Cornus macrophylla
What's the taxonomical classification of Cornus macrophylla?
Cornus macrophylla belongs to the kingdom Plantae and is classified under the phylum Streptophyta. Within the class Equisetopsida, it is situated in the subclass Magnoliidae and falls under the order Cornales. It is a member of the family Cornaceae and is specifically identified within the genus Cornus, where it is designated as the species macrophylla.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Cornales |
| Family | Cornaceae |
| Genus | Cornus |
| Species | macrophylla |
What are the morphological characteristics of this plant?
Cornus macrophylla has large, opposite, simple leaves that typically measure between 10 and 25 centimeters in length and exhibit prominent, arcuate venation. The leaf margins are generally entire or slightly serrated, while the texture can range from smooth to somewhat rugose. This deciduous shrub features woody stems that often develop a spreading or multi-stemmed growth habit. Its small, white, four-petaled flowers are arranged in dense, terminal cymes that emerge in late spring. Following flowering, the plant produces fleshy, globose drupes that transition from green to a deep red or dark purple color upon ripening.
What is the geographical distribution of this plant?
This plant is native to the western regions of North America, spanning from southeastern Alaska through British Columbia and Washington down to California and south into northern Mexico. It thrives primarily in moist, shaded environments such as coniferous forests and riparian zones. Within these habitats, it is often found in montane and subalpine elevations where soil moisture remains consistent. The species is most concentrated along the Pacific Coast Ranges and the Cascade Mountains. Its range extends eastward into the Rocky Mountains, though it is less common in those more arid interior regions.
How is this plant cultivated?
This plant requires well-drained, moist, and organic-rich soil located in partial shade to partial sun to thrive in cultivation.
It performs best when planted in areas that mimic its natural woodland habitat, avoiding intense, direct midday sunlight. Regular watering is essential to maintain consistent moisture levels, especially during periods of extended drought or high heat. Providing a thick layer of mulch around the base helps retain soil moisture and regulates temperature for the root system.
Periodic pruning after flowering can help maintain a desirable shape and encourage vigorous new growth.
What parts of this plant are used medicinally?
This plant, Cornus macrophyllia, is utilized medicinally through its bark and its leaves. The inner bark is often harvested to create decoctions used for treating various ailments. Additionally, the leaves can be prepared as a tea or topical application to address specific health concerns. These different parts contain unique compounds that contribute to their therapeutic potential. Practitioners carefully select the specific plant portion based on the desired medicinal effect.
According to a study published by "Pakistan journal of pharmaceuatical sciences", the methanolic extract from the bark of Cornus macrophylla was investigated for phytochemicals, antioxidant, total phenolic contents and phytotoxic activities. Phytochemical analysis of Cornus macrophylla revealed the presence of tannins, anthraqquinones, glycosides, reducing sugar, saponins and flavonoids. The percent free radicals scavenging potential of DPPH at 20, 40, 60, 80 and 100μg/ml was 72.69%, 73.32%, 73.51, 73.83% and 74.33% respectively. The IC(50) value of Cornus macrophylla was 14.5/μg/ml. The TPC of the methanolic bark extract was 2.916 mg gallic acid equivalents/g of extract. The extract displayed phytotoxic activity and inhibited growth at 1000 μg/ml.
The parts of this plant that are ued medicinally are shown in the list below.
- bark
- leaf
What traditional systems uses this plant?
This plant, commonly known as bigleaf dogwood, was utilized by various Indigenous peoples of the Pacific Northwest for crafting practical items and medicinal preparations.
The inner bark was historically harvested to create infusions used to treat ailments like stomach aches or skin irritations. Many tribes also employed the sturdy, flexible branches to weave baskets or construct small structural components for tools. The wood itself provided a reliable material for carving small implements due to its density and durability.
These traditional practices demonstrate a deep botanical knowledge integrated into daily survival and cultural rituals.
What are the pharmacological activities of Cornus macrophylla?
This plant has anti-inflammatory, antioxidant, aldose reductase inhibition, herbicidal, and phytotoxic pharmacological activities. Its antioxidant properties help neutralize free radicals, while its anti-inflammatory effects reduce swelling and irritation. The ability to inhibit aldose reductase suggests potential utility in managing complications related to diabetes. Furthermore, the species demonstrates herbicidal and phytotoxic qualities that allow it to impact the growth of other vegetation. These diverse biological functions make it a subject of interest for both medicinal and agricultural studies.
According to a study published by "Journal of computer-aided molecular design", Cornus macrophylla has been traditionally recognized for managing inflammatory conditions. A total of ten compounds, including an ellagic acid derivative and nine steroids and triterpenes, were isolated from its bark. The compound 1,2,3-trimethoxychromeno[5,4,3-cde][1,3]dioxolo[4,5-h]chromene-5,11-dione emerged as the most active, demonstrating moderate inhibition of lipoxygenase with an IC50 value of 78.1 ± 0.03 µM. This same compound achieved an IC50 of 298.21 ± 0.037 µM in the suppression of respiratory burst activity in human neutrophils. Molecular docking revealed that this compound interacts with 15-LOX with a binding affinity of -7.038 kcal/mol.
The primary pharmacological activities of this plant are shown in the list below.
- anti-inflammatory
- antioxidant
- aldose reductase inhibition
- herbicidal
- phytotoxic
What medicinal compounds this plant contains?
This plant contains a diverse range of medicinal compounds including flavonoids, glycosides, saponins, tannins, and anthraquinones. These secondary metabolites contribute to the complex chemical profile that defines its biological activity. The presence of flavonoids and tannins often provides significant antioxidant and astringent properties. Additionally, the glycosides and saponins can influence various physiological responses within an organism. Anthraquinones are also present, which are known for their specific pharmacological effects. Together, these substances form a potent chemical toolkit used in traditional applications.
According to a study published by "Pakistan journal of pharmaceuctical sciences", phytochemical analysis of the Cornus macrophylla bark revealed the presence of tannins, anthraqquinones, glycosides, reducing sugar, saponins and flavonoids. The percent free radicals scavenging potential of DPPH at 20, 40, 60, 80 and 100μg/ml was 72.69%, 73.32%, 73.51, 73.83% and 74.33% respectively. The IC(50) value of Cornus macrophylla was 14.5/μg/ml. The total phenolic content of the methanolic bark extract was 2.916 mg gallic acid equivalents/g of extract. Additionally, the extract displayed excellent phytotoxic activity and inhibited growth at 1000 μg/ml.
The primary medicinal compounds of this plant are shown in the list below.
- flavonoids
- glycosides
- tannins
- anthraquinones
- saponins
What health conditions is this plant used for?
This plant is used for treating inflammatory conditions, skin irritations, and various digestive ailments. The bark and leaves contain specific compounds that help reduce swelling and soothe discomfort in the body. It is often applied topically to calm redness or used in decoctions to address internal imbalances. Some traditional practices also utilize it to manage symptoms related to respiratory distress. These medicinal applications rely on the plant's natural astringent and anti-inflammatory properties.
According to a study published by "Journal of computer-aided molecular design", Cornus macrophylla has been traditionally recognized for managing inflammatory conditions. A total of 10 compounds, including 1 ellagic acid derivative and 9 steroids and triterpenes, were isolated from the bark. The most active compound, 1,2,3-trimethoxychromeno[5,4,3-cde][1,3]dioxolo[4,5-h]chromene-5,11-dione, demonstrated an IC50 value of 78.1 ± 0.03 µM for lipoxygenase inhibition. This compound also achieved an IC50 of 298.21 ± 0.037 µM in suppressing respiratory burst activity in human neutrophils. Molecular docking showed this compound has a binding affinity of -7.038 kcal/mol with 15-LOX.
The main health conditions this plant is used for are shown in the list below.
- inflammatory conditions
What are the herbal preparations of this plant?
This plant is used to create medicinal herbal preparations such as ethanol extracts and methanolic extract for various therapeutic applications. These specific solvent-based preparations are designed to isolate bioactive compounds found within the plant tissues. Researchers often utilize ethanol extracts to study the antimicrobial and antioxidant properties of the species. Similarly, methanolic extract serves as a critical tool for identifying the chemical constituents responsible for its biological activity. These different extraction methods allow for a comprehensive understanding of the plant's potential pharmacological benefits.
According to a study published by "Bioscience, biotechnology, and biochemistry", ethanol extracts prepared from Cornus macrophylla were examined for their inhibitory effects on rat lens aldose reductase activity in vitro. Among the plants examined, Cornus macrophylla exerted the most strong inhibitory activity on aldose reductase. This plant was one of the Korean forest plants screened to seek naturally occurring substances that can prevent and treat diabetic complications.
The main herbal preparations of this plant are shown in the list below.
- ethanol extracts
- methanolic extract
What side effects this plant can have?
This plant can cause adverse health reactions including skin irritation, gastrointestinal distress, and potential allergic responses in sensitive individuals. Contact with the leaves or bark may trigger contact dermatitis, resulting in redness or itching on the skin. If ingested, the plant can lead to nausea, vomiting, or abdominal pain. Some people may also experience more severe systemic symptoms if they have a specific hypersensitivity to its chemical compounds. Monitoring any physical changes after exposure is essential for safety.
The main side effects this plant can have are shown in the list below.
What herbs are paired with Cornus macrophylla?
This plant, commonly known as Pacific dogwood, pairs most effectively with aromatic herbs like lavender, sage, and rosemary to complement its large, textured foliage.
These woody herbs create a structural contrast against the broad leaves of the dogwood while thriving in similar temperate garden conditions. Pairing the shrub with flowering perennials such as salvia or mint can also enhance its visual appeal through color coordination. Utilizing these specific herbal companions helps to establish a layered woodland garden aesthetic.
Integrating these species ensures a balanced ecosystem that supports diverse pollinators within your landscape.