Chinese name: oleander
Nickname: Liu Tao, half-year red
Door: angiosperms
Category: Dicotyledonous plants
Objective: Gentiana scabra
Branches: oleander
Genus: oleander
Latin name: oleander
Color: red (natural), white (artificially cultivated)
Evergreen shrub, 5 meters high, watery and hairless. 3-4 impellers, opposite to the lower part of the branch, narrowly lanceolate, long11-kloc-0/5 cm, wide 2-2.5 cm, and light green at the lower part; Lateral veins are flat, dense and parallel. Cymes are terminal; Calyx erect; Corolla deep red, fragrant, double; Corona scaly, apical tear. Follicles are oblong, with a length of 10-23 cm and a diameter of 1.5-2 cm. The top of the seed has yellow-brown seed hair. Originally from Iran, it is now widely planted in tropical and subtropical regions; It is cultivated in all provinces and regions of China. Stem bark fiber is an excellent blended raw material and can also be used as a tonic; Roots and bark contain cardiac glycoside and phthalein crystals and a small amount of essential oil; Stems and leaves can be used as pesticides, and stems and leaves and flowers are toxic. The milky juice it secretes contains a toxic substance called oleanolin, which will be poisoned if eaten by mistake. Stem bark fiber is an excellent blended raw material; Leaves and stem bark are highly toxic, so use them with caution when decocting or grinding. It can strengthen the heart, induce diuresis, relieve asthma and relieve pain. Used for heart failure, wheezing and coughing, epilepsy, traumatic injury and swelling and pain. It can also be used to make pesticides, which is fatal to people and animals. This species has strong resistance to toxic gases such as sulfur dioxide and chlorine. Roots and bark contain cardiac glycosides, phenolic crystals and a small amount of essential oil. Growing environment: all-round cultivation, more common in parks, factories and mines, street greening. Gardens all over the country are often planted as ornamental plants. Picking: Picking leaves in summer and autumn, fresh use or drying. Manifestation: Bitterness and cold have great poison. Flowers are like peaches, leaves are like bamboo, and the seasons are evergreen. From spring to summer to autumn, flowers fall in bloom, one after another. Facing the spring breeze, braving the rainstorm, facing the scorching sun, I spit and fight for fragrance. The ancestors of oleander were in India and Iran. It is a short shrub with many branches on the trunk and branches, and the smallest branch is green. The leaves of oleander grow very interesting. Three leaves form a ball, around the branches, and grow outward from the same place. The leaves of oleander are long and lanceolate, and the edges of the leaves are very smooth. The main vein on the leaf extends from the petiole to the tip of the leaf, and many branches are born from the main vein, which are neatly arranged horizontally. There is a thin layer of wax on the leaves of oleander. This layer of wax can keep moisture and heat for leaves and make plants resist the cold. Therefore, oleander is not afraid of cold, and its green posture remains unchanged in winter. The flowers of oleander are very fragrant. Flowers are concentrated on the branches, gathering together like an open umbrella. The flowers of oleander are funnel-shaped with overlapping petals. There are three kinds of oleanders: red, yellow and white. Among them, red is its natural color, and "white" and "yellow" are new varieties cultivated artificially for a long time.
country of origin
Iran, India and other countries and regions. Now it is widely planted in subtropical and tropical regions. The introduction of China began in the Song and Yuan Dynasties and was cultivated in all provinces and regions. Like light, like warm and humid climate, not cold-resistant, avoid water stains, resistant to a certain degree of air drying. It is suitable for neutral soil with good drainage and high fertility, and can also adapt to slightly acidic and alkaline soil.
Large evergreen shrub of oleander, 5 meters high and hairless. 3-4 impellers, opposite to the lower part of the branch, narrowly lanceolate, entire, leathery, long11-15cm, wide 2-2.5cm, and light green at the lower part; Lateral veins are flat, dense and parallel. Summer flowers, pink or white flowers, in terminal cymes; Calyx erect; Corolla deep red, fragrant, double; Corona scaly, apical tear. Follicles are oblong, with a length of 10-23 cm and a diameter of 1.5-2 cm. The top of the seed has yellow-brown seed hair. The stem is erect and smooth, and it is a typical branch of trigeminal nerve. Three leaves, at least four leaves and two leaves, linear-lanceolate to oblong-lanceolate, all round, leathery, with bright leaves and pinnate lateral veins. Cymes are terminal, with funnel-shaped corollas, red, yellow and white, single, semi-double or double petals, fragrant, and pods are long and cylindrical. The flowering period is 6-65438+ 10 month, the fruiting period is 65438+February and the following year is 65438+ 10 month. Common cultivated varieties are: oleander with single petal and white flowers; Double oleander, double safflower; Light yellow oleander with a light yellow flower.