Vasaka, Malabar nut (Adhatoda Vasica) – Uses, Benefits, Dosage and Properties Plant Description Vasaka is tall, dense, evergreen herbaceous shrub. Trunk of this shrub has numerous, long, opposite and ascending branches. This plant contains yellow colored bark. Leaves are lance shaped, oppositely arranged and smooth edged with short petioles. Leaves are bitter tasting and when dried color changes to dull brownish green. The leaves are rich in alkaloid compound vasicine. Inflorescence show dense, large and auxiliary spikes and flowers are