线叶粟米草（学名：Mollugo cerviana）为番杏科粟米草属下的一个种。

Mollugo cerviana is a species of flowering plant known by the common name threadstem carpetweed. It can be found on most continents growing as a weed in many types of dry, sandy habitat types. It is an annual herb producing a thin, erect stem up to about 20 centimeters tall. The narrow, waxy leaves are up to 1.5 centimeters long, linear in shape, and arranged in whorls around the stem. The inflorescence is a loose umbel of tiny flowers each made up of whitish, petal-like sepals less than 2 millimeters long, and no true petals.