Spermolepis inermis, the Red River scaleseed or spreading scaleseed, is a species of flowering plant in the family Apiaceae. It is native to the central and southeastern United States, and eastern Mexico. An annual reaching , it is found in grasslands. References Apioideae Flora of Nebraska Flora of Kansas Flora of Oklahoma Flora of Minnesota Flora of Iowa Flora of Missouri Flora of Indiana Flora of the South-Central United States Flora of the Southeastern United States Flora of Northeastern Mexico Flora of Veracruz Plants described in 1941