Barleria cristata

Barleria cristata (Philippine violet, bluebell barleria or crested Philippine violet), is a plant of the Acanthaceae family.

It is native to a wide area ranging from Southern China to India and Myanmar.

Cultivated as an ornamental plant in villages and gardens, it has become naturalized in Hawaii, where it grows in dry habitats. In Fiji, where it is known as "tombithi" and in Christmas Island (Indian Ocean), the shrub grows also as a ruderal species along roadsides and disturbed areas from near sea level to about 100 m.

In Tamil Nadu in South India, it is known as December Poo or December Flower as it blooms in December and is normally strung into garlands of flowers for women to wear in their hair.