GRASSES OF IOWA. 



161 



Wakefield); Ames (Sirrine, Bessey, Hitchcock); Rock Rapids, Lyon 

 County (Shimek) ; Plymouth County (Brown). 



North America. From Manitoba south to Minnesota (Minne- 

 haha Falls, Sandberg), Dakotas (Clements), Iowa, Missouri, Kansas 

 and Nebraska (Paddock). 



5. SPOROBOLUS CRYPTANDRUS. 



Sporobolus cryptandrus Gray. Man. 576. 1848. Watson and Coulter in 

 Gray. Man. Bot. 646. Vasey. Contr. U. S. Nat. Herb. 3: 62. 



Sporobolus cryptandrus (Torr.) 

 Gray. Nash in Britton and Brown. 

 111. Fl. 1: 155. /. 353. 1896. Beal. 

 Grasses. N. A. 2: 304. Scrib- 

 ner. Bull. U. S. Dept. Agrl. Div. 

 Agros. 17: 160. /. 456. 



Agrostis cryptandra Torr . Ann. 

 Lye. 1: 151 1824. 



Vilfa cryptandra Torr. Steud. 

 Syn. PL Glum.l: 156. 1855. Trin. 

 Mem. Acad. St. Petersb. VI. 5: 

 69. 1840. 



DESCRIPTION. 



Sand Rush Grass. An 

 erect, glabrous, caespitose peren- 

 nial, 4 to 7 dm. high, with flat 

 leaves 6 to 12 cm. long, and open 

 panicles 12 to 20 cm. long. Spike- 

 lets 2 to 3 mm. long. Rachilla ar- 

 ticulated above the empty glumes, 

 not produced beyond the flower. 

 Glumes 3, round on the back or 

 slightly keeled, awnless, ob- ( 

 scurely nerved or nerveless; 2 

 outer ones unequal ; floral glume 

 equalling the empty ones. Palea 

 as long or longer than the 

 flowering glume. Pericarp thin. 

 Annual or perennial grasses 

 .empty with small spikelets; various in 



glumes; b, flowering glume. (Div. Agros. U. 8. UnkiV 

 Dept. of Agrl. ) naDlt. 



Ioiva. 1922 New Albin, Turin, Sioux City, Council Bluffs (Pam- 

 mel) ; Armstrong (Cratty) ; Hamburg, Iowa City, Moscow, Fremont 

 County (Hitchcock); Ames (Burgess); Moscow (Reppert) ; Sioux 

 City, Lake Okoboji (Miss Wakefield) ; Cliffland (Shimek). 

 11 



