Exallosperma longiflora is a species of flowering plant belonging to the family Rubiaceae.

It grows in lowland dry deciduous and semi-deciduous forest on limestone, from sea level to 450 meters elevation.

[3] The genus is distinguished within tribe Pavetteae by pollen with psilate tectum, and by fruit with two stony pyrenes.

Each pyrene contains a laterally flattened ovoid seed with irregularly distributed surface ridges.

The ridges are formed by elongation of the outer layer (exotesta) cells.