Osmanthus fragrans
What's the taxonomical classification of Osmanthus fragrans?
Osmanthus fragrans belongs to the kingdom Plantae and is classified within the phylum Streptophyta. Moving down the taxonomic hierarchy, it is categorized under the class Equisetopsida and the subclass Magnoliidae. Within the order Lamiales, this plant is placed in the family Oleaceae. Finally, its specific classification is defined by the genus Osmanthus and the species fragrans.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Lamiales |
| Family | Oleaceae |
| Genus | Osmanthus |
| Species | fragrans |
What are the morphological characteristics of this plant?
Osmanthus fragrans has an evergreen shrub or small tree structure characterized by opposite, leathery, elliptical leaves that measure approximately 5 to 15 centimeters in length and feature entire margins and a glossy dark green upper surface. The foliage remains dense throughout the year, providing a thick canopy of foliage. Small, tubular, four-lobed flowers emerge in clusters from the leaf axils, typically appearing in late autumn or early spring. These tiny blossoms are creamy white or pale yellow and are renowned for their intense, sweet fragrance. The plant also produces small, ovoid drupes that transition from green to a dark purple or black color upon ripening.
What is the geographical distribution of this plant?
This plant is native to China, where it grows naturally across various provinces and regions. It has since been introduced and widely naturalized in other parts of East Asia, including Japan and Korea. Beyond its native range, the species is cultivated in many temperate and subtropical regions across the globe due to its ornamental value. Many gardeners in Europe and North America grow it in mild climates where it can thrive. Its ability to adapt to different environments has led to a broad international distribution in urban landscapes and botanical collections.
How is this plant cultivated?
This plant requires well-draining, slightly acidic soil and a location that receives full sun to partial shade to thrive.
For optimal growth, it should be planted in a spot where its roots can stay moist but never waterlogged. Regular watering is necessary during the establishment phase, though established shrubs become quite drought-tolerant once settled. Providing organic mulch around the base helps retain moisture and regulates soil temperature throughout the seasons.
Periodic pruning after the flowering period can maintain its shape and encourage more fragrant blooms next year.
What parts of this plant are used medicinally?
This plant Osmanthus fragrans provides medicinal utility through its fragrant flowers, fleshy fruits, green leaves, woody roots, and small seeds. The flowers are frequently harvested to create aromatic teas and infusions that help soothe the nervous system and improve circulation. Its fruits are often utilized in traditional remedies to support digestive health and provide essential vitamins. The leaves can be processed into decoctions to treat inflammation or skin conditions. Additionally, both the roots and the seeds are sometimes employed in specialized herbal preparations to address various internal imbalances.
According to a study published by "Plants (Basel, Switzerland)", Osmanthus fragrans (Thunb.) Lour. flowers (OF-F) are used in folk medicine and as a functional food. The ethanol extract of these flowers (OF-F-E) contained 233.360 ± 3.613 g/kg of total polyphenols and 93.350 ± 1.003 g/kg of tannin. This specific extract demonstrated a DPPH scavenging activity with an IC50 of 0.173 ± 0.004 kg/L and a FRAP value of 830.620 ± 6.843 g Trolox/kg. Network analysis showed that metabolites from the plant could affect 13 molecular functions and 13 biological processes in 4 cellular components. These findings suggest the metabolites of Osmanthus fragrans could serve as a medicinal herb for anticancer drug development.
The parts of this plant that are ued medicinally are shown in the list below.
- flower
- fruits
- leaves
- roots
- seeds
What traditional systems uses this plant?
This plant, Osmanthus fragrans, has been utilized for centuries within Traditional Chinese Medicine to treat various ailments by addressing imbalances in the body's qi and blood. Practitioners historically prescribed the fragrant flowers to alleviate menstrual irregularities, soothe digestive issues, and reduce inflammation. Beyond its medicinal applications, the plant holds significant cultural value in East Asian traditions, where its blossoms are often used to scent tea and culinary delicacies. The essential oils extracted from the flowers have also been employed in ancient perfumery to create calming aromatic blends. These historical uses demonstrate the plant's dual role as both a therapeutic agent and a sensory staple in traditional societies.
According to a study published by "Frontiers in pharmacology", Osmanthus fragrans (Thunb.) Lour. has a long history of cultivation in China for ornamental purposes and as an edible plant known for conferring fragrance to desserts. The roots, stems, leaves, flowers and fruits of Osmanthus fragrans possess medicinal value that is recorded in the classics of traditional Chinese medicine. Through a systematic and nonexhaustive search of articles, papers and books, fifteen metabolites were identified. These fifteen metabolites were classified into 3 categories according to their properties and structure: flavonoids, terpenes and phenolic acids. These secondary metabolites can be used to treat many human diseases, such as cancer, skin diseases, cardiovascular diseases, and neurological diseases.
The hystorical systems that uses this plant are shown in the list below.
- Traditional Chinese Medicine
What are the pharmacological activities of Osmanthus fragrans?
This plant has anti-inflammatory, anti-cancer, anti-oxidant, anti-hyperglycemic, and antibacterial pharmacological activities driven by its diverse bioactive compounds. Research indicates that its phytochemicals effectively neutralize free radicals, providing a robust anti-oxidant defense for cells. The extract also demonstrates the ability to inhibit bacterial growth and reduce systemic inflammation in various biological models. Furthermore, studies suggest that Osmanthus fragrans can suppress tumor progression and assist in regulating blood glucose levels. These multi-faceted properties make the plant a significant subject for developing new therapeutic agents.
According to a study published by "Fitoterapia", Osmanthus fragrans seeds contain the bioactive iridoid terpenoid compound specnuezhenide (SPN). This compound plays an anti-inflammatory role by regulating the NF-κB and MAPK signaling pathways. Through these pathways, SPN works by down-regulating the expression of TNF-α, IL-1β, IL-6, and other cytokines. While SPN is primarily distributed in the stomach, intestine, and liver, its bioavailability is significantly reduced due to limited absorption in the gastrointestinal tract and low blood concentration. This compound holds potential in the prevention and treatment of liver, lung, and kidney complications.
The primary pharmacological activities of this plant are shown in the list below.
- anti-inflammatory
- antioxidant
- anti-cancer
- antibacterial
- anti-hyperglycemic
What medicinal compounds this plant contains?
This plant contains a diverse array of bioactive medicinal compounds including oleanolic acid, kaempferol-3-o-b-d-glucopyranoside, rutin, quercetiin-3-o-b-d-glucopyranoside, and lupeol. These specific phytochemicals are primarily recognized for their significant antioxidant and anti-inflammatory properties. The presence of various flavonoids like rutin and kaempferol-3-o-b-d-glucopyranoside suggests a strong capacity to combat oxidative stress in biological systems. Furthermore, the triterpenoids oleanolic acid and lupeol contribute to the plant's therapeutic potential regarding cellular protection. Together, these chemical constituents provide a scientific basis for the traditional medicinal uses of Osmanthus fragrans.
According to a study published by "Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica", 32 compounds were isolated and identified from the ethyl acetate portion of the alcohol extract of Osmanthus fragrans. These identified structures include boschniakinic acid (1), ursolaldehyde (2), augustic acid (3), arjunolic acid (4), 5-hydroxymethyl-2-furancarboxaldehyde (5), isoscutellarein (6), 6, 7-dihydroxycoumarin (7), 2α-hydroxy-oleanolic acid (8), quercetin-3-0-β-D-glu-copyranoside (9), D-allito (10), 5, 4'-dihydroxy-7- methoxyflavone-3-0-β-D-glucopyranoside (11), 5,7-dihydroxychromone (12), lupeol (13), naringenin (14), acetyloleanolic acid (15), chlorogenic acid (16), kaempferol-3-0-β-D-glucopyranoside (17), oleanolic acid (18), kaempferol-3-0-β-D-galactopyanoside (19), 3', 7-dihydroxy-4'-methoxyisoflavon (20), ergosta-4,6,8 (21), 22-tetraen-3-one (21), p-hydroxycinnamic acid (22), syringaresinol (23), 3,4-dihydroxyacetophenonel (24), β-sitosterol (25), ethyl p-hydroxyphenylacetate (26), benzoic acid (27), caffeic acid (28), coelonin (29), p-hydorxy-phenylacetic acid (30), p-hydroxyacetophenone (31), and methyl-p-hydroxphenylacetate (32). Apart from compounds 2, 4, 5, 8-11, 13, 15, 18, 20, 25, and 27, the remaining substances were isolated from Osmanthus fragrans for the first time.
The primary medicinal compounds of this plant are shown in the list below.
- oleanolic acid
- kaempferol-3-0-β-D-glucopyranoside
- rutin
- quercetin-3-0-β-D-glucopyranoside
- lupeol
What health conditions is this plant used for?
This plant is used for treating asthma, cough, inflammation, rheumatism, and various skin diseases. Its aromatic properties are often harnessed in traditional remedies to soothe respiratory distress and ease persistent coughing. The plant's anti-inflammatory effects help reduce swelling and discomfort associated with painful rheumatism. Additionally, topical applications or derivatives are utilized to manage various skin diseases by calming irritation. These diverse medicinal uses highlight the plant's significant role in holistic wellness practices.
According to a study published by "Journal of ethnopharmacology", Osmanthus fragrans is traditionally used for the treatment of weakened vision, halitosis, panting, asthma, cough, toothache, stomachache, diarrhea, rheumatism, physique pain and hepatitis. More than 183 compounds have been isolated and structurally identified from different plant parts of this species. Pharmacological studies have demonstrated that the plant and its active components possess a wide range of biological activities, including antioxidant, antitumor, anti-inflammatory, anti-hyperglycemic, anti-thrombotic, anti-melanogenesis, neuroprotective, and hepatoprotective activities. These bioactivities are associated with major bioactive substances such as ionone, ionol, flavonoids, polyphenols and iridoids. The chemical structures of all identified compounds were drawn using ChemBioDraw Ultra 14.0 software.
The main health conditions this plant is used for are shown in the list below.
- asthma
- cough
- inflammation
- rheumatism
- skin diseases
What are the herbal preparations of this plant?
This plant is used to create various medicinal preparations including alcohol extract, essential oil, and concentrated extracts through methods like ethanol heat reflux extraction. The essential oil is frequently harvested to provide potent aromatic compounds for therapeutic applications. Researchers often employ ethanol heat reflux extraction to maximize the yield of bioactive constituents from the blossoms. These resulting extracts serve as the foundational components for many traditional herbal remedies. Such specialized preparations allow for the controlled administration of the plant's natural medicinal properties.
According to a study published by "Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica", 32 compounds were isolated and identified from the ethyl acetate portion of the alcohol extract of Osmanthus fragrans. These compounds include boschniakinic acid (1), ursolaldehyde (2), augustic acid (3), arjunolic acid (4), 5-hydroxymethyl-2-furancarboxaldehyde (5), isoscutellarein (6), 6, 7-dihydroxycoumarin (7), 2α-hydroxy-oleanolic acid (8), quercetin-3-0-β-D-glu-copyranoside (9), D-allito (10), 5, 4'-dihydroxy-7- methoxyflavone-3-0-β-D-glucopyranoside (11), 5,7-dihydroxychromone (12), lupeol (13), naringenin (14), acetyloleanolic acid (15), chlorogenic acid (16), kaempferol-3-0-β-D-glucopyranoside (17), oleanolic acid (18), kaempferol-3-0-β-D-galactopyanoside (19), 3', 7-dihydroxy-4'-methoxyisoflavon (20), ergosta-4,6,8 (21), 22-tetraen-3-one (21), p-hydroxycinnamic acid (22), syringaresinol (23), 3,4-dihydroxyacetophenonel (24), β-sitosterol (25), ethyl p-hydroxyphenylacetate (26), benzoic acid (27), caffeic acid (28), coelonin (29), p-hydorxy-phenylacetic acid (30), p-hydroxyacetophenone (31), and methyl-p-hydroxphenylacetate (32). Except for compounds 2, 4, 5, 8-11, 13, 15, 18, 20, 25, and 27, the remaining substances were isolated from Osmanthus fragrans for the first time.
The main herbal preparations of this plant are shown in the list below.
- alcohol extract
- essential oil
- ethanol heat reflux extraction
- extracts
What side effects this plant can have?
This plant can cause allergic reactions, nausea, dizziness, and gastrointestinal upset in some individuals. Some people may experience skin irritation or respiratory issues when coming into direct contact with the flowers or their scent. Ingesting preparations made from the plant can sometimes lead to an upset stomach or general digestive discomfort. Certain users have also reported feeling lightheaded or experiencing bouts of dizziness after exposure. These adverse reactions typically vary depending on the person's sensitivity to the plant's aromatic compounds.
The main side effects this plant can have are shown in the list below.
- Allergic reactions
- Nausea
- Dizziness
- Gastrointestinal upset
What herbs are paired with Osmanthus fragrans?
This plant pairs most effectively with aromatic herbs such as jasmine, rose, mint, and chamomile to enhance its natural apricot-like fragrance.
When used in culinary applications, the delicate scent of Osmanthus fragrans complements the brightness of lemon verbena and the earthy undertones of sage. In tea blending, pairing these tiny blossoms with lavender or lemongrass creates a complex and soothing sensory experience. These combinations work well because the floral sweetness of the osmanthus balances the sharp or medicinal notes of the secondary herbs.
Using such pairings allows the subtle aroma of the plant to stand out without being overwhelmed by stronger botanicals.