plant species found at this elevation include "styphelia tameiameiae", "taraxacum officinale", "tetramolopium humile", "agrostis sandwicensis", "anthoxanthum odoratum", "trisetum glomeratum", "poa annua", "sonchus oleraceus", and "coprosma ernodiodes". one notable species is mauna kea silversword ("argyroxiphium sandwicense" var. "sandwicense"), a highly endangered endemic plant species that thrives in mauna kea's high elevation cinder deserts. at one stage reduced to a population of just 50 plants, mauna kea silversword was thought to be restricted to the alpine zone, but in fact has been driven there by pressure from livestock, and can grow at lower elevations as well.