GRASSES OF IOWA. 



79 



DISTRIBUTION. 



Iowa. Mr. Pleasant, 1507 (Mills); Emmet County, 1068 

 (Cratty) ; Story City, 2087 (Miss Rantschler and Sample) ; Ames 

 (Beardslee, Bessey) ; Dubuque (Pammel) ; Greenfield (Stewart); 

 Ames, 16 (Ball and Sample) ; Story City, 1915 (Pammel and Beyer); 

 Story Count\- (Hitchcock); Story City, 965 (Pammel); Johnson 

 Count)' (Shimek). 



North America. From Minnesota to Iowa, the Dakotas, Nebraska 

 and Missouri. 



21. PAN1CUM SCRIBNERIANUM. 



Panicum Scribnerianum 

 Nash. Bull. Torr. Bot.Club. 

 22: 421. 1895. Nash in Britton 

 and Brown 111 PI. 1: 118. /. 

 259. 1896. Scribner. Bull. U. 

 S. Dept. Agrl. Div. Agros.17: 

 97. f. 393. 1899. 



Panicum sco pari u m 

 Sereno Watson. In part, Gray 

 Man. 632. 18P0. (6 ed.) 



Panicum pauciflorum. 

 Gray Man. 613. 1848. 



description. 



Scribner's Panicum. 

 An erect and finally branch- 

 ing perennial 1 to 3 

 feet (i-i-b dm.) high, 

 with usually papillate-pilose 

 sheaths, more or less spread- 

 ing, flat leaves which are 

 smooth and scabrous be- 

 neath, and small ovoid 

 panicles I to l\ inches (2-3 

 cm.) long. Spikelets obo- 

 void 1 2 lines (3 mm.) 

 long, nearly glabrous. In 

 dry or moist soils. May 

 to September. 



Panicum Scribnerianum 

 is common on prairies in 

 all parts of the state. The 

 close ally P. Leibergii oc- 

 curs on lower ground. 



Fig. 57 



Panicum Scribnerianum. — a, b, c, Spikelets. 

 (Div. Agros. U. S. Dept. Agrl.) 



DISTRIBUTION. 



Iowa. New Hampton, 2295 (Rolfs); Charles City (Arthur); 

 Muscatine (Reppert) ; Iowa City (Hitchcock); Greene (Miss Price); 

 Des Moines (Carver) ; Mt. Pleasant, 1914 (Mills) ; Cedar Rapids 

 (Shimek) ; Tama County (Sirrine) ; Maquoketa (Goodenow) ; Green- 



