Acer opalus

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Acer opalus Mill.

Aceraceae

Life form: tree

Exposure: sun   6

Moisture: dry bis Moisture: moderately moist

Soil: sandy loam - Soil: gritty loam

Arrangement: opposite
Leaves: decidious

Shape: palmately lobed

Division: simple

    

Shape: five-stellate
Fruit: schizocarp

3A / f8da21 

Inflorescence: umbel

Petals: not specified
Habit: pendant

Canopy: rounded to broadly spreading

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Rosopsida
Subclassis:
Rosidae
Superordo:
Rutanae
Ordo:
Sapindales

Acer opalus is a tree.

Naming

Acer opalus was described by Philip Miller in 1768. The name is considered as validly published.

Taxonomy

Acer opalus is a species in the genus Acer which contains approximately 230 to 296 species and belongs to the family of the Aceraceae (Maple Family). The type species of the genus is Acer pseudoplatanus.

Characteristics

Acer opalus - habitus

Growth

The trees have a rounded to broadly spreading canopy and reach heights of 12 to 15 metres. The plants reach a width of 5 to 10 metres.

Wood and Bark

The bark is brown.

Leaves

Acer opalus is deciduous. The green, simple leaves are opposite. They are palmately lobed, petiolate and have palmate venation. They turn an attractive yellow in autumn.

Flowers and Fruits

Acer opalus produces umbels of pendant, yellow five-stellate flowers from April to May.

The trees produce schizocarps.

Root System

Distribution

Acer opalus is native to France, Central Europe, the Iberian Peninsula and the Apennine Peninsula.

Cultivation

The trees prefer a sunny situation on dry to moderately moist soil. The substrate should be sandy-loamy or gritty-loamy soil with a pH between 8 and 10. They tolerate temperatures down to -23°C (USDA zone 6).

Uses

Maintenance and Propagation

Cultivars

Pests and Diseases

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.

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