Plants 20–60 cm. Leaves basal and cauline; basal petiolate; blades 3-nerved, linear, 6–18 cm × 2–7 mm. Heads (2–)4–10(–20), 10–25 mm diam. Peduncles 6–12 cm. Phyllaries 5–8 × 1.5–2 mm, (margins often winged proximally) apices obtuse to acute, often mucronulate. Paleae ± linear, apices obtuse, mucronulate to ± subulate. Corollas usually white, sometimes pale lavender, lobes 4–6 × 1 mm. Pappi: scales margins entire or denticulate. 2n = 18.

Flowering May–Jun. Sandstone outcrops, pine savannas, mixed hardwoods and pines; of conservation concern; 100–200 m; Fla., Ga.

Marshallia ramosa is known only from sandstone outcrops in southeastern Georgia and in the Florida panhandle. It is associated with pine savannas in Florida and with mixed hardwoods and pines in Georgia.