This hexaploid (2n = 102) is close to strumosus (see above). It occurs mostly in remnants of thin grassy woodland and transitions to associated "barrens" on the Interior Low Plateaus in Ala., Tenn. and Ky. (FNA 21). A few colls. from the Cumberland Plateau in Ky. and Tenn. (Schmalzer et al. 1985; EKY, MO, TENN) and elsewhere could be tentatively assigned to eggertii, extending its previously known range, but distinction from narrow-leaved forms of strumosus is often difficult and may be impossible in some cases. H. eggertii is a variable taxon that still deserves more precise circumscription and a thorough search for herbarium material. There are also eggertii-like plants, or putative strumosus-eggertii transitions, collected from Ark., Ill., Miss., Ga. and S.C. (e.g. at GH, MO, NCU and Univ. of South Carolina).