Murdannia semiteres, the panicled dewflower, is a species of flowering plant in the family Commelinaceae. It is an annual erect herb with reddish branches that grows in the seasonally dry tropical biome. The leaves are threadlike, folded, and smooth. It bears blue flowers in panicles with three free sepals. It is native to east-central Africa (Democratic Republic of the Congo, Uganda, Kenya, Rwanda, Burundi, Tanzania, and Zambia), Yemen, Iran, India, and Vietnam.
Grows gregariously in habitats near permanently moist, exposed rocks and along stream banks in peninsular India.
Four subspecies are accepted.