Thumba plant or Leucas aspera- the traditional flower of Kerala

Leucas aspera is a species within the Leucas genus and the Lamiaceae family. Although the species has many different common names depending on the region in which it is located, it is most commonly known as Thumbai. Found throughout India, it is known for its various uses in the fields of medicine and agriculture.

leusas aspera is reported to have antifungal, prostaglandin inhibitory, antioxidant, antimicrobial, antinociceptive and cytotoxic activities. Leusas aspera is used in the traditional medicine of the Philippines to treat scorpion bites. It is also an antipyretic, it is a herb that has the ability to help reduce fevers.

In some forms of traditional medicine, the steam formed by crushing the Samoolam, also known as the plant's flowers, seeds, roots, berries, bark or leaves, can be inhaled to help treat nasal congestion, coughing, cold, headache and fever. In addition the juices of the flower can be extracted and used to help treat sinusitis, as well as headaches. The juice of the flowers can also be used to treat intestinal worms in children.