Palo de Nigua

Cornutia obovata is a rare species of tree in the mint family, and formerly considered a member of the verbena family. It is endemic to forested slopes in Puerto Rico, where its common names are capá jigüerilla, nigua, and palo de nigua. When it was added to the endangered species list of the United States in 1988 there were only seven individuals known to remain in the wild. By 1998 there were eight plants known. This is considered one population divided amongst a few locations in the mountain forests of the island.

This is an evergreen tree which can reach 10 metres (33 ft) in maximum height and 15 centimetres (5.9 in) in trunk diameter. The oppositely arranged leaves are oval in shape and hairy on the undersides. It bears clusters of tubular purple flowers.