Cerastium is a genus of annual, winter annual, or perennial plants belonging to the family Caryophyllaceae. They are commonly called mouse-ear chickweed. Species are found nearly worldwide but the greatest concentration is in the northern temperate regions. There are about 200 species. A number are common weeds in fields and on disturbed ground.
The greatest concentration of this plant species is concentrated mostly in southern temperature regions.
The prompt states that the largest concentration of the species is in northern temperature regions.