AM)HOl'0(iUNE.E. 03 



Racemes solitiiry, 1-sidecl at the apex of the culm or its branelies. 

 One to tifteen of the lower pairs of spikelets homoganioiis, the 

 stamiuate or ueuter awnless. The perfect pistillate spikelets sub- 

 cyliudrical, awnetl, iirst glume hard, involute, second awnless, 

 obscurely keeled, third hyaline, fourth narrow at the base, bearing 

 u protruding awn, the twisted [)ortiou of which is clothed with short 

 rufous or white hairs; palea or minute. Grain linear-oblong or 

 oblong, obcompi'essed; embryo e.\. iidiug beyond the middle. 

 Petlieellate spikelets awnless, staniinite or neuter, culms com- 

 pressed. Leaf-blades usually narrow. 



These grasses are wiilely distiubuted over warm regions of Eu- 

 rope, Asia, Africa, Australia, and North America. 



;31. A. melanocarpus Ell. Uot. S. C. and CJa. 1 : 14G (181 0). 

 t^fijxi mehmocavpa Muhl. Gram. ISo (LSI?). ViimbuptHjon inelano- 

 cai'iuis Spreng. Syst. 1 : '2S!i (IS"^4). Tvarhijpmpa si-nihiciihtlus 

 Nees, Agrost. Uraz. ;347 (lS"i!)). Uvtvvojuujon aniiiiiiiatns Trin. 

 Mem. Acad. St. I'etei'sl). (VI.) 'l : "^54 (is;}:j). Andropo(/ou .■<n'o- 

 Mcithifiis Kunth, Eiium. 1 : 507 {18:V.)). 



Annual; culms 0.,5-'2 m. high, very smooth, much branched 

 above, the spikes nearly covered by the sheaths. Slu-aths subcom- 

 pressed, very smooth, loose, the highest with no bhub' or a very 

 short one : ligule 1-4 mm. long, smooth at the apex, round ; the 

 lower blades ilat, lo-40cm. lo)ig, 0.5-1 cm. wide, the base rather nar- 

 rower, the apex long-pointed, margins scabrous. Racemes within 

 the spathes borne on short pi'dicels, erect, slightly compressed, 

 4-() cm. long, besides the awns. Pistillate or perfect spikelets 7-9 

 mm. long, on a callus 3 mm. long, clothed with appressed, rusty, 

 brown hairs, first glume obscurely 0-nerved, nmi. long, fourth 

 glume bearing a bent awn. S-l"2 cm. long, sliortly and sol'tly ))nbcs- 

 cent with brown hairs ; palea 0. Ovary o])long, with two points, 

 the staminate or neuter spikelets pedicellate, slightly sigmoid, lan- 

 ceolate-acuminate. l<i-'20 mm. long; first glunu> herl)aceous. smooth 

 except the infolded nuirgins, 17-'21 -nerved, second a third or fourth 

 shorter, lanceolate, )5-nerved. very acute, tliird 1-nerved, 8 mm. 

 long, fourth very short, hynliiu' : palea 0. Anthers 4 mm. long, 

 sometimes 0. Widely dis[)ersed. Florida, C/ir/if<s IJ041, A. P. 



