Wikipedia
Alloteropsis
Alloteropsis (from the Greek allotrios ("strange") and opsis ("appearance")) is a genus of Old World plants in the grass family.
The group is widely distributed in tropical and subtropical parts of Africa, Asia and Australia, as well as on certain islands in the Indian and Pacific Oceans. The genus is unusual among plants in that it includes species with both C and C photosynthetic pathways, and ongoing research is investigating these taxa as a case study in how carbon concentrating mechanisms for photosynthesis evolve in land plants.