Seashore dropseed is a low-growing vigorous perennial grass that spreads by rhizomes, and is commonly found on coastal dunes, high marshes, and transition areas. The height ranges from 4 to 8 in. tall, and forms dense patchy mats. Root balls forms approximately 2 in. below soil surface. Leaves are 1-4 in. long and 0.04-0.12 in. wide and rolled inwards. Salt crystals common on leaves and stems. The leaf sheath is overlapping and hairy at the throat. Its inflorescence is dense, spike-like, and grayish, flowering from May to October. The panicle, 3” long, is shorter than other Sporobolus species.