Vernonia greggii subsp. ervendbergii (A.Gray) G.C.Chapm. & S.B.Jones, 1978 6% complete

No common name

Chapman GC, Jones SB (1978) BIOSYSTEMATICS OF THE TEXANAE VERNONIAS (VERNONIEAE: COMPOSITAE). Sida, Contributions To Botany 7(3): 264-281. Retrieved from http://www.jstor.org/stable/41967385