Rhododendrons, shrubs or trees, sometimes dwarfed as cushions, sit-down or epiphytic; plants are glabrous or covered with various coats or scales. Leaves Evergreen or deciduous, semi-deciduous, alternate, full margin, rare and inconspicuous small teeth. Flower buds are scaled by most morphologically variable size buds.
<h2 class="pgc-h-arrow-right">
</h2>
Rhododendron: significant, small to large, usually arranged in umbel-shaped, general, or short inflorescences, rare single flowers, usually apical, rare axillary; calyx: 5 or 6 or 6 lobes or rings are particularly pronounced lobes, survival; corolla: funnel-shaped, bell-shaped, tubular or tall disc-shaped, neat or slightly symmetrical, 5 or 6 or 8 lobes, lobes covered with tiles within the buds; stamens: 5-10, usually 10, dilute 15-20 (or 27), corolla base, no appendages to the anthers, The apical or slightly skewed pores; the disc is somewhat thickened and significant, 5-10 (or 14) lobes; Ovary: usually 5 chambers, rarely 6-20 chambers, the flower column is slender, straight or thick and short, curved and arched, and the colon is preserved. Fruit: The capsule cracks from the top to the lower interventricular, the petals are woody, and the cracking consequences of the cracking of the thin and thin ones are more or less twisted. Seeds: majority, small, spindle-shaped, membranous, thin wings, or seeds with distinct or inconspicuous fin-like wings at both ends, or wingless but with narrow or caudal appendages at both ends.
It should be noted that there are about 60 species of poisonous plants in China's rhododendron genus, most of which are unique to China, and most of them are extremely toxic, often causing poisoning of people and animals. The main poisonous species are sheep heel, large white flower rhododendron and cowhide tea, etc., the symptoms of human accidental eating poisoning are mainly nausea, vomiting, blood pressure drop and respiratory depression, generally due to respiratory failure and death. Although some species have not found harm to humans and animals, they are not common, but the toxicity test shows strong toxicity, mice intraperitoneally injected with water or chloroform and other solvents of crude extracts, in less than 1000mg / kg dose can cause the subject animals to be seriously poisoned or immediately dead. In addition, many plants have been found to contain argylvic toxin1 or its similar highly toxic components, which also have certain toxicity. In addition, from some of the highly toxic plants such as rhododendron macrophylla and sheep heel, a number of components are also distinguished, and although their toxicological effects are similar to quinoa toxins, they are not the same and need to be studied in depth. Lutein 1 is a representative toxin of this genus and family, with a variety of complex physiological effects, and is a cardiac-nervous system poison.
<h3 class= "pgc-h-arrow-right" > medicinal value</h3>
Its flowers, leaves and roots can be medicated, the taste is flat and acidic, and it can activate blood, stop bleeding, and dispel rheumatism. Dosage is 5-10 g. If menstruation is not adjusted, 10 grams of rhododendron flowers, 5 grams of moon flowers, and 20 grams of motherwort can be decocted in water. Bronchodilator bleeding can be decocted with 10 grams of rhododendron, 30 grams of crane grass, 10 grams of white mustard, and 5 grams of licorice. Rheumatoid arthritis can be decocted with 10 grams of rhododendrons, 10 grams of self-defense, 15 grams of cangshu, and 10 grams of amaranth. While treating gangrene, flowers and leaves can be mashed externally. Rhododendron root, the name of Chinese medicine. It is the root of rhododendron rhododendron simsii Planch. It is found throughout the south of the Yangtze River Basin, east to Taiwan, west to Sichuan and Yunnan. It has the effect of stopping bleeding, reducing swelling and relieving pain. It is often used for menstrual irregularities, vomiting blood, blood in the blood, blood in the stool, leakage, dysentery, abdominal pain, rheumatic paralysis, bruises.