_Root_ perennial. _Culm_ two to four feet high, _generally_ ramose, solid, and terete, except that between the joints where the branches originate, it is grooved on the inner side, and often ciliate on its angles near the joints. The branches originate towards the extremity, commonly from two to three in number, each supporting a single terminal spike. _Leaves_ very narrow, acute, comparatively short, those beneath much the longest, rigid, somewhat involute, and sharply serrulate towards the apex. _Sheaths_ rather shorter than the _internodes_, open to the base, but closely embracing the culm. _Spikes_ 3 to 5 inches long, the peduncles clothed with a very delicate acute pointed sheath, which embraces it so closely as almost to elude observation, varying much in length, but seldom extending to the base of the spike. Peduncles scabrous near the spike. _Flowers_ alternate, the _male_ or neutral florets situated on one side of the rachis. _Rachis_ compressed, slender, flexuous, hairy on its exterior surface. Pedicel of the neutral florets also compressed, and hairy on its exterior surface. _Valves_ of the calyx _nearly_ equal, lanceolate, acute, coriaceous, polished, the inner margin of each inflected. The exterior margin of the outer valve finely _ciliate_ towards the apex. _Valves_ of the corolla lanceolate, acute, membraneous, nearly the length of the calyx. The male or neutral, are rather smaller than the hermaphrodite flowers. _Stamens_ 3, very short. _Anthers_ twin, purple. Styles 2, excerted, plumose, dark brown. Discovered in flat pine barren on the north side of Satilla river, in Georgia, on the 21st of October, 1815. GENERAL OBSERVATIONS. These plants are unquestionably allied to _andropogon_ in their mode of flowering, but have nevertheless sufficient _essential characters_ to distinguish them. In _habit_, they appear but slightly similar. They differ _principally_ from their congeners in the pedicellate character of their neutral florets. _The spikes are not axillary in either of them._ The branches are _axillary_, of which several sometimes originate from the same axil in the _R. corrugata_. Each spike, when fully evolved, is not only _pedicellate_, but the _pedicel_, or peduncle, is connected with a _culm_ containing one, two, or more joints.[53] The culm is not compressed, nor the leaves long in the _R. ciliata_, as stated by _Mr. Nuttall_, who appears to have confounded the two species in these, and some other instances. The joints of the rachis in both are _fragile_, the joints of the culm in neither.