Ram Tulsi, also known as Ocimum gratissimum, is a type of basil with a strong, pungent flavor and fragrant leaves. It's a fast-growing herb, often cultivated for its culinary, medicinal, and aromatic properties. It's a perennial, woody at the base, and can grow to 1-3 meters tall. The leaves are hairy, ovate, and toothed, with a wedge-shaped base. The flowers are greenish-white to greenish-yellow. It's also known as Holy Basil and is widely recognized for its medicinal and spiritual significance in India. 

Here's a more detailed description:

Botanical Features:

Plant Type: Perennial herb, often woody at the base. 

Height: Can grow to 1-3 meters tall. 

Leaves: Hairy, broadly to narrowly ovate, 5-13 cm long and 3-9 cm wide, with a toothed margin and a wedge-shaped base. 

Flowers: Greenish white to greenish-yellow, 4-7 mm long. 

Stems: Hairy, erect, and multi-branched. 

Other Characteristics:

Aroma: Leaves have a strong, pungent, and aromatic scent when crushed or brushed against. 

Flavor: Clove-like, with a hint of sweetness and spiciness. 

Growth: Requires well-draining soil, full sun, and moderate watering. 

Medicinal Properties: Known for its antioxidant, anti-inflammatory, and antimicrobial properties. 

Cultural Significance: Highly revered in Hinduism and used in religious ceremonies.