The Coreopsis Spurium is an uncommon, giant plant and can be found only at river borders. It blooms once a year, for 1 week. It has large, oval leaves, which are usually blue-green. It also grows quite small flowers, which can be dark purple, light purple, dark orange and dark silver. These plants grow in huge numbers, but it's no trouble to control and maintain their growth. They can be used as medicine. As a defense mechanism the Coreopsis Spurium grows tiny thorns. They rely on self pollination to reproduce. Once pollinated, they grow fairly large, delicious nuts.