Dimocarpus longan
What's the taxonomical classification of Dimocarpus longan?
Dimocarpus longan belongs to the kingdom Plantae and is classified under the phylum Streptophyta. Within this lineage, it is situated in the class Equisetopsida and the subclass Magnoliidae. Moving through its hierarchical classification, the plant falls under the order Sapindales and the family Sapindaceae. Finally, it is identified by its specific genus, Dimocarpus, and its unique species designation, longan.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Sapindales |
| Family | Sapindaceae |
| Genus | Dimocarpus |
| Species | longan |
What are the morphological characteristics of this plant?
Dimocarpus longan has evergreen, woody branches characterized by oppositely arranged, leathery, elliptical leaves that measure approximately 5 to 15 centimeters in length. The foliage typically displays a dark green upper surface and a paler underside, providing a dense canopy structure. Small, fragrant, cream-colored flowers emerge in large, branched panicles from the axils of the leaves or terminal buds. These blossoms eventually develop into small, globose fruits with a thin, brownish, textured pericarp that protects a translucent, sweet aril. The internal structure of the fruit contains a single, hard, black seed that resembles a dragon eye.
What is the geographical distribution of this plant?
This plant is native to the subtropical and tropical regions of Southeast Asia, specifically spanning across southern China, Vietnam, Thailand, Malaysia, and Indonesia. It thrives in warm, humid climates characterized by high annual rainfall and well-drained soils. While its primary origins are in these Asian territories, it has been widely naturalized in other tropical locations due to human cultivation. Major commercial production is now also found in parts of India and various islands within the Pacific. The distribution is strictly limited by its sensitivity to frost and its requirement for consistent warmth.
How is this plant cultivated?
This plant, known as longan, thrives in subtropical climates with well-draining, slightly acidic soil and requires consistent moisture during its fruit-setting stage.
Growers should plant them in full sun to ensure optimal sugar development within the fruit. Pruning is essential to maintain tree structure and encourage airflow, which helps prevent fungal diseases. Regular fertilization with organic matter or balanced NPK blends supports healthy canopy growth and heavy yields.
Careful irrigation management is vital to avoid both waterlogging and drought stress throughout the growing season.
What parts of this plant are used medicinally?
This plant Dimocarpus longan utilizes its aril, leaf, root, seed, and flower for various medicinal purposes. The sweet aril is frequently consumed to nourish the heart and blood, while the leaves are brewed into teas to help calm the nerves. Medicinal preparations often involve the seeds, which are used to treat certain digestive issues or skin conditions. The roots are sometimes employed in traditional formulas to manage inflammation or promote circulation. Additionally, the flowers can be used to create fragrant infusions that assist in relaxing the body.
According to a study published by "Journal of ethnopharmacology", the longan arillus is the part of Dimocarpus longan Lour. used medicinally to treat conditions like insomnia, fatigue, and deficiency of qi and blood. To date, a total of 378 compounds have been identified in the longan arillus. These constituents include 12 sugars, 28 polyphenols, 234 volatile components, 12 terpenes and steroids, 28 organic acids, 15 lipids, 11 nucleosides, and 32 amino acids. Polysaccharides and polyphenols serve as the main active ingredients within this plant part. The longan arillus exhibits various biological activities, including antioxidant, anti-tumor, and anti-inflammatory effects.
The parts of this plant that are ued medicinally are shown in the list below.
- aril
- leaf
- root
- seed
- flower
What traditional systems uses this plant?
This plant, Dimocarpus longan, has been utilized for centuries within Traditional Chinese Medicine to nourish the heart and calm the spirit. Practitioners often prescribe the dried fruit to address symptoms of insomnia, palpitations, and anxiety by tonifying the blood and qi. Beyond its medicinal applications, it has historically been consumed as a sweet delicacy to support reproductive health and strengthen the spleen. In various Southeast Asian cultures, the fruit is also valued for its ability to alleviate fatigue and promote overall vitality. This long history of use highlights the plant's significant role in both dietary and therapeutic practices across Asia.
According to a study published by "Pharmaceutical biology", Dimocarpus longan is one of the Chinese medicinal plants used in a phytochemical preparation known as Slimax. This preparation was administered orally to human volunteers for a six week period using a double-blind experimental method. The study examined the effects of the mixture containing Dimocarpus longan on parameters such as body weight, waist and hip circumference, and Body Mass Index (BMI). Results indicated that the use of this herbal preparation shows great potential in the treatment of human obesity.
The hystorical systems that uses this plant are shown in the list below.
- Traditional Chinese Medicine
What are the pharmacological activities of Dimocarpus longan?
This plant has antioxidant, anti-inflammatory, anti-diabetic, anti-tumor, and immunomodulatory activities that contribute to its diverse therapeutic potential. Its high concentration of polyphenols and flavonoids allows it to effectively scavenge free radicals and mitigate oxidative stress within cells. These chemical properties also help regulate glucose metabolism and reduce systemic inflammation in various biological models. Furthermore, the plant demonstrates the ability to inhibit the proliferation of cancer cells while simultaneously enhancing the body's immune response. Such multifaceted pharmacological actions make Dimocarpus longan a significant subject for developing natural medicinal treatments.
According to a study published by "Journal of ethnopharmacology", Longan Arillus is one of 4 species frequently consumed in both daily diets and medicinal diet restaurants. This species shares an extensive history of use of more than 2000 years. It is characterized by a sweet flavour. Regarding its pharmacological properties, it exhibits antioxidant, antidiabetic, antilipemic and cardioprotective effects.
The primary pharmacological activities of this plant are shown in the list below.
- anti-inflammatory
- anti-tumor
- antioxidant
- immunomodulatory activity
- hypoglycemic
What medicinal compounds this plant contains?
This plant contains a variety of bioactive medicinal compounds including polyphenols, flavonoids, saponins, and the specific hydrolyzable tannin known as corilagin. These chemical constituents contribute to the plant's significant antioxidant and anti-inflammatory properties. Research suggests that these compounds may help protect cells from oxidative stress and support cardiovascular health. Additionally, certain extracts from the fruit and bark have demonstrated potential antimicrobial and neuroprotective effects in laboratory studies. These diverse phytochemicals make the species a subject of interest for developing new therapeutic agents.
According to a study published by "BioMed research international", Dimocarpus longan Lour. was identified as having the maximum content of corilagin among 10 species of plants reported to contain this compound. The study found that corilagin is an active antitumor composition. This specific component was identified through 1H-NMR, 13C-NMR, 2D-NMR, and mass spectrometric analyses. The research also noted that the coefficient of drug interaction (CDI) of 10 μM corilagin and 20 μM cDDP reached up to 0.77.
The primary medicinal compounds of this plant are shown in the list below.
- The list provided only contains one compound: corilagin. Therefore, it is impossible to extract 5 different compounds.
What health conditions is this plant used for?
This plant is used for treating deficiency of qi and blood, fatigue, insomnia, neurasthenia, and forgetfulness. By nourishing the heart and calming the spirit, it helps stabilize the nervous system to alleviate symptoms of exhaustion. Patients suffering from chronic mental fatigue or weakened energy levels often consume it to restore vital balance. Its properties are particularly beneficial for improving sleep quality and mental clarity in those experiencing cognitive decline. Regular use can also help soothe the emotional instability associated with neurasthenia.
According to a study published by "Journal of ethnopharmacology", Dimocarpus longan has been used since ancient times to treat diseases such as insomnia, forgetfulness, neurasthenia, overtihinking, fatigue, and deficiency of qi and blood. The plant contains 378 identified compounds, including 12 sugars, 28 polyphenols, 234 volatile components, 12 terpenes and steroids, 28 organic acids, 15 lipids, 11 nucleosides, and 32 amino acids. It demonstrates various biological activities such as anti-inflammatory, anti-tumor, and antioxidant effects. Additionally, research shows it has the ability for inhibition of Alzheimer's disease and inhibition of osteoporosis.
The main health conditions this plant is used for are shown in the list below.
- deficiency of qi and blood
- fatigue
- insomnia
- neurasthenia
- forgetfulness
What are the herbal preparations of this plant?
This plant is Dimocarpus longan, which is used in traditional medicine to create various preparations such as An Shen Ding Zhi Pill, Gui Splen Tang, Yu Ling Cream, and aqueous extract. These medicinal formulations often focus on nourishing the heart and calming the spirit to address insomnia or anxiety. Gui Splen Tang is a classic decoction that utilizes the fruit to tonify blood and strengthen the spleen. An Shen Ding Zhi Pill provides a concentrated approach to stabilizing mental activity through specific herbal combinations. Additionally, researchers utilize aqueous extract to isolate bioactive compounds for studying the plant's physiological effects. Yu Ling Cream represents another specialized application of the plant's properties in topical or concentrated forms.
According to a study published by "Journal of ethnopharmacology", Dimocarpus longan Lour. has been used since ancient times to make medicinal products like Gui Spleen Tang, Yu Ling Cream, and An Shen Ding Zhi Pill. These preparations have been used to treat diseases such as insomnia, forgetfulness, neurasthenia, overthinking, fatigue, and deficiency of qi and blood. To date, a total of 378 compounds have been identified in the Longan Arillus, which include 12 sugars, 28 polyphenols, 234 volatile components, 12 terpenes and steroids, 28 organic acids, 15 lipids, 11 nucleosides, 32 amino acids, and 6 other compounds. Polysaccharides and polyphenols serve as the main active ingredients in these preparations.
The main herbal preparations of this plant are shown in the list below.
- An Shen Ding Zhi Pill
- Gui Spleen Tang
- Yu Ling Cream
- aqueous extract
What side effects this plant can have?
This plant can cause nausea, digestive upset, allergic reaction, and dizziness in certain individuals. Consuming excessive amounts of the fruit may lead to gastrointestinal discomfort or an upset stomach. Some people might experience an allergic reaction, which can manifest through skin irritation or respiratory issues. Lightheadedness and dizziness are also reported side effects for those sensitive to its properties. It is important to monitor how your body responds after ingestion to avoid these complications.
The main side effects this plant can have are shown in the list below.
- Nausea
- Digestive upset
- Allergic reaction
- Dizziness
What herbs are paired with Dimocarpus longan?
This plant, commonly known as longan, is frequently paired with medicinal herbs such as jujubes, lotus seeds, and goji berries to enhance its tonic properties.
These combinations are traditionally used in Chinese medicine to nourish the blood and calm the spirit. When combined with dried ginger, the fruit can also help regulate body temperature and improve digestion. Some herbal decoctions also include ginseng or astragalus to strengthen the immune system and boost overall vitality.
Such synergistic blends are often consumed as soups or teas to promote restorative health.