Seymeria pectinata, commonly called combleaf blacksenna, comb seymeria, or piedmont blacksenna, is a species of annual herb endemic to several states of the U.S. southeast coastal plain. It was also historically found in Louisiana. It, like most other members of Orobanchaceae is a hemiparasite, specifically of pines.
S. pectinata can grow up to 75 centimeters (approximately 2.6 feet) in height. The leaves are oppositely arranged, and are greater than 1 centimeter in length. When inflorescence occurs flowers are yellow in color.
It occurs in sandy, fire-dependent pine habitats of the southeast including flatwoods, longleaf pine sandhill, pine barrens, and scrubby flatwoods.