Cassia fistula
What's the taxonomical classification of Cassia fistula?
Cassia fistula belongs to the kingdom Plantae and is classified under the phylum Streptophyta. Within the class Equisetopsida and the subclass Magnoliidae, it is categorized under the order Fabales. The plant is a member of the family Fabaceae and falls within the genus Cassia, ultimately reaching its specific designation as the species fistula.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Fabales |
| Family | Fabaceae |
| Genus | Cassia |
| Species | fistula |
What are the morphological characteristics of this plant?
Cassia fistula has a medium-sized deciduous tree structure characterized by pinnately compound leaves, drooping racemes of bright yellow flowers, and elongated, woody cylindrical pods. The leaves typically consist of 4 to 8 pairs of leaflets that are oblong or elliptic in shape with rounded tips. Its inflorescence is composed of pendulous clusters that can reach lengths of up to 30 centimeters, each bearing numerous small, five-petaled blossoms. The fruit develops into long, dark brown, legume-like pods that can grow up to 60 centimeters in length and contain many hard, dark seeds. The bark is generally smooth and greyish, providing a sturdy base for the spreading canopy of the tree.
What is the geographical distribution of this plant?
This plant is native to the tropical regions of South and Southeast Asia, specifically spanning across India, Sri Lanka, Myanmar, Thailand, and parts of Indonesia. It thrives in warm, humid climates where it can be found in deciduous forests and along riverbanks. Due to its ornamental beauty, it has been widely introduced to other tropical areas including parts of Africa and the Caribbean. The species prefers well-drained soils and is often cultivated in urban parks throughout many subtropical zones. These widespread distributions are primarily driven by both its natural habitat requirements and human interest in its golden blooms.
How is this plant cultivated?
This plant requires well-drained soil and full sunlight to thrive in tropical or subtropical climates with temperatures consistently above 20 degrees Celsius.
Propagation is most effectively achieved through seeds that should be sown directly into the ground or nursery beds during the onset of the rainy season. While the species is relatively hardy and drought-tolerant once established, regular watering is essential during the initial seedling stage to ensure vigorous growth. Growers should provide ample space for the tree to expand, as it eventually develops a large, spreading canopy.
Periodic pruning can help maintain the structural integrity of the branches and encourage the production of its iconic golden flower clusters.
What parts of this plant are used medicinally?
This plant utilizes its bark, fruit, flowers, leaves, and roots for various medicinal purposes including treating constipation, skin diseases, and inflammation. The fruit pods contain a mucilaginous pulp that acts as a powerful natural laxative. Bark extracts are frequently applied to heal wounds or used to manage fever and digestive issues. The flowers are often utilized in traditional remedies to soothe the skin or treat respiratory ailments. Additionally, the leaves and roots provide essential compounds used to reduce swelling and combat parasitic infections.
According to a study published by "Current research in pharmacology and drug discovery", phytochemicals from the Cassia fistula bark are abundant, less toxic, and target specific. The study identified a saponin-polybromophenol antibiotic named CU1 from this bark. This compound was purified on an HPLC C18 column at 3min. In an agar-hole assay, CU1 is bacteriocidal but three times less active than rifampicin. While it showed greater than fifteen times poor inhibitor in LB medium due to solubility problems, it successfully inhibited transcription from Escherichia coli and Mycobacterium tuberculosis RNA polymerases.
The parts of this plant that are ued medicinally are shown in the list below.
- Bark
- Fruit
- Flower
- Leaf
- Root
What traditional systems uses this plant?
This plant, known scientifically as Cassia fistula, has been utilized for centuries in Ayurvedic medicine and broader Indian traditional medicine to treat various ailments. In the Ayurvedic system, the fruit pulp is frequently employed as a gentle laxative to manage constipation and cleanse the digestive tract. Practitioners also utilize the bark and leaves to address skin conditions, inflammation, and fever. The seeds and flowers are sometimes integrated into topical applications to soothe irritations. These historical practices rely on the plant's potent emollient and purgative properties to restore bodily balance.
According to a study published by "Journal of Ayurveda and integrative medicine", the AYUSH sector relies mainly on medicinal plants and metals which form the foundation of traditional healing practices. One of the five medicinal plants included in the Virtual Herbal Garden is Cassia fistula. This digital platform provides 3D models and multimedia resources to offer detailed information on the plant. The project was initiated as a solution for a problem statement given by the All India Institute of Ayurveda under the Smart India Hackathon 2024. This educational tool aims to promote awareness and understanding of plants used in traditional medicine.
The hystorical systems that uses this plant are shown in the list below.
- Ayurveda
- Indian traditional medicine
What are the pharmacological activities of Cassia fistula?
This plant has diverse pharmacological activities including analgesic, anti-diabetic, anti-inflammatory, anti-oxidant, and laxative properties. The presence of bioactive compounds like polyphenols and flavonoids allows the plant to neutralize free radicals and reduce oxidative stress in the body. Its anti-inflammatory and analgesic effects help in managing pain and swelling by inhibiting specific biochemical pathways. Furthermore, the plant functions as an effective laxative to promote bowel regularity and can assist in regulating blood glucose levels due to its anti-diabetic capabilities. These combined medicinal properties make Cassia fistula a significant subject in traditional and modern pharmacology.
According to a study published by "Heliyon", the methanolic crude extract of Cassia fistula leaves demonstrated glucose-lowering capacity, analgesic, and anti-diahrreal activities. Significant reductions in blood glucose levels (p < 0.05) were observed at 60 min, 120 min, and 180 min after loading doses of 200 mg/kg, 400 mg/kg, and 600 mg/kg. The extract showed significant (p < 0.05) effects against central and peripheral pain compared to 2 mg/kg bw of morphine and 50 mg/kg bw of diclofenac sodium. At a dose of 400 mg/kg bw, the methanol extract inhibited 72.0 % of diarrheal episodes in mice, whereas the standard drug loperamide showed 80.0% inhibition. Computational investigations also indicated impressive anticancer and antimicrobial potentiality through binding affinity with EGFR and DHFR receptors.
The primary pharmacological activities of this plant are shown in the list below.
- analgesic
- anti-diabetic
- anti-inflammatory
- anti-oxidant
- laxative
What medicinal compounds this plant contains?
This plant contains the medicinal compounds fiustulain A, fiustulain B, fistulaquinones A-C, anthraqquinone glycosides, and rhein. These specific phytochemicals are responsible for the various therapeutic properties attributed to the species. The anthraqquinone glycosides and rhein contribute significantly to its pharmacological activities. Additionally, the unique presence of fiustulain A, fiustulain B, and the fistulaquinones A-C group distinguishes its chemical profile. These diverse constituents work together to support the plant's medicinal uses in traditional treatments.
According to a study published by "Journal of Asian natural products research", three new anthraquinones named fistulaquinones A-C (1-3) and three known ones (4-6) were isolated from the twigs of Cassia fistula. Among these, compound 3 showed significant anti-tobacco mosaic virus activity with an inhibition rate of 34.5% at a 20 μM concentration. Furthermore, compounds 1-6 exhibited moderate cytotoxicity against certain tested human tumor cell lines. The IC50 values for these compounds ranged from 2.8 to 9.4 μM.
The primary medicinal compounds of this plant are shown in the list below.
- Fiustulain A
- Fiustulain B
- fistulaquinones A-C
- chrysophanol
- rhein
What health conditions is this plant used for?
This plant is used for treating constipation, diarrhea, dysentery, diabetes, and various forms of inflammation. The fruit pulp acts as a natural laxative to relieve constipation, while the bark and leaves help manage intestinal issues like diarrhea and dysentery. Its chemical properties are also utilized to regulate blood sugar levels in patients suffering from diabetes. Additionally, the plant possesses anti-inflammatory qualities that help reduce swelling and pain in different parts of the body.
According to a study published by "Frontiers in plant science", Cassia fistula is mentioned as one of the 4 morphologically related species that can be mixed with Indian senna. The study notes that the bulk of dried leaves and pods from Cassia fistula is usually mixed with Indian senna in laxative-based formulations. This occurs because the admixture is used in these specific medicinal preparations. The investigation involved 44 accessions of Indian senna and 4 adulterant species to develop markers. These markers were validated across 48 samples to ensure the true identity of the medicinal plants.
The main health conditions this plant is used for are shown in the list below.
- constipation
- diarrhea
- diarrhoea
- dysentery
- stomach problems
What are the herbal preparations of this plant?
This plant is used to create various medicinal herbal preparations including an 80% methanolic extract, alcoholic extracts of stem bark, an aqueous fraction, decoction, and oils. Researchers utilize these diverse forms to isolate specific bioactive compounds responsible for the plant's therapeutic effects. For instance, the alcoholic extracts of the stem bark and the 80% methanolic extract are often studied for their concentrated phytochemical profiles. Additionally, the aqueous fraction and traditional decoction provide water-soluble components useful for different medicinal applications. Finally, oils derived from the plant serve as specialized topical or systemic preparations in herbal medicine.
According to a study published by "Acta poloniae pharmaceutica", alcoholic extracts of the stem bark of Cassia fistula Linn. were evaluated for anti-hyperglycemic effects, antioxidant potential, and renal complications in alloxan-induced diabetic rats. This extract caused a significant decrease in blood glucose levels and helped recover serum cholesterol, serum triglyceride, serum creatinine, serum albumin, total proteins, and body weight to normal levels. The alcoholic extract also showed significant antioxidant activity in in vitro assay methods induced by DPPH, nitric oxide, and hydroxyl radicals. Furthermore, acute toxicity studies established that there were no signs of toxicity up to a dose level of 2000 mg/p.o. Ultimately, the stem bark of Cassia fistula Linn. possesses a blood glucose lowering effect, antioxidant effect, and protective effect on renal complications associated with hyperglycemia.
The main herbal preparations of this plant are shown in the list below.
- 80% methanolic extract
- alcoholic extracts of stem bark
- aqueous fraction
- decoction
- oils
What side effects this plant can have?
This plant can cause gastrointestinal issues such as diarrhoea, dysentery, and stomach infection when consumed in inappropriate amounts. Because it possesses strong laxative properties, excessive use often leads to urgent bowel movements and dehydration. Some studies also indicate that the plant may decrease glucose tolerance in certain individuals. These adverse reactions highlight the necessity of careful dosage and professional guidance when using its derivatives.
According to a study published by "Journal of ethnopharmacology", Cassia fistula L. is one of the most preferred species used by the Bhoxa community for the treatment of dysentery and diarrhoea. This plant is part of a group of 50 medicinal plants, comprising 45 genera and 30 families, identified in the ethnomedicinal survey. Out of these 50 plants, 27 species were used for dysentery, 41 for diarrhoea, and 18 were used for both conditions. While 27 of the recorded plants have proven antidiarrhoeal properties, the remaining 23 plants have yet to be pharmacologically evaluated. Furthermore, except for 6 plants, all other recorded plants have shown antimicrobial properties in previous microbiological studies.
The main side effects this plant can have are shown in the list below.
- diarrhoea
- dysentery
- laxative
- decrease in glucose tolerance
- stomach infection
What herbs are paired with Cassia fistula?
This plant pairs effectively with ginger, honey, and licorice to enhance its laxative and purgative properties.
When used in traditional formulations, ginger is often added to mitigate the potential stomach cramping caused by the fruit pulp. Honey serves as a natural sweetener to mask the bitter profile of the bark and flowers during decoction. Licorice root is frequently included to soothe the digestive tract and balance the plant's potent cooling effects.
These combinations are specifically designed to optimize the therapeutic impact on the gastrointestinal system.