[2][3][4] [5] Over time, with revised concepts of morphological interpretation in the bamboos and the accumulation of strong molecular evidence[6] it became clear that the two species formerly known as A. arenicola, and A. cannavieira are actually unrelated to A. simplex and are correctly placed in their own genus Filgueirasia.

[1] The genus was named after Dr. Tarciso Filgueiras who has researched grasses of Brazil, especially those of the Cerrado region.

There is a photograph of him in a patch of F. arenicola on the cover of the journal in which the genus was published - cited above and linked below.

They serve as forage for cattle and wildlife, especially in the dry season when the above ground parts of many other grasses are dead.

[7] Although both species are highly adapted to the cerrado biome, they have separate ranges and different habitat requirements including soils and climate.