Dracaena Dracaena is a genus of Liliaceae, and it is a subshrub, shrub or tree. The leaves are long sword-shaped, the petiole is short, there are often various spots and stripes, the top branches are dense, the flowers are small, and the panicles are panicles. Ovary 3-loculed, berries spherical. About 40 species, distributed in tropical and subtropical regions of Asia and Africa. There are five species in China, which are produced in the south.
General variety editor
Mainly divided into two ethnic groups:
There is a tree with a flat trunk and leathery leaves, which usually grows in arid semi-desert areas, commonly known as "Dragon Blood Tree".
The other is shrubs, thin stems and banded leaves, which generally grow in tropical rainforests and are usually used as ornamental plants.
The Latin name of Dracaena comes from Greek (Δ ρ? κ α ι ν α), which means "female dragon", includes about 40 kinds of plants, including trees, shrubs and succulents. According to the classification of APG II, they are classified as Acacia, and some are classified as Dracaenae or Agavaceae separately.
The genus mainly grows in tropical areas such as Africa and South Asia, and there is only one species in Central America. Pleomele has been incorporated into this genus, and Huwei Orchid is closely related to this genus, and some taxonomists have also incorporated it into this genus.
Its flowers are bisexual, small, perianth 6-lobed, panicle or spike raceme or compact spike; Fruit is a berry.
dragon tree
Dracaena Dracaena is a wide variety of foliage plants, and it is also the tallest and largest tree in the evergreen tree Dracaena Dracaena. The leaves are slightly branched, sword-shaped, dark green, and the top of the stem is clustered, 40 ~ 60 cm long and 3 ~ 4 cm wide.
Dracaena angustifolia
Dracaena is a small shrub with a plant height of 1 ~ 4m and a gray bark. The leaves are mostly clustered at the top of the stem, sessile, strip-shaped to oblanceolate, with a length of10 ~ 35cm and a width of1~ 5.5cm. The stem at the base is enlarged, and there are obvious ridges on the lower part of the back. Panicle is large, up to 60 cm long, with white fragrant flowers, spherical or 2-lobed berries and yellow.
Red dragon blood tree
Dracaena is a small shrub with a plant height of 160 ~ 200 cm. Vertices are branched. Leaves sessile, densely above the stem, inverted needle-like sword-shaped, about 60 ~ 100 cm long, 6 ~ 8 cm wide in the middle, leathery and hard, with concave longitudinal stripes on the leaf surface and purplish red edges.
Dracaena javanica
Dracaena javanica is a sub-shrub, with a plant height of 60 ~ 90 cm, many branches, and young branches blossom first. The leaves are densely clustered, oblique, oblong or oblong-lanceolate, acute, 7- 16 cm long and 3-5 cm wide in the middle, leathery and green, with veins on the back and thin and concave lateral veins. The petiole is 6 ~ 14 mm long and has longitudinal grooves.
dragon tree
Dragon blood tree:
Trees, sometimes branched. The leaves are clustered, elliptic-lanceolate, 30-90 cm long and 5- 10 cm wide, and the base is acute or acuminate, and the leaves are acuminate. The leaves are green or striped with various colors. Panicle,
The flower has 3 white bracts, and the tepals are yellowish and fragrant. The main species is Tilia amurensis: the leaves roll back, the ivory longitudinal stripes are not obvious, and the old leaves are yellow-green.
Color. Var.massangeana: The leaves are green with a yellow broadband in the middle. The yellow band of new leaves is obvious, and the old leaves gradually turn yellow-green. Dracaena scabra
(var.rothiana): Single stem with green or even light brown rings on it. The leaves are dense, sessile, long lanceolate, 50 ~ 60 cm long, with thick mesophyll, leathery, shiny, dark green and thin leaf margin.
Yellow, white or even white edges. Victoria variety: green leaves with broad yellow edges and silvery gray to milky white stripes, wavy.
Dracaena stellata
Stellaria involucrata:
Dwarf shrub with 3-4 leaves in rotation at each node, short petiole, leaf length 10- 12 cm, width 3.5-6.5 cm, irregular white and yellow spots on leaf hood, and leaves can secrete milk. Raceme flower
Preface, yellow-green flowers, fragrant, berry red. The cultivated variety is beautiful Florida (cv.florid
Beau-ty): The leaves are almost covered with milky white spots. There is a milky white stripe in the middle of the leaf. ...& gt& gt
Question 2: What is the use of Dracaena? It absorbs carbon dioxide to produce oxygen!
Question 3: What is the feng shui taboo of Dragon Blood Tree? What is the feng shui taboo of dragon blood tree? -Precious tree species, tropical native plants, which are not suitable for cultivation in most parts of China. The place where you can live should be an excellent living feng shui.
1, the tree of natural existence, a natural gift, no matter what tree species, take care of things with your heart. 2. Choose long-lived, evergreen and rare tree species. Nanmu, osmanthus tree and camellia oleifera can all be used. 3, surrounded by trees, noble people are determined.
About plant growth: planting trees and other green plants can test the feng shui of the house. Longevity, evergreen and rare tree species can be given priority. In areas with strong dragon spirit, trees and plants are full of vitality and lush foliage (in special areas, small shrubs of Vitex negundo have become big trees). In front of the house, especially in the back of the house, the more plants grow, the more attention should be paid to the natural selectivity of plants, which will not grow randomly, and the tall and long plants will not grow randomly. Especially tall and long-lived plants need special vitality to survive.
Life is yang, death is yin. Life is always the symbol of Yang's exuberance. It takes three generations to make a gentleman.
As long as the family is rich and the office is comfortable, don't ask about the feng shui of trees, what plants to plant, what tree species to plant, and where the trees grow. Trees that grow vigorously should be carefully protected from harm.
After decades of investigation, on-the-spot investigation and hearsay collection, my conclusions and experiences are as follows:
1, in front of the house, it is easy to plant trees, difficult to move, and difficult to chop down. In particular, the natural unknown death of plant population should be 100% catastrophic. If there are trees, we should cherish and protect them. Non-artificially cultivated and naturally grown trees and special plant populations can better reflect the natural wonders of nature, and we should also cherish and protect them seriously.
2. Where the topography and characteristics do not conform to the essentials of geomantic omen, there must be one or several tall trees or special plant populations with long growth years. It is true that when the trees are surrounded, there will be noble people.
3. The crown is tall, the root system is far-reaching, and the root system stretches for several kilometers and reaches hundreds of meters deep. These tall tree crowns and stretched roots can concentrate the vitality of the underground and the sky to a certain point, that is, the root, which is the so-called feng shui dragon spirit to attract, concentrate and close to a certain position.
I feel energetic, active and comfortable where there are trees and plants. Where there are no trees and skin grafts, it feels dull and stiff.
Question 4: What are the benefits of raising Dracaena at home? Dracaena is a kind of plant, which has its own advantages.
1, the garden utilization rate is very high. Dracaena is a beautiful and regular plant with colorful leaves. It is an excellent foliage plant for modern interior decoration. Small and medium-sized potted plants can decorate the study, living room and bedroom, and large and medium-sized plants can beautify and decorate the hall. Dragon's blood tree has strong adaptability to light and can be observed continuously for 2-4 weeks in a dark room. It can be kept in a bright room for a long time, and it is also the first-class product of furniture decoration. If different kinds of dragon's blood trees are bought home and put in different places,
2. Dracaena can be used for antibacterial and other medical functions, and Dracaena has the highest medicinal value. After being infected by Fusarium graminearum var. Fungi such as Dracaena yunnanensis can form plant defensins and produce red resin. This red resin is the traditional and important southern medicine in China-Dragon's Blood (Dragon's Blood), and flavonoids are its main components. A large number of studies have shown that these components have obvious antibacterial, antifungal, antioxidant, platelet aggregation inhibition, antithrombotic and fibrinolytic activities. Modern pharmacological research shows that dragon's blood can treat a variety of blood diseases, cardiovascular diseases, ulcers and inflammation, and has certain anti-aging and anti-tumor effects.
3. It also plays a unique role in geomantic omen. The gate to the south belongs to fire, so plants belonging to fire genus should be planted. Planting dragon's blood tree increases the positive energy of fire, which is beneficial to regulating the health of people's heart and stomach, and also has a regulating effect on some people's negative personalities such as introversion, timidity, lack of courage and lack of confidence in life.
The role of Dracaena Dracaena is far more than that. If you want to know more, you might as well buy a small dragon blood tree at the flower market after work, and start from a small place to reflect its unique functions.
Question 5: What is the scientific name of the so-called Dragon Blood Tree? Dragon Blood Tree Dragon Blood Tree Dragon Blood Tree is a kind of dragon blood tree in Liliaceae. Dracaena Dracaena is a Dracaena Dracaena of Liliaceae. Its leaves are sword-shaped, green, shiny and full of vitality. Today, it is known as the "new star of foliage plants"
Question 6: What does the flowering of Dracaena heralds? Hehe, it doesn't really mean anything. I really want to say that this is the result of your efforts, which can indicate that your wish for many years is about to come true.
Question 7: What's wrong with Dracaena? Dracaena acuta mainly damages the lower leaves. After tip infection, it spread to the inside of the leaf, and the lesion turned yellow and sank. There is a 1 brown line at the junction between lesions, and there are many small black spots on the lesions. Leaves often die from diseases, but the middle leaves only die from the tip, so it is called sharp blight. Affect viewing.
Rhizoctonia solani belongs to facultative parasite and often remains on the diseased leaves or fallen leaves of Dracaena. Spores of pathogens are released under high humidity conditions, and diseases are mainly infected and reinfected by wind and rain. Rain is an important condition for the onset, and it is easy to get sick if it rains for a long time.
Prevention and cure method
( 1)? Cultivate disease-resistant varieties or use disease-resistant varieties as grafting materials.
(2)? Careful maintenance, improve disease resistance.
(3)? Do everything possible to reduce injuries during transportation.
(4)? When necessary, spray 1: 1: 100 times bordeaux solution or 1000 times 53.8% Coside 2000 dry suspension solution and 3000 times 10% world high water dispersible granule solution.
Stem rot of Dracaena: After infection of Dracaena, the primary brown spots on the leaves mostly start from the edge of the leaves, and when the humidity is high, they quickly expand into strips or irregular dark brown water spots, and in severe cases, the leaves wither and die. Stem infection often invades from wounds, producing irregular black spots in phloem and gray-white to black mold layer. The phloem is peeling off and black rot is serious, and the damaged xylem is waterlogged and slightly brown. Bacteria quickly spread up and down after invading xylem, causing rot and producing a large number of black mold layers at the incision or wound.
Prevention and cure method
( 1)? Strict quarantine, found that the diseased plants were destroyed in time. Strict inspection should be carried out on Dracaena sinensis transported to the north to prevent diseased plants from being transported to the north.
(2)? Refrigerated containers should be used for long-distance transportation, and the temperature should be kept at 65438 05℃. And try to avoid man-made injuries during transportation.
(3)? Advocate greenhouse protection.
(4)? Pay attention to the discovery of fried moth larvae during the inspection, which should be eliminated as soon as possible. See this book for prevention and control methods.
(5)? Spraying 10% water dispersible granule 3000 times or 27% copper expensive suspension 600 times or 50% thiophanate-methyl suspension 800 times, 80% Heng Lv No.2 (Dofu Zinc) wettable powder 800 times, 50% clofenamic acid water soluble powder 1000 times, etc.
Question 8: What's the use of Dracaena? Dragon's blood tree likes light and bears drought. Put it in a bright and ventilated place on the balcony and water it thoroughly. If the soil is dry and not watered, extensive management can purify the air and absorb harmful gases.