Begonia oxyanthera

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Begonia oxyanthera Warb.

Begoniaceae

Life form: climber
Usage: ornamental plant

Exposure: sun - Exposure: half shade   10

Moisture: moderately moist bis Moisture: moist

Soil: sandy loam

Arrangement: alternate
Leaves:

Shape: ovate-lanceolate

Division: simple

Shape: not specified
Fruit: loculicidal capsule

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Inflorescence: cyme

Petals: not specified
Habit: not specified

Growth form: not specified

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Rosopsida
Subclassis:
Dilleniidae
Superordo:
Violanae
Ordo:
Begoniales

Begonia oxyanthera is a climber.

Naming

Begonia oxyanthera was described by Otto Warburg in 1895. The name is considered as validly published.

Taxonomy

Begonia oxyanthera is a species in the genus Begonia which contains approximately 1545 to 1724 species and belongs to the family of the Begoniaceae (Begonia Family). The type species of the genus is Begonia obliqua.

Characteristics

Growth

The climbers reach heights of 6 to 9 metres.

Leaves

Begonia oxyanthera has simple leaves that are alternate. The leaves are ovate-lanceolate, entire and petiolate.

Flowers and Fruits

Begonia oxyanthera produces cymes of white flowers.

The climbers produce loculicidal capsules.

Root System

Distribution

Begonia oxyanthera is native to Cameroun and Equatorial Guinea.

Cultivation

The climbers prefer a sunny to half-shady situation on fresh to moist soil. The substrate should be sandy loam. They tolerate temperatures only above at least 1°C (USDA zone 10). Under glass use potting compost with added sand.

In summer the plants prefer moderate humidity, protection from direct sunlight. Tolerance of special soil conditions

  • none: waterlogging

Uses

Suited for hanging baskets and for conservatories, as well as suited as indoor plant.

Maintenance and Propagation

  • Repot as necessary in spring.
  • For healthy growth apply a compound fertilizer monthly during growth.
  • Water moderately in summer, give little water in winter.
  • temperature in summer should be 19 to 23°C, in winter should be 19 to 23°C.


Cultivars

Pests and Diseases

White spots on flowers and leaves in combination with buds that do not open indicate an infestation with thrips. These insects can be controlled by improving ventilation and by watering regularly as well as by using an insecticide or biolocial pest control (predatory mites).

Waxy fibres and honeydew on leaves and shoots indicate an infestation with mealybugs. Apply insecticide or control biologically with predatory ladybirds.

Small dark-coloured beetles feeding on the plants are very likely vine weevils. Their larvae feed on seedling, cuttings, roots and tubers. Handpick and destroy pests and improve hygiene. Additionaly use insecticide or biological control (nematodes).

Honeydew, galls and distorted leaves are a sign for an infestation with aphids. Use an insecticide or control biologically , e.g. with parasitic wasps or predators such as Aphidoletes aphidimyza.

Rot on leaves, shoots, flowers or fruits indicated an infection with grey mould (botrytis). Remove and destroy affected plants. Apply fungizide. Improve ventilation and hygiene and avoid injuring the plants to prevent infections.

A powdery white coat on the plants indicates an infection with powdery mildew. Remove affected plants and apply a fungicide. To prevent infection improve ventilation, keep the roots moist and do not water the plants from above.

Damaged roots, withering, decolouration and dieback of leaves and shoots may be caused by stagnant moisture, fungi or bacteria. Remove affected plants. Prevent by improving hygiene and drainage.

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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