Chaptalia texana TEX Specimen with Heads at 2 Stages
by Bob Harms  email-here

Medina Co.: 3 air km ENE of Mico 29 32 0 N 98 54 0 W 1180-1220 ft. elev., 19 Mar 1983
C. S. Lieb & V. J. Roessling, Jr. 306 (TEX)

Two pressed heads in this specimen illustrate early and late stages of development, the later stage showing how the elongation of the achene beaks (between the phyllaries at the bottom of the images) has pushed the flowers above the phyllaries. [Click image to enlarge.]
early late