Yidu Red Mushroom

Yidu Red Mushroom

　　Chinese Name: 红菇 (Red Mushroom)

　　　　Latin Name: Russula sp. (Zhenghonggu, or True Red Mushroom, is a new species)

　　　　Common Names: Zhenghonggu (True Red Mushroom), Zhenhonggu (True Red Mushroom), Dahonggu (Big Red Mushroom), Hongzhujun (Red Camphor Mushroom), Dahongjun (Big Red Fungus), Dazhugu (Big Red Mushroom)

　　　　Classification: Phylum Fungi, Class Basidiomycetes, Order Agaricales, Family Russulaceae

　　　　Morphological Features: Cap width 4–9 cm, initially convex to flattened or slightly depressed in the center, sticky when young, dull or velvety, dark red to dark (blackish) red in the center, lighter deep red at the edges, often with fine transverse lines on the cap margin. Flesh is white, thick, often eaten by insects. Good flavor and aroma. Gills are white, turning pale yellow with age, may have reddish tinge near the cap edge, moderately dense to somewhat sparse, often forked, with cross veins between gills. Stipe 3.5–5 cm long, 0.5–2 cm thick, white, sometimes light coral-red on one side or at the base, cylindrical or tapering downward, solid or soft. Spore print white or very pale grayish-white. Spores colorless, nearly spherical, with tiny warts, 7.5–9 × 7.3–8.1 micrometers. Cystidia nearly fusiform, 51–85 × 8–13 micrometers.

　　Ecological Habits: Grows in clusters or singly on the forest floor during summer and autumn. It is a mycorrhizal fungus that symbiotically associates with the roots of trees such as paper mulberry and oak.

　　Nutrition and Uses

　　　　Red mushrooms contain five types of polysaccharides, 16 amino acids, and 28 fatty acids. The polysaccharide content is about 2.47%, with monosaccharides and oligosaccharides making up 33.9% of the total sugars. Amino acid content is 14.7%, including 54.4% essential and semi-essential amino acids. Dried red mushrooms contain 15.7g of protein, 63.3g of carbohydrates, 23mg of calcium, 500mg of phosphorus, 3.54mg of vitamin B2, and 42.3mg of niacin per 100 grams.

　　　　Known as the “King of Mushrooms,” it is a natural nutritional delicacy. With a unique flavor, it is fragrant, delicious, and sweeter than any other mushroom. It contains various essential amino acids and offers benefits such as nourishing yin, tonifying kidneys, moistening lungs, promoting blood circulation, improving brain function, and enhancing complexion. Regular consumption can strengthen the body and prolong life. It also contains polysaccharide-based anti-cancer compounds that improve blood circulation, lower cholesterol, inhibit cancer cell metastasis, and provide certain therapeutic effects for acute myelitis of the spinal cord and optic nerve. It helps treat back and leg pain, numbness in hands and feet, joint discomfort, limb spasms, and conditions like anemia, edema, malnutrition, and excessive postpartum bleeding. It boosts immunity and has anti-cancer properties. Regular intake leads to smoother skin, increased vitality, and longevity.

　　　　The mycelium of red mushrooms cannot be isolated, so artificial cultivation remains impossible to this day, making them increasingly precious. Their stems differ from other mushrooms—not brittle but tough and resilient. When picking, a bamboo skewer or tool must be inserted into the soil beneath to pry them loose. Red mushrooms usually grow in clusters, and since snakes and insects in the mountains may leave toxic secretions on them, to avoid poisoning, cooked fresh mushrooms should be boiled with rice grains; if the grains turn blue, the mushrooms are toxic and should be discarded.

　　　　In southern Fujian, women eat red mushrooms after childbirth to replenish nutrients. They are highly popular in Guangzhou, Hong Kong, and Southeast Asian countries. According to Compendium of Materia Medica: “Red mushrooms taste mild, have a warm nature, stimulate appetite, stop diarrhea, detoxify, nourish the body, and promote longevity when consumed regularly.” This shows that red mushrooms were consumed as early as the Ming Dynasty. They help nourish the spleen and liver, enrich blood, strengthen the stomach, and fortify kidneys. When local people lose their appetite, they use red mushrooms to restore it; for children’s diarrhea, red mushroom sprouts stewed into soup can stop the condition; new mothers eat red mushrooms to recuperate. Hence, they are also called “Southern Red Ginseng.” Adding red mushrooms to dishes like chicken, duck, eggs, pork belly, or pork chops not only enhances color but also sweetens the broth and improves flavor. As red mushrooms serve as both a natural flavor enhancer and pigment throughout history, they are prized as luxurious dishes for banquets, gifts, and hospitality, selling well both domestically and abroad. Red mushrooms grow in unique environments. A local saying goes: “Never planted, never flowering, the younger the better to eat, the older the more fibrous.” This vividly describes their characteristics. They have neither flowers nor seeds, growing naturally once a year in hot and humid climates. They grow only in fertile soil under dense camphor trees. Though seedless and flowerless, they have ancestral grounds where they propagate year after year. Foragers return annually to the same spots to harvest them.

　　　　Genuine red mushrooms have a deep red cap surface with a dark red center and transverse wrinkles. The underside of the cap has fine, evenly spaced, light grayish-blue gills, and the stem is short, round, and solid. Red mushrooms with fully opened caps and cracks are past their prime but still make good-tasting soup; unopened caps are cleaner to eat. Semi-open caps shaped like bicycle bells are top-grade red mushrooms—fragrant and delicious, and just a few enhance a dish perfectly. Unopened mushroom buds, though immature, are sweet and tender. Red mushrooms store well; dried and kept in a ventilated, dry room, they remain unspoiled for a long time and emit a pleasant fragrance. Wild red mushrooms are a premium edible fungus, purely wild, known for enriching blood—especially beneficial for new mothers and those with anemia. Delicious and highly nutritious, they help prevent colds and cirrhosis, lower blood pressure, reduce cholesterol, and have anti-cancer effects. Wild red mushrooms are a valuable edible fungus, purely wild, and excellent for enriching blood.