Knob grass, scientifically known as Tragia involucrata, is a perennial plant belonging to the family Euphorbiaceae. This plant is native to tropical regions, particularly found in India, Southeast Asia, and Africa. It is commonly known by other names such as coat button plant, hairy euphorbia, and climbing nettlespur.
Knob grass typically grows in trellises, hedges, and wastelands, and it has a climbing habit due to its long, twining branches that can reach up to 4 meters in length. The stems are covered with tiny, hooked spines that aid the plant in climbing and attaching itself to nearby vegetation. The leaves of knob grass are alternate, roughly heart-shaped, with serrated edges, and covered with fine hairs.
This plant is admired for its decorative and ornamental value, especially for its clusters of greenish-white flowers that bloom in the summer months. The flowers are small but densely packed, forming attractive rounded inflorescences. Knob grass produces small, three-lobed fruits that contain seeds, which are dispersed by birds and other animals.
In traditional medicine, knob grass has been used for various therapeutic purposes. It is known to possess diaphoretic, diuretic, and anti-inflammatory properties. The leaves and roots of this plant are often used in the preparation of herbal remedies to treat ailments such as urinary tract infections, edema, rheumatism, and skin irritations.
However, it is important to note that knob grass contains toxic compounds, particularly in its leaves, that can cause skin irritation and allergies. Caution should be exercised while handling this plant, and it is recommended to seek professional advice before using it for medicinal purposes.
