Hydrangea aspera
Rough hydrangea ( Hydrangea aspera )
The Rough hydrangea ( Hydrangea aspera ), also referred to as Fellhortensie or Samthortensie, is a shrub or rarely a small tree from the family of hydrangea plants. It is used because of its flowers as an ornamental plant. The natural range is in Asia, ranging from the temperate to the tropical zone.
Description
The Rough hydrangea is a respect habit, leaf size, leaf shape and pubescence very variable Art makes you 1-4 rarely to 10 m high, sparsely branched shrubs or small trees with terete or slightly quadrangular, densely yellow- or gray-white hairy branches. The bark is brown. The leaves have a 1 to 4.5 cm long, densely hairy or bald striegel stem. The leaf blade is simple, 5-25 cm long and 2-8 cm wide, lanceolate acuminate to ovate to elliptic -oblong, long, with broadly wedge -shaped to rounded base and serrated to double serrated leaf edge. The upper leaf surface is sparse to dense striegel hairy, the underside gray-white pubescent to densely villous. There shall be six to ten pairs of nerves.
The flowers are arranged in umbrella-shaped, 8-25 cm wide cymes with densely gray-yellow pubescent branches. The sterile flowers are 2-6 inches wide. They have four or five inches long and 1 to 3.3 0.9 to 2.7 cm wide, greenish white, pink or red, broadly ovate, obovate or roundish sepals with sharply serrated, notched or whole margin. The numerous fertile flowers have a 1 to 1.5 millimeters long, bell - to dome-shaped calyx tube with 0.5 to 1 mm long, broadly triangular to ovate - triangular calyx teeth. The petals are 1.5 to 2.5 millimeters long, blue -violet to purple, oblong- ovate to ovate with truncated base. The ten stamens are of unequal length, the anthers are about 0.5 millimeters in size and roundish. The ovary is inferior, the two or three pens are bent back, the scars somewhat enlarged. The follicles are urn -shaped. They have a diameter of 3 to 3.5 mm with semi- pointed base and truncated tip. The seeds are 0.4 to 0.5 millimeters in size, brown, fusiform, elliptical or roundish, slightly compressed and secured at both ends with about 0.2 millimeters long wings. The species flowers from July to September and the fruits ripen from September to November.
Distribution and ecology
The natural range extends from the temperate to the tropical zone of Asia. One finds the way into the Chinese provinces of Gansu, Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Shaanxi, Yunnan and Sichuan, Taiwan, Bhutan, in the Indian states of West Bengal and Sikkim, Nepal, Myanmar, Vietnam, and the Indonesian islands Java and Sumatra. It grows in biodiversity-rich forests at altitudes of 700-4000 meters on moderately dry to moderately moist, slightly acidic to alkaline, nutrient-rich soils in light to partial shade. The species is tolerant of urban climates, but only moderately frost hardy and avoids sandy and clayey subsoil.
System
The Rough hydrangea ( Hydrangea aspera ) is a species of the genus Hydrangea ( Hydrangea ) in the family of hydrangea plants ( Hydrangeaceae ), subfamily Hydrangeoideae, Tribe Hydrangeae. It was first described by David Don in 1825.
Use
It is used for their decorative flowers as ornamental tree. A variety often used is ' macrophylla ', a little branched, about 2 to 3 meters tall shrub with thick stems and usually unbranched branches. The Blättspreiten are 15 to 25 inches long and egg-shaped. The lower leaf surface is covered with graufilzigen, curled or upright hair. The flowers are arranged in 25 centimeters wide, flachkugeligen cymes. The sterile flowers are white, the fertile pale purple. The species flowers from July to August.