358 ° eg Baldwin on Rottbéllia. 
Culm erect, terete, smooth, ramose: leaves very narrow, 
short: spikes cylindrical upon long terete peduncles, solitary 
and terminal, calyx 2-valved, the margin of the exterior valve 
ciliate: corolla 2-valved. 
_ Root perennial. Culm two to four feet high, generally ra- 
mose, solid, and terete, except that between the joints where 
the branches originate, it is grooved on the inner side, and of- 
ten ciliate on its angles near the joints. The branches origi- 
nate towards the extremity, commonly from two to three in 
number each supporting a single terminal spike. Leaves very 
narrow, acute, sippitniticly short, those beneath much the 
wards 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 haity on its exterior surface. Valves of 
the calyx nearly equal, lanceolate, acute, coriaceous, polished, 
the inner margin of each inflected. The exterior margin 0 
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. Stainens 3, very short. Anthers twin, 
purple. Styles 2, exsert, 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 essen- 
tial characters to distinguish them. In habit, they appear but 
slightly similar. They differ principally from their congeners 
