GRASSES OF IOWA. 



159 



3. SPOROBOLUS NEGLECTUS. 



Sporobolus neglectus Nash. Bull. Torr. Bot. Club. 22: 464. 1895. 

 Nash in Britton and Brown. III. PI. 1: 152. f. 345. 1896. 



Sporobolus vaginaeflorus Vasey in Watson and Coulter. Gray. Man 

 Bot.645. 1890. (6th ed.). Vasey contr. U.S.Nat Herb. 3: 60. 



Sporobolus vaginaeflorus. (Torr.) Vasey . Beal. Grasses N. A. 2: 293. 

 1896. Wood's Class Book 1861. 775 in part. 



DESCRIPTION'. 



Small Rush Grass. Culms 6 to 12 inches 

 (12-24 cm.) high, erect, from a usually decum- 

 bent base, slender, often much-branched, smooth 

 and glabrous. Sheaths about half as long as the 

 internodes, inflated ; ligule very short ; Leaves 1 

 line (2 mm.) wide or less at the base, smooth 

 and glabrous beneath, scabrous and hairy near 

 the base above, attenuate into a slender point, 

 the lower elongated, the upper 1 to 3 inches (2- 

 6 cm.) long, setaceous; terminal panicle 1 to l\ 

 inches (2-5 cm.) in length, usually more or less 

 included in the upper sheath, strict; lateral 

 panicles enclosed in the sheaths ; spikelets about 

 i. 1 , lines (3 mm.) long, the outer scales acute, 

 the lower one slightly shorter; third scale acute, 

 glabrous, a little longer than the second, and 

 about equalling the acute palet. August-Sep- 

 tember. 



DISTRIBUTION. 



Iowa. 3284 Steamboat Rock, Ames, Sioux 

 City, 1354 Jewell Junction, Hawarden, Boone, 

 127 Carroll, Carnarvon, 289 Sioux City, 226 

 Clinton, 172 Ames, Des Moines, Boone (Pam- 

 mel) ; Ames (Hitchcock, Bessey, Sirrine, Stew- 

 Sporoboius art) ; Alt. Pleasant (Mills); 750 Dallas Cen- 



FlG. 



113. 



ter (Rhinchart) ; 1420, Sheldahl (Pammel, 



neglectus— a,, spikelet; b, 

 empty glumes; c, flowering 



glume and paiea. (Charlotte Hume and Sample) ; Sioux City (Miss Wake- 

 field) ; Woodbine (Burgess); Fayette (Fink); 

 Blue Grass (Barnes) ; 300, Muscatine (Barnes and Miller) ; 762, Arm- 

 strong (Pammel and Cratty) ; 631, Parkersburg (Stout) ; 749, Dallas 

 Center (Rhinehart) ; 994, Mt. Pleasant (Witte) ; 997, Glenwood 

 (Jackson) ; 1078, Emmet County (Cratty) ; 1055, Armstrong 



