flower and seed of Leucas aspera Willd. 
flower of Leucas aspera plant 
leaves of Leucas aspera plant 
Leucas aspera plant 
Leucas aspera Willd. plant 
Thumba plant
Leucas aspera is an annual herb within the genus Leucas and the family Lamiaceae. The plant is easily visible throughout Assam. The Assamese common names is দ্ৰোণ, দুৰুণ (Dron, Durun). Other common names are Common Leucas, Thumbai or Thumba, Ghal Ghase (in Bengali), Chota Halkusa, Gopha (in Hindi), Dronapushpi (in Sanskrit). The species has many different common names depending on the region. It is known for its various uses in the fields of medicine. Leucas aspera grows in dry, open, and sandy soil.Leaves of the plant is opposite, subsessile or short petioled, linear or narrowly oblong- lanceolate, entire or distantly crenate, obtuse, narrowed at the base. Flowers of Leucas are white, small. The Leucas is popular herbal medicine and develop the immunity of body to fight diseases. Leucas aspera have antifungal, prostaglandin inhibitory, antioxidant, antimicrobial, antinociceptive and cytotoxic activities.
Classification of Leucas aspera
Kingdom : Plantae
Phylum : Tracheophyta
Class : Magnoliopsida
Order : Lamiales
Family : Lamiaceae
Genus : Leucas
Species : Leucas aspera (Willd.) Link