Kardomia odontocalyx is a shrub to high with linear shaped leaves long, wide, rounded or notched at the apex, margins smooth, oil glands on the lower surface and on a petiole about long. The flowers are borne singly on a pedicel |peduncle long and the [bract">peduncle (botany)">peduncle long and the [bracteoles linear-shaped and about long. The corolla up to in diameter and the white petals about long. The fruit is a capsule about in diameter.