Melica hyalina is a species of grass found in Brazil and southern South America.

[1] The species is perennial with elongated rhizomes and erect culms which are 50–100 centimetres (20–39 in) long.

The leaf-sheaths are tubular and are closed on one end, with its surface being glabrous or pilose.

The panicle is open, linear, is 6–25 centimetres (2.4–9.8 in) long and carry some spikelets.

The main panicle branches are appressed with dominant and scabrous axis.