China, Taiwan Province Province, Fujian Province and Guangdong Province have introduced and cultivated them for viewing. Native to South America, it is usually planted in tropical and subtropical regions. These flowers are very beautiful.
Chinese name Zhu
Latin scientific name Calliandra haematocephala? Hask.
Also known as acacia, Acacia americana, commonly known as "red velvet ball"
plant kingdom
Door? Vascular endothelial cell
Outline? Magnolia
Primitive perianth subclass
Rosales
Rosesuborder
bean family
Mimosinae
Genus? Rosaceae
Kind? bright red
Distribution area? Native to tropical and subtropical America, it is widely cultivated in tropical and subtropical regions of the world.
Name and year. , 1855
morphological character
Zhu (1 1)
Deciduous shrubs or small trees, 1-3 meters high; Branches spread, branchlets are cylindrical, brown and rough. Stipules are ovate-lanceolate, with bipinnately compound leaves, and the total petiole length is1-2.5 cm; Feather 1 pair, 8-13cm long; Leaflets 7-9 pairs, obliquely lanceolate, 2-4 cm long and 7- 15 mm wide. The middle and upper leaflets are larger, the lower part is smaller, the apex is blunt and small, the base is oblique, and the edge is pubescent; Midrib slightly on the upper edge; The petiole is only 1 mm long.
The head is axillary, with a diameter of about 3 cm (even filaments), with about 25-40 flowers, and the total pedicel length is 1-3.5 cm; Calyx campanulate, ca. 2 mm long, green; Corolla tube is 3.5-5 mm long, light purplish red, with 5 lobes at the top, and the lobes are reflexed, about 3 mm long and glabrous; Stamens protruding from corolla, very obvious. Staminal tube is about 6 mm long, white, with a drill-like appendage at the mouth. The upper free filament is about 2 cm long and dark red.
The pod is linear oblanceolate, 6- 1 1 cm long and 5- 13 mm wide, dark brown, cracking from top to bottom along the suture line when mature, and the fruit flap is everted; 5-6 seeds, rectangular, 7- 10 mm long, 4 mm wide, brown. Flowering in August-September; The fruiting period is 10- 1 1 month. ? [2]?
distribution range
China, Taiwan Province Province, Fujian Province and Guangdong Province have introduced and cultivated them for viewing. Native to South America, it is usually planted in tropical and subtropical regions. ? [2]?
Zhu distribution diagram
Growth habit
Rosaceae is a tropical flower, which likes sunshine, warm and humid climate, is not cold-resistant, and is suitable for deep, fertile and well-drained acidic soil. ? [3]?
breeding method
Cutting propagation method
Generally speaking, Rosa laevigata is propagated by cutting. In spring, strong branches with a length of 20 cm can be cut, and the seedbed temperature should be kept at 15-28℃. Cuttings should be cut with 1-2-year-old branches with rich tissues, each section is about 15-500 p-xylene, and can be inserted into wet sand bed for shading or full light spraying.
sow seeds
The seeds were collected in June 5438+ 10, dried and stored until sowing in the following spring. Soak the seeds with 60℃ hot water before sowing, and change the water 65438 0 times a day. On the third day, the seeds are taken out 1 week, and germinate 5-7 days after sowing. Trim the side branches in time when raising seedlings to ensure that the trunk is straight. Transplanting should be carried out before bud germination, but when transplanting trees, brackets should be set to prevent them from being blown down by the wind. Ditching and fertilizing around the trunk in winter 1 time. ? [3]?
cultivation techniques
pot culture
Family potted plants should choose garden soil mixed with some river sand as pot soil and put it in Nanyang terrace for planting and viewing. The optimum temperature for its growth is 23℃~ 30℃, and the temperature is kept at 65438 05℃ ~ 65438 08℃ during overwintering, which can avoid the wind and reduce defoliation. Generally, it can be watered when the surface layer of the basin soil is 1 cm deep, when the basin soil is half dry in winter, and the compound fertilizer can be applied 1 time every month from spring to autumn. ? [3]?
Fecal fluid
Seedlings need more water, so pay attention to irrigation during the growing period. Potted plants are prone to drought and water shortage, and their leaves wither, so attention should be paid to replenishing water. Fertilization can use natural organic fertilizer or compound fertilizer once a month, and more phosphorus and potassium fertilizers should be applied during flowering. There should be plenty of sunshine in the cultivation place, and poor flowering in the hidden place.
decrease
When the trunk of a young tree is more than 2 meters high, it can be trimmed. Choose three lateral branches scattered up and down as the main branches and use them to expand the crown. In winter, three main branches are cut short, and several lateral branches are cultivated on each main branch, which are scattered and occupy a certain space. When the crown extends too far and the lower part is bald, it should be retracted in time to change the head and cut off the dead branches. ? [3]?
control of insect
There are mainly canker diseases, and 50% degerming agent can be sprayed for 800 times. Insects are harmful to longicorn beetles and psyllids. Use kerosene 1 kg and 80% dichlorvos EC 50 g to kill longicorn beetles, and use 40% dimethoate EC 1500 times to spray psylla. ? [3]?
Main value
Medicinal bark: diuretic and repellent. ? [4]?
enjoy
Rosa laevigata is an excellent ornamental tree species with bright colors, which is suitable for planting in garden green space. The flowers and leaves of Rosa laevigata are bright green, bright red and fluffy, which is very lovely. It is a flowering shrub with high ornamental value and many ornamental varieties. Feasible layout of potted plants and park greening. This tree has a graceful posture and elegant leaves. In midsummer, the velvet flowers are full of trees, and the color and fragrance are overflowing, which can form a soft and comfortable atmosphere. Should be used as shade trees and street trees, planted in forest margins, houses, lawns, hillsides and other places. It is a good ornamental tree species for street trees, shade trees, surrounding greening and garden embellishment. The canopy is open, cool and quiet in summer, the pinnate compound leaves are open in the daytime and closed at night, which is very strange. The pink velvet flowers in summer are beautiful and suitable for scattered planting in Chi Pan, waterfront, river banks and streams. ? [3]?
plant culture
Zhu's flower language and symbol represent the meaning of unrestrained, heroic and festive. ? [5]?