Botanist Works to Save Hawaii's Rare Plants

native   n., born or grown in a particular place

invaded   v., entered an area by force.  In this story, plants not known in Hawaii began growing in the state and killed off some native Hawaiian plants

botanist   n., an expert in the science of plants

disappear   v., to become unseen, to no longer exist

extinction   n., the state or situation that results when something (such as a plant or animal species) has died out completely