note

Pests and Diseases

The shrubs are not susceptible to pests or diseases. Even deer and snails aren't a problem.

Literature

  • Walter Erhardt, Erich Götz, Nils Bödeker, Siegmund Seybold: Der große Zander. Eugen Ulmer KG, Stuttgart 2008, ISBN 978-3-8001-5406-7. (Ger.)
  • Christoper Brickell (Editor-in-chief): RHS A-Z Encyclopedia of Garden Plants. Third edition. Dorling Kindersley, London 2003, ISBN 0-7513-3738-2.

Footnotes

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