Medinilla theresae is an endemic species of flowering evergreen shrub or liana in the family Melastomataceae, occurring on ultramafic soils on the dwarf forests of Mt.

Redondo, Dinagat Island at 700-840 elevation, and at Mt.

[2] This terrestrial, cauliflorous shrub can grow erect at 1.5 m high.

However, it differed from the latter on distinct secondary veins on the leaves adaxial surface, the inflorescences which are cauline or axillary, and its straight anthers.

[2] The species was named in honor of Theresa Mundita Lim, a wildlife advocate, and a former director of the Biodiversity Management Bureau of the Department of Environment and Natural Resources.