Digitalis plant
Digitalis plant is a genus in the family Plantaginaceae. It includes several species, of which the most well-known medicinal plant is D. purpurea, commonly known as foxglove. These plants are native to Europe, parts of Asia. and some areas in North Africa.
Digitalis is a herbaceous plant that can grow up to 1.5 meters tall. The plants are biennial or perennial, Leaves are alternate and basal, and form a rosette at the base of the plant. The flowers of Digitalis are arranged in a spike or raceme. The plants are characterized by their tall, showy spikes of tubular flowers with a characteristic bell or foxglove shape, having a wider opening at the tip. Flowers can be purple, white, yellow, or pink, depending on the species. Foxgloves are commonly grown as ornamental plants in gardens because of their striking flowers. Digitalis produces a capsule as its fruit, which contains multiple seeds.
Systematic Position
| Taxonomic Rank | Classification |
| Kingdom | Plantae |
| Division | Angiosperms |
| Class | Dicotyledons |
| Order | Lamiales |
| Family | Plantaginaceae |
| Genus | Digitalis |
| Species | D. purpurea |
Botanical Characteristics
- Herbaceous biennial or perennial, up to 1.5 m tall
- Leaves: alternate and basal, forming a rosette at base
- Flowers: tubular, bell-shaped, arranged in spikes; colors vary (purple, white, yellow, pink)
- Fruit: capsule containing multiple seeds
Active Compounds
- Cardiac glycosides: digitoxin and digoxin
- Mechanism: inhibit Na\textsuperscript{+}/K\textsuperscript{+} ATPase, increasing intracellular calcium in heart cells, strengthening contractions and regulating rhythm
Medicinal Uses
- Treatment of heart diseases including arrhythmias and heart failure
- Digoxin remains in clinical use for cardiac conditions
Toxicity and Risks
- Highly toxic if overdosed; can cause arrhythmias, vomiting, and severe side effects
- Requires strict medical supervision in treatment