Varronia rupicola, synonym Cordia rupicola,[2] commonly known as the Puerto Rico manjack, is a critically endangered species of flowering shrub in the borage family, Boraginaceae, that is native to the islands of Puerto Rico and Anegada.

[citation needed] Varronia rupicola is a small woody shrub that measures 1.5–5 m (4.9–16.4 ft) in height.

The leaf upper surface is rigidly scabrous, puberulous underneath, and the strigose petioles (the stalk of the leaves) are 2–10 mm (0.079–0.394 in) long.

It produces small white flowers which yield a one-seeded red fruit measuring 4 mm (0.16 in).

El Peñón is a privately owned subtropical dry forest site located in a limestone substrate.