Acer opalus Mill.
Acer opalus is a tree.
Acer opalus was described by Philip Miller in 1768. The name is considered as validly published.
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.
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.
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.
Acer opalus is native to France, Central Europe, the Iberian Peninsula and the Apennine Peninsula.
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 -23Â°C (USDA zone 6).
Maintenance and Propagation
Pests and Diseases
- Walter Erhardt, Erich GÃ¶tz, Nils BÃ¶deker, Siegmund Seybold: Der groÃe 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.