A. nervosa is a large woody climber and the plant can reach up to a height of 10 m or more. The stem of this plant is white and tomentose, the thickness of the mature stem is 25 mm with vertical ridges and several lenticels that are transversely elongated. It comprises of a large, alternate, long petiole, simple, acute, ovate, glabrous, silver-coloured heart-shaped leaves with a smooth appearance on the upper sides and beautiful silky hairs from the lower side. These leaves are 5-15 cm in length, while the leaf blade is 20-25 cm broad and 20-30 cm long. The flowers are large violet or lavender, funnel-shaped, sub capitate formed in the cluster. Black coloured seeds are present inside the pods of dried flowers. The fruit is smooth globose, yellowish-brown, round or berry-like, containing brown seeds. Three to five seeds are present in each flower pod. The roots of this plant vary in thickness. Usually, thin roots are 2-4 mm in diameter and the thick roots are 5-25 mm in diameter with a rough exterior because of the presence of lenticels. The seeds are more or less triangular with 0.5 to 0.75 cm in length and 5 mm in breadth.
of this plant is mentioned in the Nighantu grants. It is also mentioned in Trikona Kanda in Ashtanga Sangraha. Vrddhadaru has been described in Karcveeradi Varga by Dhanvantri Nighantu.
Kaphavatashamak: It alleviates the vitiated Kapha and Vata doshas of the body. Santhanik karam: The plant is associated with wound healing property, helps in blood purification. Abhyantranadisansthan: It strengthens the nerves, cures the CNS's weakness, beneficial for body aches and has nootropic action. Pachansansthan: It helps in curing constipation, piles, indigestion, increases flatulence and act as an appetizer and laxative. Raktavahsansthan: It is used to treat heart disorders and acts as a cardiotonic and anti-inflammatory agent. Shvasansansthan: It is used to treat hoarseness of voice, cough, cold and beneficial for throat. It acts as an antitussive agent. Prajanansansthan: It is used to treat sexual disorders of men, leucorrhea and acts as a uterine tonic. It is associated with aphrodisiac property. Mutravahsansthan: It acts as an antidiabetic agent. Saatmikaran: It acts as a rejuvenator