Galium proliferum, also known as limestone bedstraw, is a species of plant in the Rubiaceae family. It is native to Northeastern Mexico and the Southeastern United States. More specifically, it can be found in American states California (San Diego and San Bernardino County), southern Nevada (Clark County), southern Utah (Kane and Washington County), Arizona, New Mexico, Texas, as well as the Mexican states Coahuila and Nuevo León. Phylogeny It is the sister group to Galium virgatum. It is also closely related to Galium texense and Galium circaezans, as can be seen in the following cladogram: References External links Photo of herbarium specimen at Missouri Botanical Garden, collected 1851 near El Paso, isotype of Galium virgatum var. diffusum and of Galium proliferum Photo of herbarium specimen at Missouri Botanical Garden, collected 1884 in Pima Country, Arizona, isotype of Galium proliferum var. subnudum proliferum Flora of California Flora of Nuevo León Flora of Coahuila Flora of Texas Flora of New Mexico Flora of Arizona Flora of Nevada Flora of Utah Flora of Mexico Flora of the United States Flora without expected TNC conservation status