Barleria lupulina, which is commonly known as hop-head Barleria of Hophead Philippine Violet, is a shrub plant with slightly elongated leaves and thorny stem. The flowers are borne as compact inflorescence at the end of a branch. Side branches can be long at the bottom and shorter at the top. Leaf colour is purplish dark brown and flower petals are yellow. The plant is classified under the Family Acanthaceae.