Flower, Weed
tall tickseed
AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.
Oblong
Margin: white
Center: black
Shiny with fine longitudinal lines
Narrow marginal wings
PappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
crown and basalBasal:
The base of the fruit or seed opposite the apical end.
attachment are similar.
Not listed
Included
Asteraceae
Coreopsis tripteris L.
Coreopsis tripteris L. var. deamii Standl.
Coreopsis tripteris L. var. intercedens Standl.
Coreopsis tripteris L. var. smithii Sherff
Coreopsis tripteris L. var. subrhomboidea Sherff
