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

Description
The species is perennial with elongated rhizomes and erect culms which are  long. The leaf-sheaths are tubular and are closed on one end, with its surface being glabrous or pilose. The leaf-blades are flat with scaberulous surface and acuminate apex. They are  long by  wide. The membrane is eciliated and is  long. The panicle is open, linear, is  long and carry some spikelets. The main panicle branches are appressed with dominant and scabrous axis.

Spikelets are obovate, solitary,  long and have 2 fertile spikelets that are pediceled. The pedicels are ciliate, curved, filiform, and hairy above. The spikelets have 2 fertile florets which are diminished at the apex while the sterile florets are barren, lanceolate and clumped. Both the upper and lower glumes are keelless and membranous, but every other feature is different; Lower glume is flabellate and is  long with erosed apex. Upper glume is lanceolate and is  long with an obtuse apex.

Its lemma have scabrous surface and obtuse apex while the fertile lemma is chartaceous, elliptic, keelless and is  by . Its palea have ciliolated keels and smooth surface. Flowers are  long, fleshy, oblong and truncate. They also grow together, have 2 lodicules and 3 anthers which are  long. The fruits are ellipsoid and caryopses with additional pericarp. They are also dark brown in colour,  long, and have linear hilum.

References

hyalina
Endemic flora of Brazil
Flora of Southern America