Eryngium yuccifolium. Perennial, native to Texas and coastal areas of Florida and all the way north to New Jersey, Indiana, Minnesota, and Nebraska. There are several other eryngiums also called Rattlesnake Master but E. aquaticum is not native to Texas.
It is in the parsley family (Apiaceae) although you would not think so given the stiff upright stem with yucca like leaves with soft hairlike bristles. Crush the leaves and you will smell the distinct fragrance of parsley and carrots leaves. In spring flower heads appear on the stiff stem consisting of globe like greenish-white flowers. It is a magnet for butterflies, bees, and wasps.
For years I have been trying to grow Sea Holly which is Eryngium planum since it is supposed to like hot areas, but it did not like the humidity. Much to my delight, Rattlesnake Master loves it here. It will reseed but is not very aggressive in my garden. It takes its time to get established due to a large root system. Once established it reliably produces those tall stems, some up to 4 feet, with multi stemmed flower heads.
I find it shows better in groupings of three to five plants with other wildflowers such as Gaillardias.
According to folklore, Rattlesnake Master gets its name from the use by Native Americans to treat snakebites.