Rosa gymnocarpa

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Rosa gymnocarpa Nutt.

Rosaceae

Life form: shrub

Exposure: sun - Exposure: half shade   7

Moisture: dry bis Moisture: moderately moist

Soil: sandy loam - Soil: gritty loam

Arrangement: alternate
Leaves: decidious

Shape: elliptic

Division: imparipinnate

Shape: five-stellate
Fruit: hip

82C / 7b4c9a 

Inflorescence: not specified

Petals: not specified
Habit: not specified

Growth form: not specified

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Rosopsida
Subclassis:
Rosidae
Superordo:
Rosanae
Ordo:
Rosales

Rosa gymnocarpa, commonly known as wood rose, is a shrub.

Naming

Taxonomy

Rosa gymnocarpa is a species in the genus Rosa which contains approximately 180 to 623 species and belongs to the family of the Rosaceae (Rose Family).

Characteristics

Growth

The comparatively long-lived shrubs reach heights of 90 centimetres, they have a semi-erect habit and produce multiple stems. The main growing season is in spring and summer.

Wood and Bark

Leaves

Rosa gymnocarpa is deciduous. The dark-green, imparipinnate leaves are alternate. The elliptic leaflets are serrate and petiolate.

Flowers and Fruits

Rosa gymnocarpa produces showy purple five-stellate flowers from June to July.

From summer to autumn the shrubs produce ornamental red hips that are persistent on the plant.

Root System

Distribution

Rosa gymnocarpa is native to British Columbia, the Northwest of the US, the Rocky Mountains and California.

Cultivation

The shrubs prefer a sunny to half-shady situation on dry to moderately moist soil. They prefer sandy-loamy or gritty-loamy soil with a pH between 6 and 7,8. The plants need a soil depth of at least 36 centimetres for good growth. They tolerate temperatures down to -18°C (USDA zone 7) and need a frost-free period of at least 20 weeks.

Tolerance of special soil conditions

  • none: soil salinity, anaerobic soil
  • medium: drought, calcareous soil

Uses

The ornamental value of Rosa gymnocarpa lies especially in the attractive autumn aspect and its fragrance. The recommended planting distance is 1,5 to 2,4 metres. Suited for rockeries.

Maintenance and Propagation

Propagate by sowing. The seeds require vernalization. Also by cuttings.

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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