Crotalaria retusa
What's the taxonomical classification of Crotalaria retusa?
Crotalaria retusa belongs to the kingdom Plantae and is classified within the phylum Streptophyta. As a member of the class Equisetopsida and the subclass Magnoliidae, it follows the evolutionary lineage leading to the order Fabales. It is further categorized under the family Fabaceae, which is commonly known as the legume or pea family. Within this family, the plant is placed in the genus Crotalaria, and its specific designation is given by the species name retusa.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Fabales |
| Family | Fabaceae |
| Genus | Crotalaria |
| Species | retusa |
What are the morphological characteristics of this plant?
Crotalaria retusa has an erect, herbaceous growth habit characterized by stems that are typically branched and covered in fine, spreading hairs. The leaves are alternate and pinnately compound, featuring several pairs of leaflets that often exhibit a distinctively notched or emarginate apex. Its flowers are bright yellow and zygomorphic, possessing a large upper petal known as a standard that is often slightly inflated. The fruit develops into a distinctive, inflated, or bladder-like legume that contains several small, hard seeds. This morphology is highly adapted to its natural habitat, allowing the plant to thrive in disturbed or sandy soils.
What is the geographical distribution of this plant?
This plant is native to the tropical and subtropical regions of Africa, specifically spanning from West Africa through East Africa to South Africa. It is most commonly found in savannas, grasslands, and open woodlands where sunlight is abundant. Some populations may also be found in disturbed habitats or along the edges of coastal vegetation. Its distribution is largely dictated by the availability of seasonal rainfall and warm temperatures typical of these climates. Localized occurrences depend on specific soil compositions found across the African continent.
How is this plant cultivated?
This plant, Crotalaria retusa, is cultivated as a green manure or forage crop in tropical and subtropical climates by sowing its seeds directly into well-drained, loamy soils.
It thrives in full sunlight and requires moderate moisture levels to ensure optimal growth and nitrogen fixation. Farmers often integrate this legume into crop rotations to naturally enhance soil fertility through its symbiotic relationship with rhizobia bacteria. During the growing season, regular weeding is necessary to prevent competition for nutrients.
Once the plant reaches its flowering stage, it is typically incorporated into the earth or harvested for livestock feed.
What parts of this plant are used medicinally?
This plant uses its seeds, roots, leaves, stems, and fruits for various medicinal purposes in traditional healing practices. The seeds are often processed to treat specific ailments, while the roots are utilized for their therapeutic properties. Leaves are frequently prepared as topical applications or infusions to address different health concerns. The stems also contribute to the plant's medicinal profile through various decoctions. Finally, the fruits are integrated into local remedies to support overall wellness.
According to a study published by "Mutation research", six extracts were evaluated from Crotalaria retusa L., including tea and aqueous extract of leaves, tea, aqueous and methanolic extracts of dried fruit, and tea of unripe fruit. The extracts obtained from fruits of Crotalaria retusa were found to cause a dose-dependent increase in the frequency of chromosomal aberrations in mice. No statistically significant increase in the frequency of aberrant cells was observed for the animals treated with leaf extracts obtained from Crotalaria retusa. The study discussed the possibility that the pyrrolizidine alkaloid, monocrotaline, present in Crotalaria retusa exerts a clastogenic effect on mouse bone marrow cells. Animals were killed 24 h after intraperitoneal treatment to prepare bone marrow cells.
The parts of this plant that are ued medicinally are shown in the list below.
- fruit
- leaf
- roots
- seeds
- stems
What traditional systems uses this plant?
This plant, Crotalaria retusa, is utilized within Traditional African Medicine to treat various ailments including skin infections, stomach pains, and inflammatory conditions. Practitioners often prepare decoctions or topical applications using the leaves and roots to address these specific health concerns. Historically, different ethnic groups have integrated the species into their local healing practices to manage wounds and promote healing. The chemical constituents found in the plant serve as the basis for its long-standing reputation in indigenous pharmacological systems. These historical uses reflect a deep ethnobotanical understanding of the plant's medicinal properties across different regions.
According to a study published by "Annals of tropical medicine and parasitology", Crotalaria retusa is one of 10 plant species currently used in the traditional medicine of Cameroon. The antimicrobial activities of a methanol extract of this plant were investigated in vitro using disc-diffusion assays. These assays tested the extract against 37 reference or laboratory strains of 7 species of microorganism. Although the methanol extracts of the 10 species displayed some degree of antimicrobial activity against at least one species, no activity was observed against the Gram-negative bacteria. For microorganisms that produced an inhibition zone measuring at least 9 mm in diameter, the minimal inhibitory concentrations were estimated by agar dilution.
The hystorical systems that uses this plant are shown in the list below.
- Traditional African Medicine
What are the pharmacological activities of Crotalaria retusa?
This plant has antibacterial, antimicrobial, antioxidant, and clastogenic activities. Its bioactive compounds demonstrate a significant ability to inhibit the growth of various pathogenic microorganisms. Research indicates that the plant also possesses potent antioxidant properties that help neutralize harmful free radicals in biological systems. However, studies have also identified a clastogenic effect, which means the plant can cause structural damage to chromosomes. These diverse pharmacological profiles highlight both the medicinal potential and the genetic risks associated with its chemical constituents.
According to a study published by "Asian Pacific journal of tropical medicine", the ethanolic extract of in vitro raised Crotalaria retusa was effective on tested microorganisms. An optimal zone of inhibition (ZOI) value of 38 mm was obtained against Pseudomonas aeruginosa (P. aeruginosa). For the antioxidant activity, the optimal concentration (IC50) required for 50% inhibition of the DPPH radical scavenging was 57.6 μ g/mL for the ethanolic extract of in vitro propagated C. retusa. This in vitro propagated C. retusa possesses significant pharmacological activities. The IC50 values for the ethanolic extracts were evaluated through linear regression analysis (R(2) ≤ 1).
The primary pharmacological activities of this plant are shown in the list below.
- antibacterial
- antimicrobial
- antioxidant
- clastogenic effect
What medicinal compounds this plant contains?
This plant contains various phytochemicals including alkaloids, flavonoids, tannins, and saponins that contribute to its therapeutic potential. The specific presence of pyrrolizidine alkaloids is a significant chemical feature of the genus, though their toxicity must be carefully managed. Flavonoid compounds within the species often provide antioxidant and anti-inflammatory properties in traditional medicinal applications. Additionally, the tannins present in the plant can exhibit astringent qualities used in various herbal remedies. These diverse secondary metabolites work together to define the plant's pharmacological profile.
What health conditions is this plant used for?
This plant is used for treating various bacterial and fungal ailments due to its potent antimicrobial properties. Researchers have specifically identified its effectiveness in combating Pseudomonas aeruginosa infections through its bioactive compounds. These phytochemical constituents work by inhibiting the growth and spread of harmful microorganisms within the body. Beyond simple infection control, the plant serves as a natural resource for managing diverse pathological conditions. This medicinal utility makes it a significant subject in pharmacological studies focused on natural antibiotic alternatives.
According to a study published by "Asian Pacific journal of tropical medicine", the ethanolic extract of in vitro raised Crotalaria retusa was effective against tested microorganisms. An optimal zone of inhibition value of 38 mm was obtained against Pseudomonas aeruginosa. For the inhibition of the DPPH radical, an optimal concentration or IC50 of 57.6 μg/mL was obtained for the ethanolic extract of in vitro propagated C. retusa. These findings indicate that the plant possesses significant pharmacological activities. The IC50 values for the ethanolic extracts of Crotalaria species were evaluated through linear regression analysis where R(2) ≤ 1.
The main health conditions this plant is used for are shown in the list below.
- The provided list does not contain enough information to extract 5 relevant health conditions.
What are the herbal preparations of this plant?
This plant is used to create medicinal herbal preparations including an aqueous extract of dried fruit and various leaf extracts. These specific formulations are traditionally utilized for their diverse therapeutic properties in folk medicine. The aqueous extract is often prepared by soaking the dried fruits in water to release bioactive compounds. Similarly, extracts derived from the leaves serve as important components in topical or oral treatments. These preparations highlight the multifaceted pharmacological potential of the species.
According to a study published by "Mutation research", six extracts were evaluated from Crotalaria retusa L., which included tea and aqueous extract of leaves, tea, aqueous and methanolic extracts of dried fruit, and tea of unripe fruit. These extracts were injected intraperitoneally into mice, and the animals were killed 24 h after treatment to prepare bone marrow cells. The extracts obtained from fruits of Crotalaria retusa were found to cause a dose-dependent increase in the frequency of chromosomal aberrations in mice. In contrast, no statistically significant increase in the frequency of aberrant cells was observed for the animals treated with leaf extracts obtained from Crotalaria retusa. The study discusses the possibility that the pyrrolizidine alkaloid, monocrotaline, present in Crotalaria retusa exerts a clastogenic effect on mouse bone marrow cells. The effects of oral exposure to extracts of Crotalaria retusa remain unknown.
The main herbal preparations of this plant are shown in the list below.
- aqueous extract of dried fruit
- leaves extracts
What side effects this plant can have?
This plant can cause chromosomal aberrations and significant genetic damage due to the presence of toxic pyrrolizidine alkaloids in its tissues. These chemical compounds are metabolized in the liver into reactive pyrroles that target cellular DNA. Such mutations can lead to severe systemic health issues, including the development of liver tumors. Chronic exposure often results in hepatic veno-occlusive disease, which obstructs blood flow within the liver. Consequently, even small amounts of the plant can pose a serious threat to long-term biological stability.
According to a study published by "Mutation research", the evaluation of six extracts from Crotalaria retusa L. involved tea and aqueous extracts of leaves, as well as tea, aqueous, and methanolic extracts of dried fruit and tea of unripe fruit. Extracts obtained from the fruits of Crotalaria retusa were found to cause a dose-dependent increase in the frequency of chromosomal aberrations in mice. In contrast, no statistically significant increase in the frequency of aberrant cells was observed for animals treated with leaf extracts from Crotalaria retusa. The study discusses the possibility that the pyrrolizidine alkaloid, monocrotaline, present in Crotalaria retusa exerts a clastogenic effect on mouse bone marrow cells. These findings are based on intraperitoneal treatments, as the effects of oral exposure to extracts of Crotalaria retusa are unknown.
The main side effects this plant can have are shown in the list below.
- chromosomal aberrations
What herbs are paired with Crotalaria retusa?
This plant pairs most effectively with medicinal herbs like ginger, turmeric, and peppermint to enhance its therapeutic profile.
These combinations are often used in traditional herbalism to balance the plant's specific chemical properties. Ginger and turmeric provide warming effects that complement the plant's natural constituents during tea preparation. Peppermint is frequently added to improve the flavor profile and soothe the digestive system.
Such mixtures allow practitioners to tailor the herbal remedy to specific wellness needs.