Symphytum officinale
What's the taxonomical classification of Symphytum officinale?
Symphytuum officinale belongs to the kingdom Plantae and is classified under the phylum Streptophyta. Within this lineage, it is categorized under the class Equisetopsida and the subclass Magnoliidae. Its taxonomic progression continues through the order Boraginales and the family Boraginaceae, eventually reaching its specific designation within the genus Symphytum. Finally, the plant is identified at the species level as officinale.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Boraginales |
| Family | Boraginaceae |
| Genus | Symphytum |
| Species | officinale |
What are the morphological characteristics of this plant?
Symphytum officinale has a thick, fleshy rhizome from which grows a basal rosette of large, lanceolate leaves that feature bristly, hairy surfaces and rugose textures. The stems are erect and hairy, often reaching heights of up to one meter as they transition from the base to the flowering portion. Leaves arranged alternately along the stem are typically much smaller than the basal ones and possess entire or slightly wavy margins. The inflorescence is a drooping cyme containing bell-shaped flowers that range in color from creamy white to pale yellow. Each flower is characterized by a tubular corolla and is surrounded by small, hairy sepals.
What is the geographical distribution of this plant?
This plant is native to much of Europe, western Asia, and parts of northern Africa, typically thriving in temperate climates. Its range extends across a vast expanse from the British Isles through central Europe and into the colder regions of Russia. While primarily found in the wild across the Eurasian continent, it has been widely naturalized in North America due to human introduction. It commonly populates moist habitats such as riverbanks, damp woodlands, and meadow edges within these regions. The species continues to spread wherever soil moisture and moderate temperatures are consistently available.
How is this plant cultivated?
This plant, known as comfrey, thrives in moist, well-drained soils with high organic matter and requires partial to full sunlight for optimal growth.
It is a vigorous perennial that spreads easily through rhizomes, so it is best cultivated in contained areas or dedicated garden beds to prevent overcrowding. Once established, the deep taproot allows it to access nutrients from lower soil layers, making it an excellent dynamic accumulator for green manure. Regular watering is necessary during dry spells, though the plant is generally quite hardy and resilient once its root system is mature.
Harvesting the leaves for medicinal or horticultural use is most effective during the peak flowering season.
What parts of this plant are used medicinally?
Symphytum officinale contains allantoin and other medicinal compounds primarily concentrated in its rhizomes and roots. These underground parts are harvested and dried to create poultices or extracts used for healing skin tissues. The root extracts are frequently applied topically to soothe bruises, sprains, and minor abrasions. While the leaves can sometimes be used in topical preparations, the concentration of active healing agents is highest in the root system. Because of the presence of pyrrolizidine alkaloids, these medicinal parts are generally restricted to external applications rather than internal consumption.
What are the pharmacological activities of Symphytum officinale?
This plant has analgesic, anti-inflammatory, and tissue regenerating pharmacological activities that facilitate rapid wound healing. Its natural compounds work to provide a significant reduction in pain by inhibiting specific inflammatory pathways in the body. By suppressing swelling and irritation, the plant creates an optimal environment for cellular repair. These properties make it an effective traditional remedy for repairing damaged skin and underlying structures. The combination of these effects ensures that both the physical symptoms and the underlying injury are addressed simultaneously.
According to a study published by "Phytomedicine : international journal of phytotherapy and phytopharmacology", Symphytuim officinale L. is a medicinal plant possessing anti-inflamatory, analgesic and tissue regenerating properties. In a study involving 142 patients with a mean age of 31.8 years, where 78.9% were male, an ointment of comfrey extract applied 4 times per day for 8 days was tested. The active treatment was superior to placebo in reducing pain, with a tonometric measurement of p<0.0001, and reducing ankle edema using the figure-of-eight method with a p = 0.0001. Statistical differences were also shown for ankle mobility via the neutral zero method and global efficacy. No adverse drug reactions were reported under the active treatment.
The primary pharmacological activities of this plant are shown in the list below.
- analgesic
- anti-inflammatory
- reduction in pain
- tissue regenerating
- wound healing
What medicinal compounds this plant contains?
This plant contains allantoin, pyrrolizidine alkaloids, symphythine, rosmarinic acid, and various phenolic acids. Allantoin is a key component known for its ability to promote cell proliferation and tissue regeneration in skin wounds. The presence of symphythine, a specific pyrrolizidine alkaloid, requires careful handling due to potential toxicity concerns. Additionally, the plant provides rosmarinic acid and other phenolic acids that contribute significant antioxidant and anti-inflammatory properties. These diverse chemical constituents work together to define the medicinal profile and therapeutic limitations of the species.
According to a study published by "Journal of intercultural ethnopharmacology", Symphytuum officinale contains flavonoids and allantoin. Comfrey extracts are prepared at a concentration of 1% w/v using distilled water, ethanol, and methanol. The study examined the effects of UV-A, UV-B, and UV-C radiation for a duration of 10 min. UV irradiation reduces the magnitude of the principle peak at the 355 nm wavelength for aqueous infusion and methanol extracts. Specifically, UV radiation increases the levels of allantoin in aqueous and methanol extracts while improving the flavonoids and reducing power of aqueous extracts. Conversely, UV-radiation reduces the levels of flavonoids, reducing power, and allantoin when the comfrey is extracted by alcohols.
The primary medicinal compounds of this plant are shown in the list below.
- allantoin
- pyrrolizidine alkaloids
- symphytine
- rosmarinic acid
- phenolic acids
What health conditions is this plant used for?
This plant is used for bone healing, cutaneous wound healing, skin lesions or wounds, wound healing, and various types of wounds. It contains allantoin, a compound that promotes the regeneration of cells and tissues. This property makes it particularly effective for accelerating the repair of cutaneous wound healing. The botanical extracts are frequently applied topically to treat skin lesions or wounds. Through its soothing properties, it effectively supports the overall process of wound healing.
According to a study published by "Journal of ethnopharmacology", Symphytuum officiinale is a medicinal plant believed in homeopathic literature to accelerate bone healing. The study aimed to determine if homeopathic doses of Symphytuum officinale, including MT, 3C, 6C, 12C, and 30C, could augment osteogenesis in mesenchymal stem cells as they differentiate into osteoblasts in vitro. Bone marrow samples were obtained from n = 15 patients to isolate cells that were 93-98% characterized by CD90 and CD105. Testing via MTT assay showed that selected doses did not induce cytotoxicity in MSCs over 24 hours. In evaluations involving n = 10 for osteocalcin and n = 10 for Runx-2, Osteopontin, and Osteocalcin gene expression, as well as n = 8 for alkaline phosphatase activity, the addition of Symphytuum officinale to basic differentiation medium enhanced osteogenesis.
The main health conditions this plant is used for are shown in the list below.
- bone healing
- cutaneous wound healing
- skin lesions or wounds
- wound healing
- wounds
What are the herbal preparations of this plant?
This plant can be prepared as a tincture, ointment, salve, cream, extract, infusion, decoction, or poultice for various medicinal applications. A topical salve or cream is frequently used to soothe skin irritations, while a concentrated tincture or extract serves as a potent liquid dose. For external injuries, a moist poultice made from the crushed leaves can be applied directly to the area. One might also drink a gentle infusion for mild internal support or a stronger decoction made from the roots. These diverse preparations allow for both systemic and localized use of the plant's properties.
The main herbal preparations of this plant are shown in the list below.
- Tincture
- Poultice
- Ointment
- Salve
- Cream
- Extract
- Infusion
- Decoction
What side effects this plant can have?
This plant can cause severe liver damage and hepatotoxicity due to the presence of pyrrolizidine alkaloids. Consuming the plant may lead to gastrointestinal distress, specifically nausea and vomiting. Users might also experience significant abdominal pain during the onset of toxicity. Chronic exposure is known to cause diarrhea and more permanent organ failure. These dangerous side effects make the plant unsafe for internal consumption.
The main side effects this plant can have are shown in the list below.
- Liver damage
- Hepatotoxicity
- Nausea
- Vomiting
- Abdominal pain
- Diarrhea