Cotoneaster frigidus
Tree cotoneaster ( Cotoneaster frigidus )
The Tree cotoneaster ( Cotoneaster frigidus ) is up to 10 meters tall shrub or tree with bright red fruits from the group of pome fruit crops ( Pyrinae ). The natural range of the species is located in the Himalayan region in Asia. It is sometimes used as an ornamental plant.
Description
The Tree Cotoneaster is a deciduous or evergreen, up to 10 meters tall shrub or small, broad crown with wide overhanging branches. The branches are reddish brown to gray-brown, initially pubescent tomentose and later glabrous. The leaves are spirally other two lines on upright stems. The petiole is hairy 4-7 millimeters long and tomentose. The stipules are brown, linear - lanceolate, 4-6 mm long and slightly tomentose hairy. The leaf blade is simple, narrowly ovate to ovate - lanceolate, 3.5 to 8 rarely to 12 centimeters long and 1.5 to 3 to 4 inches wide rarely, with acute or obtuse sometimes stachelspitziger blade tip and wedge-shaped or broadly wedge -shaped base. The upper leaf surface is dull green, usually glabrous with slightly indented leaf veins; the bottom is initially pubescent tomentose and gradually glabrous with prominent veins.
The flowers grow in 4 to 6 centimeters long and 3-5 centimeters in diameter umbrella- end of 20-40 flowers with densely tomentose hairy inflorescence stem. The bracts are linear - lanceolate, hairy 3 to 5 millimeters long and tomentose. The flower stalks are also hairy tomentose and 2 to 4 millimeters long. The flowers have a diameter 6-7 mm. The flower cup is bell-shaped or cylindrical, short and outside densely pubescent tomentose. The sepals are triangular, with blunt tip, 1 to 1.5 mm long and 1.5 to 2 millimeters wide. The petals are horizontal. They are white, hairy upper side glabrous or finely, broad - ovate or rounded, 3 to 3.5 mm long and almost as wide, with obtuse or rarely ausgerandeter top and nailed wide basis. The top is finely hairy at the base. The 18 to 20 stamens are slightly shorter than the petals. The tip of the ovary is densely pubescent tomentose. The two free-standing style shorter than the stamens. The bright red and elliptical fruits have diameter of 4 to 5 millimeters. The fruit of two nuclei are formed. The Tree cotoneaster flowers in March-May, the fruits ripen from September to October.
The chromosome number is 2n = 34
Occurrence and habitat requirements
The natural range is located in the Autonomous Region of Tibet, Bhutan, in the Himalayan region of India and Nepal. The Tree Cotoneaster grows in steppes and dry forests in 2800-3300 meters above sea level on dry to fresh, mildly acidic to strongly alkaline, sandy, sandy- gravelly or sandy- loamy, fertile soil in light to partial shade. The type is heat -loving, sensitive to moisture and moderately frost hardy.
System
The Tree cotoneaster ( Cotoneaster frigidus ) is a species in the genus Zwergmispeln ( Cotoneaster ). It is assigned in the rose family ( Rosaceae ) of the subfamily Spiraeoideae, Tribe Pyreae the subtribes of pome fruit crops ( Pyrinae ). The genus name Cotoneaster is derived from the Latin " malum cotoneum " for the quince ( Cydonia oblonga ). The ending " aster " is a Vergröberungsform for groups of plants that are considered in comparison with similar groups as inferior. The specific epithet frigidus also comes from the Latin, meaning "cold" and refers to the preferred location in the cold high mountains.
Use
The Tree Cotoneaster is sometimes used because of their remarkable fruits as ornamental tree.