GRAMINE^. 665 



DANTHONIA, DC. 



D. COmpressa, Austin. Like Z). spicata, but taller; leaves longer; 

 panicle larger and more open ; teeth of the lower palea longer and more 

 slender. — Summit of Roan Mountain, North Carolina (Chickering), and 

 northward. 



HOLCUS, L. Soft Gkass. 



Spikelets 2-flowered, the flowers short-pedicelled, the lower one perfect 

 and unawned, the upper one triandrous and awned. Glumes 2, thin, keeled, 

 enclosing the flowers. Paleae 2, thin, equal, the lower one keeled. Grain 

 free. 



H. lanatus, L. Soft-downy, erect (2° high); panicle oblong (2' -4' 

 long) ; awns recurved. — Low ground, North Carolina. Introduced. 



BEIMARIA, Fluegge. 



Like Paspalura, but the spikelets glumeless, and the sterile flower of one 

 palea. — Culms creeping, spikelets appressed to the flexuous rachis in two 

 rows. 



R. oligostachya, Munro. Culms branching, leaves linear, attenuate, 

 the sheaths mostly longer than the internodes ; spikes 3-4, filiform, at length 

 reflexed; spikelets sunk in the flexures of the rachis. — Banks of the St. 

 John's, East Florida {Curtiss). 



PASPALUM, L. 



P. monostachyum, Vasey (ined.). "Very smooth throughout; culm 

 strictly erect (3° high), simple ; leaves erect, very narrow, striate-nerved, the 

 lower ones 1°-!^° long, the uppermost one short, pointing the elongated 

 sheath; spike solitary, long-peduncled, nearly straight, 6' -7' long; spike- 

 lets in two rows beneath the filiform rachis, oblong-oval, obtuse (1^" long) ; 

 lower palea slightly keeled ; perfect flower smooth. — South Florida ( Garber). 



P. Beimarioides, n. sp. Culms long, ascending from a creeping base, 

 branching ; leaves narrow-linear, attenuate, the sheaths as long as the inter- 

 nodes; spikes mostly 3, subterminal (2' long) ; spikelets in 2 rows under the 

 straight triangular rachis, ovate-lanceolate, acute, the glume and undulate 

 sterile palea equal, thin, 3-nerved, longer than the acute perfect flower. — 

 Brackish marshes along the coast. West Florida. 



P. obtusifolium, Raddi. Creeping ; flowering branches (1° high) single- 

 jointed; leaves (r-2' long) broadly linear, obtuse ; peduncles 2-4 from the 

 long sheath ; spikes 2-4, filiform ; spikelets in 2 rows, ovate, acute ; sparse, 

 hairy, 3-nerved. (P. barbatum, Schultes.) — Damp waste ground, Georgia 

 and Florida. , 



P. Boscianum, Fluegge. Perennial ; culms simple (2° high) ; leaves 

 long, linear ; spikes several, distant, spreading (2' long) ; spikelets in 3 rows 

 under the narrow flexuous rachis ; upper glume more or less rugose within 

 the pale thickened margins. (P. plicatulum, Michx.) — South Carolina, and 

 westward. 



56* 



