140 THE AMERICAN MIDLAND NATURALIST. 
Panicum leibergit (Vasey) Scribn. 
Prairie. Common. June 20. 
Echinochloa crusgalli (1,.) Beaur. BARNYARD GRASS. 
Fie ds and various low places. Common. July 20. 
Chaetochloa glauca (I.) Scribn. YELLOW PIGEONGRASS. 
Fields and roadsides. Common. fuly 15. 
Chaetochloa viridis (1,.) Seribn. GREEN PIGEONGRASS. 
Fields and roadsides. Common. June 25. 
Chaetochloa ttalica (1,.) Seribn. ITALIAN. MILLET. 
Frequently escaped from cultivation. 
Cenchrus carolinianus Walt. SANDBUR. 
Along N. P. Ry. Stevens in 1918. : 
Zizania aquatica I, WILD RICE. INDIAN RICE. 
Edge of river. Abundant in some years (1910, 1918, 1919), 
none or rare in others (1920). Aug. Io. 
Homalocenchrus oryzoides (1,.) Poll. CUT-GRASS. 
Riverbank. Common. Aug. 15. ~ 
Phalaris arundinacea \,. : REED CANARY GRASS. 
Ditches or low prairie. Frequent. June 20. 
Phalaris canariensts \,. : CANARY GRASS. 
L. R. Waldron in 1895. 
Hierochloa adorata (1,.) Wahl. SWEET GRASS. 
Low prairie or roadsides. Common. May 15 (14). 
Stipa viridula Trin. FEATHER GRASS. 
Prairie and roadside. Frequent. June 15 (15). 
Stipa comata ‘Trin. & Rupr. NEEDLE GRASS. 
Along railroad (introduced in gravel?) Occasional. 
Stipa spartea Trin. PORCUPINE GRASS. 
Prairie. Frequent. June 25 (one year only; wiridula on same 
date). 
Oryzopsis asperifolia Michx. MOUNTAIN RICE. 
Aspen woods on Minnesota side. May ro. 
Oryzopsis racemosa (Sm.) Ricker. 
Woods. Occasional. 
Muhlenbergia mexicana (1,.) ‘Trin. 
Woods. Frequent. Aug. 15. 
Muhlenbergia racemosa (Michx) B. S. P. WILD TIMOTHY. 
Woods and roadsides. Common. 
_Muhlenbergia foliosa Trin. 
