110 PANICACE.E. 



Culms slender, geniculate, brancliinfi below, 30-50 cm. high. 

 Leaves more or less pubescent throughout: blades flat, 3-6 cm. 

 long, 4-7 mm. wide. Spikes 3-8, approximate, spreading, 4—8 

 cm. long, rachis triangular, flexuose. Spikelets in pairs or threes, 

 ovate-lanceolate, 2.2 mm. long, pedicels 0.5-1.5 mm. long, first 

 glume obsolete, second half as long as the floret, third smooth, 

 5-nerved. 



Florida, G. F. Nash 996, in 1894. 



High pine land along roadsides. 



4. P. SAXGuixALE L. Sp. PI. 57 (1753). Crab-grass. Fin- 

 ger-grass. Digitaria sanguinaUs Scop. Fl. Carn. Ed. 2, 1 : 52 

 (1772). Syntherisma jivcecoxAX-M. Fl. Car. 76 (1788). Paspahim 

 sanguinale Lam. Tabl. Encycl. 1: 176 (1791). 



Culms erect or decumbent, branching below, rooting at the 

 lower nodes, 30-90 cm. high. Leaves often pubescent, blades flat, 

 very variable in length and width. Spikes 4-15, rarely 2-3, erect 

 or spreading, crowded within 2-3 cm. at the end of a long peduncle, 

 3-15 cm. long, the rachis usually flattened on the back, flexuose, 

 1 mm. or less w'ide. Sjoikelets in pairs, 1 subsessile, the other 

 reaching half its length above the lower, the pedicellate spikelet 

 containing more pubescence than the other, oblong, acnte, 2.5-3.5 

 mm. long, first glume minute, second lanceolate, about half as long 

 as the spikelet, pubescent or nearly smooth, 3-5-nerved, third 

 glume pubescent or nearly smooth. 5-7-nerved, fourth glume and 

 palea shorter, smooth. Grain flattened, oblong, 2 mm, long, the 

 embryo less than half its length. 



New Jersey, Scribner 95 ; Massachusetts, Beal for M. A. C. 9; 

 Texas, Jenney for Nat. Mus. 10, Georgeson 22 ; New York, Beal 

 for M. A. C. 11: Oregon, Howell ; Mexico, Palmer 48, 269. 



Introduced from Europe into gardens, fields, and waste places. 

 A very commoi\ annual weed, thriving in warm weather. The 

 roots are very strong, making it difficult to remove the plants. 



5. P. LiXEAREKrock. Fl. Sil. 1 :95 (1787). Digitaria humifusa 

 Pers. Syu. 1 : 85 (1805). Syntherisma glabra Schrad. Fl. Germ. 

 1 : 163 (1806). Paspahim ambiguum D. C. Fl. Gall. 123 (1806). 

 Panicwn glabrum Gaud. Agrost. 1:22 (1811). 



