Eryngium yuccifolium (Rattlesnake Master) matures to a height of 4' and has white "bristly" flowers. These bristly flowers and coarse leaves make it largely ignored by deer and rabbits. It is a member of the carrot/parsley (Apiaceae) family, but is very different-looking from the usual umbel flowers and fine-cut foliage of plants in this family. It is typically found in medium-wet to medium-dry soils and prefers sites with full sun. It will form a tap root in a short amount of time so once planted, it is best left alone. Small native bees, moths and flies will nectar on Rattlesnake Master.
Common name is in reference to a former use of this plant as a treatment for rattlesnake bite.