A study species list with information on origin (N = native, E = exotic), mean seed mass (g), general life history characteristics (F = forb, G = grass, A = annual, B = biennial), and whether seeds have elaiosomes (fatty bodies attached to the seed that have evolved for ant seed dispersal).

aPemberton and Irving (1990) concluded that C. solstitialis seeds lack elaiosomes, but the pappus-bearing seeds of this plant have structures similar to those described as very poorly developed elaiosomes in other species in this genus.