Abstract
During field works in Santa Catarina state, we found a new species of Chascolytrum that presents a bulb-like rhizome. This species is similar to Chascolytrum bulbosum, from Pampa biome, differing by glabrous leaf blades, inflorescences larger and laxer, longer spikelets and paleas glabrous between the keels. We additionally provide field and studio photographs and assess its conservation status according to IUCN criteria.