Lotus corniculatus
What's the taxonomical classification of Lotus corniculatus?
Lotus corniculatus belongs to the kingdom Plantae and is classified under the phylum Streptophyta. Within the class Equisetopsida and the subclass Magnoliidae, it is organized into the order Fabales. The plant is a member of the family Fabaceae, falling under the genus Lotus, and is specifically identified by its species name, corniculatus.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Fabales |
| Family | Fabaceae |
| Genus | Lotus |
| Species | corniculatus |
What are the morphological characteristics of this plant?
Lotus corniculatus has pinnate leaves composed of several pairs of small, oval leaflets and bright yellow, pea-like flowers arranged in dense umbels. The plant typically grows as a low-lying perennial with creeping stems that can root at the nodes to form dense mats. Each flower possesses the characteristic structure of the Fabaceae family, including a standard, wings, and a keel. The leaves are often covered in fine hairs that provide a soft texture to the foliage. Small, elongated seed pods follow the flowering stage, marking the completion of its reproductive cycle.
What is the geographical distribution of this plant?
This plant is native to the Mediterranean region, spanning across southern Europe, northern Africa, and western Asia. It thrives in diverse habitats ranging from coastal dunes and rocky cliffs to dry grasslands and open woodlands. Within its natural range, the species is frequently found in sunny, well-drained soils where competition from larger vegetation is minimal. Some populations have also become naturalized in other temperate parts of the world due to human activity. Its distribution is largely dictated by its preference for warm, Mediterranean-style climates.
How is this plant cultivated?
This plant requires well-drained, sandy or gravelly soils and full sun exposure to thrive in most temperate climates.
It is highly drought-tolerant once established, making it an excellent choice for dry meadows or rocky slopes. Because it is a legume, it can fix nitrogen in the soil, which improves the quality of the ground for surrounding vegetation. Maintenance is minimal since it can handle poor soil conditions and resists many common pests.
This hardy perennial is often used in land reclamation and for stabilizing soil in erosion-prone areas.
What parts of this plant are used medicinally?
This plant Lotus corniculatus offers medicinal benefits through its aerial parts, which include the flowers, leaves, and pods, as well as its roots. The yellow flowers and green leaves are often used in herbal preparations to support digestive health and reduce inflammation. The seed pods can also be harvested for specific therapeutic applications depending on traditional practices. Additionally, the roots contain various compounds that contribute to the overall medicinal profile of the species. These various components work together to provide a wide range of potential healing properties.
According to a study published by "Natural product research", all fractions of the aerial parts of Lotus corniculatus L. showed significant antioxidant and immunostimulant activities and could strongly induce lymphoproliferation. The light petrol fraction of the plant exhibited antifungal activity with an IC50 value of <8 µg/mL. This fraction also showed the strongest in-vitro antiprotzoal activity against Trypanosoma with an IC50 value of 0.98 µg/mL and against Plasmodium with 100% inhibition using a sample concentration of 15866.7 ng/mL. Through this approach, eight compounds were isolated, including vestitol (1), kaempferol (2), afzelin (3), kaempferitin (4), kaempferol-3-O-[β-D-xylopyranosyl (1″'→2″)-β-D-galactopyranoside] (5), 3-O-[β-D-glucuronopyranosyl] soyasapogenol B (6), kaempferol-3-O-[β-D-xylopyranosyl (1″'→2″)-β-D-galactopyranoside]-7-O-α-L-rhamnopyranoside (7), and soyasaponin I (8).
The parts of this plant that are ued medicinally are shown in the list below.
- aerial parts
- flowers
- leaves
- pods
- roots
What traditional systems uses this plant?
This plant, known as Lotus corniculatus or bird's-foot trefoil, has been utilized in various traditional medicine systems to treat inflammatory conditions and digestive ailments. In Traditional Chinese Medicine, specific parts of the plant are sometimes integrated into herbal formulations to address issues related to blood circulation and heat. Historical European folk medicine also employed the plant as a remedy for skin irritations and respiratory discomfort. Its high content of saponins and flavonoids has contributed to its long-standing reputation as a therapeutic agent in these ancient practices. These diverse applications highlight the plant's significant role in regional botanical knowledge throughout history.
According to a study published by "Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica", the roots of Lotus corniculatus are used in traditional Chinese medicine to treat various diseases. These historical uses include treating coughing due to wind-heat, fever due to Yin deficiency, eczema, and hemorrhoids. Recent pharmacological studies have identified that flavonoids in the plant, such as (-) -vestitol, exhibit antiviral, anticancer, and anti-inflammatory activities. Despite these uses, the exploitation of resources for Lotus corniculatus has been limited by the low content of these substances in plants and the high difficulty of chemical synthesis.
The hystorical systems that uses this plant are shown in the list below.
- Traditional Chinese Medicine
What are the pharmacological activities of Lotus corniculatus?
This plant has anti-inflammatory, antibacterial, antioxidant, antifungal, and anthelmintic pharmacological activities. Its rich concentration of bioactive compounds allows it to effectively neutralize free radicals and reduce oxidative stress in biological systems. The extract also demonstrates the ability to inhibit the growth of various pathogenic bacteria and fungi. Additionally, these chemical constituents work to suppress inflammatory responses and disrupt the life cycles of parasitic worms. These diverse therapeutic properties suggest that the species holds significant potential for developing new medicinal treatments.
According to a study published by "Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica", the roots of Lotus corniculatus are used in traditional Chinese medicine to treat various diseases including coughing due to wind-heat, fever due to Yin deficiency, eczema, and hemorrhoids. Pharmacological studies have revealed that flavonoids in Lotus corniculatus, such as (-) -vestitol, exhibit antiviral, anticancer, and anti-inflammatory activities. Research investigated the catalytic mechanism of pterocarpan reductase (PTR) involved in the biosynthesis of these substances. The catalytic process is driven by the abstraction of the hydrogen atom of the hydroxyl group on the A-ring of the substrate. Other amino acid residues, including isoleucine (Ile), phenylalanine (Phe), and tyrosine (Tyr), play crucial roles in the catalytic process through hydrophobic interactions, π-π stacking effects, and hydrogen bonding interactions.
The primary pharmacological activities of this plant are shown in the list below.
- anti-inflammatory
- antibacterial
- antifungal
- antioxidant
- anthelmintic
What medicinal compounds this plant contains?
This plant contains the specific medicinal compound (-)-vestitol along with various flavonoids, kaempferol, proanthocyanidin, and tannin. These chemical constituents contribute to the plant's overall therapeutic potential and biological activity. The presence of flavonoids like kaempferol suggests significant antioxidant properties within the species. Furthermore, the combination of proanthocyanidin and tannin provides astringent qualities that are often studied in botanical medicine. These diverse phytochemicals work together to define the pharmacological profile of Lotus corniculatus.
According to a study published by "Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica", the roots of Lotus corniculatus are used in traditional Chinese medicine to treat diseases like eczema, hemorrhoids, coughing due to wind-heat, and fever due to Yin deficiency. Pharmacological studies show that flavonoids in the plant, such as (-) -vestitol, exhibit antiviral, anticancer, and anti-inflammatory activities. The study investigated the catalytic mechanism of pterocarpan reductase (PTR) involved in the biosynthesis of these substances. Key amino acid residues including lysine (Lys), isoleucine (Ile), phenylalanine (Phe), and tyrosine (Tyr) play crucial roles in the catalytic process. This research provides a structural basis for understanding PTR and the biosynthetic pathways of isoflavonoids in Lotus corniculatus.
The primary medicinal compounds of this plant are shown in the list below.
- (-)-vestitol
- flavonoids
- kaempferol
- proanthocyanidins
- tannin
What health conditions is this plant used for?
This plant is used for treating gastrointestinal parasitism caused by Dictyocaulus viviparus and various other gastrointestinal nematodes. It serves as a natural remedy to help combat the presence of lungworm in livestock. The bioactive compounds within the plant target the life cycles of these harmful organisms. By reducing the burden of gastrointestinal nematodes, the plant supports overall digestive health. This makes it an effective tool against the complications of gastrointestinal parasitism.
According to a study published by "The Veterinary record", tannins extracted from Lotus corniculatus were evaluated for their inhibitory activity against the L1 and L3 stages of Dictyoaucus viviparus and the L3 stage of deer gastrointestinal nematodes. When larvae were incubated at 37 degrees C at the highest concentration of 1200 microg/ml, the tannins from Lotus corniculatus showed 35 per cent activity against ensheathed L1 lungworm larvae. A similar trend with lower activities was observed when the larvae were incubated at 22 degrees C. The study also measured the death rate of ensheathed L3 larvae after incubation for two, 24, and 48 hours at 22 degrees C. While the death rate was significantly higher (P<0.001) after 48 hours of incubation, Lotus corniculatus followed other forage plants in inhibitory activity against both L3 lungworm larvae and L3 larvae of gastrointestinal nematodes.
The main health conditions this plant is used for are shown in the list below.
- Dictyocaucus viviparus
- gastrointestinal nematode
- gastrointestinal nematodes
- gastrointestinal parasitism
- helminthes
What are the herbal preparations of this plant?
This plant is Lotus corniculatus and is used to create medicinal preparations including ethyl acetate extracts, methanol extracts, and condensed tannins. These specific chemical compounds are extracted to harness the plant's various bioactive properties for therapeutic use. The methanol extracts often serve as a starting point for isolating diverse phytochemicals due to their high solubility. Researchers also utilize ethyl acetate extracts to target specific non-polar constituents that contribute to the plant's biological activity. Furthermore, the isolation of condensed tannins provides important antioxidant and astringent qualities essential to many herbal formulations.
According to a study published by "Molecules (Basel, Switzerland)", the aerial parts of Lotus corniculatus L. subsp. corniculatus are used in Turkish traditional medicine as a painkiller, antihemoroidal, diuretic, and sedative. Researchers prepared extracts from these aerial parts using water, n-Hexane, ethyl acetate, and methanol. The MeOH extract of the aerial parts showed a remarkable in vivo antidepressant effect when tested through 3 different in vivo models and in vitro monoamine oxidase-A and B inhibition assays. Bioassay-guided fractionation of the active fraction led to the isolation of 3 compounds. These isolated compounds, which include medicarpin-3-O-glucoside, gossypetin-3-O-glucoside, and naringenin-7-O-glucoside (prunin), could be responsible for the activity.
The main herbal preparations of this plant are shown in the list below.
- ethyl acetate extract
- methanol extracts
- condensed tannins
What side effects this plant can have?
This plant can cause several adverse health effects including a diuretic effect, hemorrhoids, increased cystine entering the plasma, pain, and depression. The diuretic effect may alter fluid balance in the body, potentially leading to dehydration if not monitored. Some individuals might experience the development or aggravation of hemorrhoids after consumption. Metabolic changes can occur, specifically characterized by increased cystine entering the plasma. Furthermore, users may suffer from physical pain or psychological symptoms such as depression.
According to a study published by "Molecules (Basel, Switzerland)", the aerial parts of Lotus corniculatus L. subsp. corniculatus are used in Turkish traditional medicine as a painkiller, antihemoroidal, diuretic, and sedative. This research investigated the antidepressant potential of extracts prepared from the aerial parts using water, n-Hexane, ethyl acetate, and methanol. To test this potential, researchers utilized 3 different in vivo test models on male BALB/c mice, including a tail suspension test, antagonism of tetrabenazine-induced hypothermia, ptosis, and suppression of locomotor activity, alongside a forced swimming test. The MeOH extract showed a remarkable in vivo antidepressant effect, which was linked to the isolation of 3 compounds. These active compounds were identified as medicarpin-3-O-glucoside, gossypetin-3-O-glucoside, and naringenin-7-O-glucoside (prunin).
The main side effects this plant can have are shown in the list below.
- diuretic effect
- hemorrhoids
- increased cystine entering the plasma
- pain
- depression
What herbs are paired with Lotus corniculatus?
This plant, commonly known as bird's-foot trefoil, pairs most effectively with aromatic herbs such as thyme, lavender, and chamomile to enhance its delicate, honey-like floral notes.
When used in culinary blends, its mild sweetness complements the earthy tones of rosemary and the citrusy brightness of lemon balm. In medicinal tea formulations, it is frequently combined with peppermint or lemon verbena to soothe the digestive system. These combinations work well because the subtle profile of the trefoil acts as a grounding base for more pungent herbal flavors.
Integrating it into a garden landscape also allows it to thrive alongside pollinator-friendly perennials like sage and oregano.