Perovskia atriplicifolia
Silver Perowskie ( Perovskia atriplicifolia )
The silver Perowskie ( Perovskia atriplicifolia ) is a shrub with blue flowers of the mint family ( Lamiaceae). The natural range is in Asia. The species is often used as an ornamental shrub.
Description
The silver Perowskie is a 50 inch high shrub with rounded, rod- shaped, densely silvery -haired star shoots, which are filled with yellow glands. The leaves have a 4 to 6 mm long petiole. The leaf blade is 4 to 5 rarely 6 inches long, 0.4 to 0.9 cm wide, linear- lanceolate, simply pinnatisect, wedge base. The lobes are oblong to oval, obtuse, 2-4 mm long and 1 to 1.5 mm wide, sparsely stellate hairs and densely covered with yellow glands.
The flowers grow to two to six in Scheinwirteln arranged in loose, 10 to 15 inches long, cone-shaped panicles. The bracts are membranous, purple, about 0.7 mm long and 0.4 mm wide, ovate to oval, with white ciliated border. You fall off early. The flower stem is 1 to 1.5 mm long, densely hairy and hanging. The calyx is 5-6 mm long and 1.5 to 2.5 millimeters wide, purple at the base, densely white or purple rauhaarig and occupied with yellow glands. The margin is ciliated, the peak sparsely hairy to glabrous. The calyx tube is 4-5 mm long with a diameter of 1.5 to 2 millimeters. The upper calyx lip is 1 mm long and 2 mm wide and indistinct tridentate. The lower lip is slightly shorter than the upper one. The corolla is blue, about 1 centimeter long, bare and sparsely covered with glands. The corolla tube is 5-6 mm long and 2 mm wide. The upper Kronlippe is 3 to 3.5 millimeters long, striped 4 to 4.5 millimeters wide and dark purple. The lobes are oval to ovate, the middle lobe is about 1.5 mm long and 1 mm wide, the lateral lobes are 1 mm long and 1.5 mm wide. The lower lip is oblong - oval, about 3 mm long and 1 mm wide, entire and obtuse. When fruits are about 2 millimeters long and 1 millimeter wide nutlets formed with a blunt end. The silver Perowskie flowers from June to July and the fruits ripen from July to August.
Distribution and habitat requirements
The natural range is in Asia in Afghanistan and Iran, China in Xinjiang Province and Tibet Autonomous Region and in Pakistan. The silver Perowskie grows in steppes and dry forests on dry to fresh, mildly acidic to strongly alkaline, sandy, sandy- gravelly or sandy- loamy, fertile soil in sun to hot locations. The species is moisture and frost. It is the hardiness zone 7a associated with mean annual minimum temperatures -17.7 to -15 ° C.
System
The silver Perowskie ( Perovskia atriplicifolia ) is a species in the genus Perowskien ( Perovskia ) in the mint family ( Lamiaceae). There she is assigned in the subfamily Nepetoideae the tribe Mentheae. The species was first described in 1848 by George Bentham scientifically. The genus name Perovskia reminiscent of the Russian general and governor of the province of Orenburg LA Perovskij ( 1792-1856 ). The specific epithet is derived from atriplicifolia Atriplex, the generic name of the Report and of - folius, Latin for " flaky " from and describes the shape of the leaves, which resembles that of the Report.
Use
The silver Perowskie is often used because of their decorative and fragrant flowers as an ornamental shrub.