ⓘ Aristida portoricensis

                                     

ⓘ Aristida portoricensis

Aristida portoricensis is a rare species of grass known by the common name pelos del diablo. It is endemic to Puerto Rico, where it is known from two locations, one in a residential area of Mayaguez and one in the Sierra Bermeja. Two other known sites have been extirpated by development of the habitat. It is a federally listed endangered species of the United States.

It is a perennial grass that produces a beam of stems 30 to 50 centimeters tall. The inflorescence is a narrow panicle a few centimeters in length. Its habitat includes subtropical wet forests and pastures on soils of clay and serpentine origin. The development of the Sierra Bermeja is a potential threat for grass and many other endemic plants. Vandalism of the few remaining plants is also a potential threat.