GRAMINEAE 25 



loug : spikelets l^'-'Xl" long : third scale of the spikelet acutish, as long 

 as the palet, and somewhat exceeding the second. — Common in dry 

 grounds throughout. July-October. 



2. S. vaginaeflorus (Torr. ) Wood. Tufted, slender, 6'-12' high: 

 leaves 2'-\' long, broad at base and attenuate into a long involute point : 

 sheaths somewhat inflated, the upper partially enclosing the few-flowered 

 simple panicle : spikelets 2^^-22^^ long, the three scales nearly equal in 

 length, or the outermost slightly shorter and exceeded by the acutely 

 tipped palet. — In dry soil near Kansas City, Courtney and Levasy. Not 

 common. August-October. 



3. S. neglectus Nash. 6'-l8' high, much branched and spreading : 

 leaves long, involute, with conspicuously inflated sheaths : panicles small 

 and numerous, more or less enclosed in the sheaths : spikelets leas than 

 2''^ long, the acute palet slightly longer than the acute third scale : second 

 scale slightly longer than the first and shorter than the third. — Often 

 common in dry ground and well distributed. August-October. 



4. S. cuspidatus (Torr.) Wood. 18' or less high, branching : leaves 

 long, involute : panicles ^'-V long, exserted : scales long-acuminate or 

 cuspidate. — On dry rocky hills north of Eoanoke, Kansas City and at 

 Swope Park. August-September. 



5. S. heterolepis A. Gray. Culms stout, 3° high : leaves 1° long, in- 

 volute : panicle long exserted, 6'' long and \' wide, its branches short and 

 ascending : spikelets 'iV' long. — Common on the prairie between Lee's 

 Summit and Greenwood ; also near Buckner. August-October. 



6. S. argiitus (Nees) Kunth. 1° high : leaves broad and rather 

 short : sheaths hairy at the throat : panicle 2'- 3' long with ascending 

 verticillate branches : spikelets very small, \" long, the first scale one- 

 quarter the length of the second and third, which are equal. ^ — One clump 

 found as a waif near Westminster (Kansas City) along the Belt Line. 

 July-August. 



7. S. cryptandrus (Torr.) A Gray. Culms 2° high, densely tufted: 

 leaves linear, 6' long : sheaths very hairy at the mouth : panicle long, 

 narrow and slender, usually more or less included : branches ascending, 

 scattered or subverticillate : spikelets V loug, about as in the last. — 

 Sandy bottoms along the Missouri River. Not uncommon. July-Sep- 

 tember. 



8. S. airoides Torr. 2^° high : leaves flat, attenuate to a long invo- 

 lute point, sparingly hairy at base : panicle 9' long, very compound with 

 widely spreading branches : spikelets \" long, the second and third 

 glumes equal and twice the length of the first. — Sparingly introduced in 

 the railroad yards at Sheflield. June. 



9. S. asperifolius Nees & Meyen. Culms about 6' high from a decum- 

 bent base ; panicle 2^-4' long, partly included, ascending, the branches 

 scabrous: spikelets on long capillary pedicels many times their length : 



