About Chrysopogon aciculatus (Retz.) Trin.
Chrysopogon aciculatus, also known by the synonym Andropogon aciculatus, is a species of grass. It is native to low elevation tropical regions of Asia, Polynesia, and Australia. Its common names include amorseco (from Spanish meaning "dry love", which should not be confused with the amor seco tree Alchornea glandulosa), lesser spear grass, Mackie's pest, pilipiliula, and grama-amorosa (Brazilian Portuguese). This grass is widely classified as an invasive species, though it is used for medicinal purposes in some cultures. Its flowering stems grow to around 20 to 60 centimeters in height. Its leaves are linear-lanceolate, measuring roughly 3 to 10 centimeters long and 4 to 6 millimeters wide. The purplish panicles are open, have few whorled branches, and can grow up to 5 centimeters long, bearing few-flowered spikes. The sessile spikelet is very narrow, approximately 3 millimeters long. It has an elongated, barbed callus, and a linear, acuminate, awned fourth glume.
