Andropogon aciculatus) is a species of grass native to the tropics of Asia, Polynesia, and Australia at low elevations.

Common names include amorseco (Spanish, "dry love"; not to be confused with the amor seco tree, Alchornea glandulosa), lesser spear grass, Mackie's pest, pilipiliula, and grama-amorosa (Brazilian Portuguese).

[1] The grass is widely considered an invasive species, but some cultures use it for medicinal purposes.

The panicles are purplish, open and with few whorled branches and can reach about 5 centimeters long, bearing few-flowered spikes.

The callus is elongated and barbed and the fourth glume is linear, acuminate, and awned.