Muniria angustisepala is a species of flowering plant in the family Melastomataceae. It is a small shrub that can grow up to 1 meter tall. The leaves are elliptic to oblong-elliptic, with a length of 6-10 cm and a width of 2-4 cm. The flowers are pink and have a diameter of 1 cm. The fruit is a capsule that contains many small seeds.