PANICE.E. Ill 



Culms spreading, j)i'ostrate. or erect wliere crowded or sliaded. 

 braucliiii<( freely below, 15-30 cm. high. Leaf-blades flat, thin, 

 smooth, 3-G cm. long, 3-4 mm. wide. Spikes 2-0, diverging, 

 nearly digitate, 4-6 cm. long, rachis* flat, thin, 1 mm. wide. 

 Spikelets 3 together, successively overlapping for half their length, 

 ovoid or oblong, 2 mm. long, first glume minute and likely to be 

 overlooked, second and third as long as the spikelet, soft with very 

 short hairs, some having enlarged ti])s, 5-nerved. 



Iowa, Hitchcock; Ontario, Fowler. 



Introduced from Europe. An annual grass, common especially 

 southward. 



Var. Mississippiense Oattinger. 



Plant 30-50 cm. high ; spikes 7-10 cm. long, ra'-hia nearly 

 straight; spikelets mostly in pairs or single. Tennessee, Gattinger, 

 also Minneapolis*, Minn. 



0. P. serotinum (Walt.) Trin. (Jram. Panic. lOG (1833). 

 Sj/iiflierisma serofiiia Walt. Fl. Car. TO (1T88). Jhyitaria serotina 

 Michx. Fl. lior. Am. 1 : 40 (1803). />. rilhsa Ell. Hot. S. C. and 

 (la. 1:132 (1800). PaspaJum serotiiiuni Fluegge, Monog. 140 

 (ISlOj. 



Perennial ; culms branching below, ascending from a creeping 

 base, 10-30 cm. higli. Blades and sheaths rough, hairy, the blades 

 thin, flat, 3-7 cm. long, 5-7 mm. wiile. Spikes 3-5, cxserted or 

 included, spreading, not over 1.5 mm. apart at base, 4-7 cm. long, 

 rachis thin, flat, 1 mm. wide. Sjjikelets mostly in threes on pedi- 

 cels of unequal lengths, oblong, acute, 1.5 mm. long, first glume 

 obsolete, second one-third as long as the spikelet, 3-nerved, clothed 

 with (irooked and knotted hairs, third hairy, about as long as tlio 

 spikelet, 7-ne''ved. 



Florida, Cnrfif^s 3000. 



North Carolina to Florida and westward. 



7. P. lanatum h'ottb. Act. Lit. Univ. Tlafn. 1:269 (1778). P. 

 Uncophmun II. li. K. Nov. Cen. et Sp. 1 : !t7 (1815). 



Culms stout, erect, 00-120 cm. high. Leaf-blades flat, broadly 

 linear, scabrous, often 30 cm. long; ligule ciliate. Panicle erect, 

 contracted, 15-30 cm. long, branches numerous, 5-10 cm. long. 



