Purple needle grass (nassela pulchra)  is a type of bunch grass.Purple needle grass looks as its name says it looks like spiny grass like weeds.Purple needle grass has long roots about 20 feet. purple needle grass has seeds that can self bury and it produces about 220 pounds in dense stands.Purple needle grass has no medicinal uses but it is edible in fact the whole plant is edible,the roots, stem, leafs, and the seeds but its poisonous if not cooked.purple needle grass gets its name from its purple spiky fruit that are twisted. for some reason purple needle grass suppresses invasive plants and supports native oaks.