flower-shaped family crest
caltrop (spiked device scattered to maim infantry and horses); calthrop; caltrap
Red Crystal (politically and religiously neutral emblem used by the International Committee of the Red Cross)
California poppy (Eschscholzia californica); golden poppy
caltrop (Tribulus terrestris); cat's head; devil's thorn; devil's weed; goathead; land caltrop
Trapa incisa (species of plant closely related to the water caltrop)
water caltrop (Trapa natans); water chestnut; caltrop