Rhododendron Vazeya [2] ( lat. Rhododēndron vasēyi ) - plant , deciduous shrub; species of rhododendron genus. It is used as an ornamental garden plant, as well as in breeding programs for the production of decorative rhododendron varieties . The specific Latin name is given in honor of the American botanist George Vosy and his son GR Vasey , who discovered the plant in 1878 [3] [4] .
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Rhododendron vaseyi A. Gray , 1879 | |||||||||||||||||||||||||
Spread
USA ( North Carolina ). Mountain swamps, rocky peaks, steep slopes in deciduous and coniferous forests; at altitudes of 900–1800 meters above sea level [5] .
Description
Deciduous shrub, height 2.5-5.5 m. Crown shirokoraskidistaya. The bark is smooth with vertical grooves. Young shoots slightly pubescent, reddish-brown, later the pubescence disappears, in the second year grayish-brown.
Leaves 2.3–17 × 0.8–5.5 cm, elliptical or oblong-elliptical, pointed, with a wedge-shaped base, slightly wavy on the edge, ciliate, dark green above, lighter below, bare on both sides, scarlet in autumn. Petioles 3-10 mm long.
Inflorescence bears 5-15 flowers. Pedicels 5-26 mm.
Flowers open before the appearance of leaves, fragrant. The corolla is 3-5 cm long, slightly bilabiate, from pale to dark pink, sometimes white, with orange-brown or red spots on the upper lobes, widely bell-shaped. The cup is small. Stamens (5) 7, length not identical 12–38 mm, threads bare. Pinkish anthers . Ovary is glandular. The bar is bare, longer than the stamens.
Karyotype : 2n = 26
It blooms in spring. Decorative during flowering.
Fruits - boxes [6] [5] [2] .
In culture
In culture since 1880. One of the most highly decorative deciduous rhododendrons.
In the climatic conditions of Latvia, the height at the age of 20 is about 2.5 m [2] . Annual growth of 5-6 cm. Lives over 30 years. Light-requiring Prefers slightly acidic, gravelly, moist soil. It is winter-hardy in central Russia . Planted in groups on the lawn, on the edge of light-coniferous forests, together with late-flowering and evergreen rhododendrons.
In GBS since 1964. Height 0.7 m, crown diameter 60 cm. It blooms from 30 years old, annually and always abundantly, from 21.V ± 3 to 6.VI ± 3 for 17 days. The fruits ripen in September. Winter hardiness I (II). Approximately 27% of rooted cuttings in the processing of root stimulants.
Seeds are stored in paper bags or tightly sealed glass jars in a dry, unheated room. At the same time, germination lasts up to 3 years. Germination 84-87%. Seeds do not need stratification . Sowing is carried out in December-February in greenhouse conditions at 18 - 20 ° C without incorporation into the soil [6] .
Under the conditions of the Nizhny Novgorod region, winter hardy . In harsh winters freeze slightly the ends of shoots. Seeds ripen [7] .
According to the American Rhododendron Society, it can withstand winter temperatures as low as -26 ° C [8] .
Diseases and pests
Notes
- ↑ About the conditionality of specifying the class of dicotyledons as a higher taxon for the group of plants described in this article, see the section “APG Systems” of the article “Dicotyledons” .
- ↑ 1 2 3 Kondratovich R. Rhododendrons . - Riga: Zinatne, 1981.
- ↑ Rhododendron vaseyi . Archived October 26, 2011. Center for Plant Conservation.
- ↑ Gray, A. Botanical Contributions. // Proceedings of the American Academy of Arts and Sciences . - 1880. - Vol. 15 (1). - P. 48-49.
- ↑ 1 2 Rhododendron vaseyi . efloras.org. The appeal date is March 1, 2015.
- ↑ 1 2 Rhododendron . Encyclopedia of ornamental garden plants. The appeal date is March 1, 2015.
- ↑ Mishukova I.V., Hrynova T.R. Results of the introduction of rhododendrons at the Research Institute of Botanical Garden of Nizhny Novgorod State University // Bulletin of Nizhny Novgorod University. N.I. Lobachevsky. - 2014. - № 3-3 .
- ↑ Description of Rhododendron vaseyi . American Rhododendron Society. The appeal date is March 1, 2015.