Catalpa ovata
What's the taxonomical classification of Catalpa ovata?
Catalpa ovata 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. Following its hierarchical progression, the plant is placed in the order Lamiales and falls within the family Bignoniaceae. Finally, its specific taxonomic identity is defined by the genus Catalpa and the species ovata.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Lamiales |
| Family | Bignoniaceae |
| Genus | Catalpa |
| Species | ovata |
What are the morphological characteristics of this plant?
Catalpa ovata has large, heart-shaped leaves that can reach up to 10 inches in length and are arranged oppositely on woody, grayish-brown branches. These broad leaves feature smooth margins and a prominent vein pattern that radiates from the base. The tree produces clusters of fragrant, white, bell-shaped flowers that emerge in early summer. Following the bloom, long, slender, bean-like seed pods develop and hang from the branches. The overall structure of the plant is characterized by a spreading canopy and a somewhat irregular crown.
What is the geographical distribution of this plant?
This plant is native to the southeastern United States, spanning from eastern Texas and Oklahoma across the Deep South to Florida and north into the Carolinas. It typically thrives in the moist, fertile soils found throughout the coastal plains and river valleys of this region. While its natural range is concentrated in the warm, humid climate of the South, it has been widely introduced to other temperate zones across North America. Culturally, it is frequently planted in urban landscapes and parks from the Midwest to the Mid-Atlantic due to its ornamental value. This expanded distribution allows it to exist in many areas far beyond its original evolutionary home.
How is this plant cultivated?
This plant, Catalpa ovata, thrives best in moist, well-drained soils within USDA hardiness zones 4 through 8 when provided with full sun or partial shade.
To ensure successful growth, gardeners should plant these trees in areas with sufficient space to accommodate their large, heart-shaped leaves and spreading canopy. Regular watering is essential during the establishment period to help the young root systems settle into the ground. While they are relatively hardy, applying a layer of organic mulch around the base helps retain soil moisture and suppresses competing weeds.
Once mature, these trees are quite resilient and require minimal supplemental fertilization to maintain their health.
What parts of this plant are used medicinally?
This plant, Catalpa ovata, provides medicinal utility through its fructus, root, shoots, stem, and stem-bark. The fructus and root are often utilized in traditional practices to address various systemic ailments. Young shoots and the tender stem can be processed to harness specific bioactive compounds for therapeutic use. Additionally, the stem-bark contains chemical constituents that contribute to the plant's overall medicinal profile. These different components are frequently studied for their potential pharmacological properties in herbal remedies.
According to a study published by "Chemical & pharmaceutical bulletin", the water extract from Catalpae Fructus originated from Catalpa ovata G. DON (Bignoniaceae) contains a mutagenic principle. This specific part of the plant was used to isolate and characterize a new iridoid named catalpin. The iridoid exhibited mutagenic activity towards Salmonella typhimurium strain TA100. This activity was observed in the presence and absence of rat liver homogenate (S9) mix in Ames' test.
The parts of this plant that are ued medicinally are shown in the list below.
- fructus
- root
- shoots
- stem
- stem-bark
What traditional systems uses this plant?
This plant, Catalpa ovata, has been utilized in various historical contexts for its medicinal properties, most notably within Traditional Korean Medicine. In these traditional practices, different parts of the tree, such as the bark or leaves, were often prepared to address specific ailments. Historical accounts suggest that its components were used to treat issues related to inflammation or respiratory discomfort. Beyond its medicinal applications, the wood has also been valued in various cultures for its durability in construction and tool making. These diverse uses reflect the long-standing relationship between human communities and the botanical characteristics of the species.
According to a study published by "Journal of ethnopharmacology", the stem bark of Catalpa ovata G. Don. (Bignoniaceae) is used as an anti-inflammatory drug in traditional Korean medicine. This folk medicine is investigated for its effects on the productions of tumor necrosis factor-alpha (TNF-alpha) and nitric oxide (NO). The study specifically examines the methanol extract of the stem bark on RAW 264.7 macrophages activated with the endotoxin lipopolysaccharide. The extract inhibited the productions of TNF-alpha and NO with significant decreases in mRNA levels of TNF-alpha and inducible NO synthase. These results suggest that the stem bark of Catalpa ovata may have therapeutic potential in the control of inflammatory disorders.
The hystorical systems that uses this plant are shown in the list below.
- Traditional Korean Medicine
What are the pharmacological activities of Catalpa ovata?
This plant has anti-inflammatory, antitumor-promoting, inhibition of inducible nitric oxide synthesis, and mutagenic activity. Research indicates that specific extracts from Catalpa ovata can suppress the production of nitric oxide by targeting inducible nitric oxide synthase. These chemical properties contribute to its observed ability to modulate inflammatory responses within biological systems. Furthermore, studies have investigated its potential to influence tumor growth and cellular development. However, investigations also highlight that certain components may exhibit mutagenic activity in specific testing models.
According to a study published by "Journal of ethnopharmacology", the methanol extract of the stem bark of Catalpa ovata G. Don. (Bignoniaceae) was investigated for its effects on RAW 264.7 macrophages activated with the endotoxin lipopolysaccharide. This extract inhibited the productions of tumor necrosis factor-alpha (TNF-alpha) and nitric oxide (NO). The study observed significant decreases in mRNA levels of TNF-alpha and inducible NO synthase. These inhibitory effects suggest that the stem bark of Catalpa ovata may have therapeutic potential in the control of inflammatory disorders.
The primary pharmacological activities of this plant are shown in the list below.
- anti-inflammatory
- antitumor-promoting
- inhibition of inducible nitric oxide synthesis
- mutagenic activity
What medicinal compounds this plant contains?
This plant contains the medicinal compounds catalpalactone, catalpin, catalposide, cis-verbascoside, and trans-verbascoside. These specific chemical constituents contribute to the unique biological profile of Catalpa ovata. Researchers often study these substances to understand their potential pharmacological activities and therapeutic properties. The presence of these diverse molecules highlights the complex chemical composition of the species. Understanding these compounds is essential for exploring the plant's role in traditional and modern medicine.
According to a study published by "Journal of natural products", bioassay-directed fractionation of an extract of the stem-bark of Catalpa ovata led to the isolation of 3 new naphthoquinones, which are 8-methoxydehydroiso-alpha-lapachone (1), 9-methoxy-4-oxo-alpha-lapachone (2), and (4S,4aR,10R,10aR)-4, 10-dihydroxy-2,2-dimethyl-2,3,4,4alpha,10, 10alpha-hexahydrobenzo[g]chromen-5-one (3). The compound (3) is a 1,4-reductive form of 6. Other isolated compounds include 3-hydroxydehydroiso-alpha-lapachone (4), 4,9-dihydroxy-alpha-lapachone (5), 4-hydroxy-alpha-lapachone (6), 9-methoxy-alpha-lapachone (7), and catalpalactone (8). These compounds all exhibited significant inhibitory activity against 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced Epstein-Barr virus early antigen (EBV-EA) activation in Raji cells.
The primary medicinal compounds of this plant are shown in the list below.
- catalpalactone
- catalpin
- catalposide
- cis-verbascoside
- trans-verbascoside
What health conditions is this plant used for?
This plant is used for treating atopic dermatitis, dermatitis, hyperkeratosis, inflammatory diseases, and inflammatory disorders. The extracts from Catalpa ovata possess significant medicinal properties that help soothe irritated skin surfaces. These botanical compounds work to manage the symptoms associated with various chronic inflammatory diseases. By applying these natural elements, practitioners aim to mitigate the discomfort found in complex inflammatory disorders. This approach provides a specialized method for addressing skin thickening and related hyperkeratosis.
According to a study published by "Journal of ethnopharmacology", the stem bark of Catalpa ovata has been used as a traditional herbal medicine for the treatment of various inflammatory diseases such as itching and scabies. This study specifically investigated its effects on Dermatophagoides farinae-induced atopic dermatitis in a NC/Nga mouse model. The research assessed various factors including dermatitis score, histology, serum total IgE, and several cytokines and chemokines. The results showed that Catalpa ovata extract significantly inhibited serum total IgE, Th2 cytokines IL-4, IL-5 and IL-13, and pro-inflammatory cytokines IL-1β, IL-6 and TNF-α. Furthermore, the extract inhibited the Th2 chemokine TARC and the pro-Th2 cytokine TSLP.
The main health conditions this plant is used for are shown in the list below.
- atopic dermatitis
- dermatitis
- hyperkeratosis
- inflammatory diseases
- inflammatory disorders
What are the herbal preparations of this plant?
This plant is used to create medicinal herbal preparations such as Catalpa ovata extract, decoctions, and tinctures that target respiratory and inflammatory conditions. These preparations often utilize the bark or leaves to harness the plant's specific chemical constituents. When processed into a concentrated Catalpa ovata extract, the active compounds become more accessible for therapeutic use. Practitioners may also prepare aqueous infusions for gentle internal applications. Such diverse methods allow for varied dosing and absorption rates depending on the intended health goal.
According to a study published by "Journal of ethnopharmacology", the stem bark of Catalpa ovata has been used as a traditional herbal medicine for the treatment of inflammatory diseases such as itching and scabies. Researchers investigated the topical effects of Catalpa ovata extract (COE) on skin lesions in NC/Nga mice using five category-experiments. The clinical dermatitis score was significantly lower in the COE groups compared to the control group. Histological analysis showed that COE inhibited hypertrophy, hyperkeratosis of the epidermis, and intracellular edema while reducing inflammatory cell infiltration. COE significantly inhibited serum total IgE, Th2 cytokines IL-4, IL-5 and IL-13, pro-inflammatory cytokines IL-1β, IL-6 and TNF-α, the Th2 chemokine TARC, and the pro-Th2 cytokine TSLP. Further investigation is needed to determine the appropriate COE dosage and evaluate the safety of this medicinal herb.
The main herbal preparations of this plant are shown in the list below.
- Catalpa ovata extract
What side effects this plant can have?
This plant can cause nausea, vomiting, abdominal pain, diarrhea, and skin irritation if consumed or touched. Ingesting parts of the tree often leads to significant gastrointestinal distress characterized by stomach cramping and digestive upset. These internal symptoms typically manifest shortly after exposure to the plant's toxic compounds. Beyond digestive issues, contact with the foliage or bark can trigger localized skin irritation or allergic reactions. It is important to avoid all contact to prevent these unpleasant health side effects.
The main side effects this plant can have are shown in the list below.
- Nausea
- Vomiting
- Abdominal pain
- Diarrhea
- Skin irritation
What herbs are paired with Catalpa ovata?
This plant pairs most effectively with aromatic herbs such as peppermint, lemon balm, and lavender to enhance its subtle floral notes.
When used in culinary or medicinal infusions, the slight bitterness of Catalpa ovata is balanced by the refreshing qualities of mint species. Adding lemon balm introduces a citrusy brightness that complements the tree's delicate scent profile. Lavender can also be integrated to create a soothing, herbaceous blend suitable for topical or aromatic preparations.
These combinations help to harmonize the plant's unique chemical properties with more familiar garden flavors.