602 CLX1. GRAMINEJE. PASPALUM 



1. A. PRATENSIS. Fox-tail Grass. 



St. erect, smooth, leafy, about 2f high, bearing an erect, dense, many- 

 flowered, cylindric, obtuse, compound spike, about 2' long ; Ivs. flat, smooth, 

 with swelling sheaths and ovate stipules ; glumes ciliate, connate below the 

 middle, as long as the paleae ; awn twisted, scabrous, twice the length of the 

 flower. 1\. Fields and pastures, Northern States. An excellent grass. Jn., Jl. 



2. A. GENICULATUS. Bent Fox-tail Grass. 



St. ascending, geniculate, rooting below, sparingly branched, l-r2f high; 

 spike cylindrical, about 2' long ; Ivs. linear-lanceolate, smooth, flat, acute, a few 

 inches in length, with slightly inflated sheaths, and long, entire stipules ; glumes 

 slightly connate at base, hairy outside ; palea truncate, smooth, half as long as 

 the geniculate awn. 7]_ Wet meadows, N. Eng. ! Mid. States and Brit. Am. Jn. 

 /?. aristulafrus. Torr. (A. aristulatus. MX.} Awns very short. 



15. CRYPSIS. Ait. 

 Gr. icpvirais, concealment; from the flowers being concealed in the sheaths. 



Inflorescence an oblong spike ; glumes 2, unequal, compressed, 1- 

 flowered ; paleae 2, unequal, longer than the glumes ; sta. 2 3 ; ca- 

 ryopsis loose, covered by the paleae. 



C. VlRGINlCA. Nutt. 



St. procumbent and geniculate, 612' long, much branched from the base ; 

 Ivs. finally involute, divaricate, short, rigid and pungent, subpilose above; spikes 

 oblong-cylindrical, thick and lobed, more or less enclosed in the inflated sheaths 

 of the leaves, the terminal one about 1' long, lateral shorter and subcapitate; 

 glumes roughened on the keel, the upper a little longer. About Philadelphia, 

 Barton. Sept., Oct. 



16. PHLEUM. 



Gr. <f>\os ; used by the ancients probably for a different plant. 



Grlumes 2, equal, carinate, much longer than the paleae, rostrate or 

 mucronate ; paleae 2, included in the glumes, truncate, awnless. 



1. P. PRATENSE. . Timothy or Herd's Grass. 



St. erect, simple, terete, smooth, 2 4f high ; Ivs. linear-lanceolate, flat, 

 glaucous, roughish ; sheaths striate, smooth ; stip. obtuse, lacerated ; glumes ap- 

 parently bicuspidate, in a dense, long, cylindric, green spike ; anth. purple ; 

 stig. white. This is probably the most valuable of all grasses. It is extensively 

 cultivated, N. Eng., Mid. and ~W. States, and is probably native. 



2. P. ALPINUM. Mountain Herd's Grass. 



St. about If high, simple, erect ; Ivs. shorter than the sheaths, broad and 

 clasping at base, acute at apex, smooth ; sheaths inflated ; spicate panicle oblong- 

 ovate, very short (4 5" long) ; glumes truncate, mucronate, with a fringed keel; 

 awns as long as the glumes. 1\. Alpine regions of the White Mts., N. H. 

 Also native of Arc. Am. 



TRIBE 4. PAJOCEJE. Inflorescence spiked or panicled. Spikelets 1 or 

 (more usually) 2-flowered, one of the flowers being sterile or imperfect. 

 Glumes usually (membranaceous) of a thinner texture than the paleae, which 

 are more or less cartilaginous, the lower palea half enfolding the upper, 

 sometimes awned. 



17. PASPALUM. 



Gr. TTflunraAoj, millet; from the resemblance of the seeds. 



Flowers in unilateral spikes ; glumes 2, membranaceous, equal, 

 suborbicular, closely. pressed to the 2 paleae ; stigmas plumose, colored ; 

 caryopsis coated with the smooth, plano-convex paleae. 



1. P. SETACEUM. Michx. (P. cilialifolium. Torr., <f*c., not of Michx.) 

 St. erect, very slender, 1 2f high, simple or branched from the base, with 



