180 



GRASSES OF IOWA. 



4. CALAMAGROSTIS INEXPANSA. 



Calamagrostis inexpansa Gray . Gram, et Cyp. 1. No. 20:1834. Scrib- 

 ner. Am. Grasses. Bull. U. S. Dept. Agrl. Div. Agros. 17: 191./ ^7-1900. 



(3ed.) 



Calamagrcstis confinis Nutt. Gen. 1:47. 1818. Watson and Coulttr. 

 Gray. Man. Bot. 650. 1890. (6 ed ) 



Calamagrostis neglecta var. confinis (Willd.) Beal. Grasses, of N. A. 2: 



353. 1896. 



Culamagrostis coiifinis (Willd.) Nutt. Nash in Britton and Brown 111. 



Fl. 1: 165./. 377- 1896. 



Calamagrostis confinis inexpansa Gray . Kearney . Bull. U. S. Dept. 

 Agrl. Div. Agros. 11: 37. 1898. 



DESCRIPTION. 



Bog Reed Grass. A slen- 

 der, erect perennial, \\ to 

 \\ feet (3-9 dm.) high, with 

 narrow, flat leaves and con- 

 tracted panicles 2 J to 9 

 inches (5-18 cm.) long. 

 Spikeiets \\ to 2 lines (3-4 

 mm.) long with nearly 

 equal, acute empty glumes 

 about the length of the 

 flowering glumes, the basal 

 hairs of which nearly equal 

 it in length or are one-third 

 shorter. Damp, sandy soil. 

 August to September. 



This species is not infre- 

 quent in northern Iowa, es- 

 pecially in Dickinson, Hum- 

 boldt, Emmet and Kossuth 

 Counties. Probably extends 

 as far south as Hamilton 

 Count}'. The species grows 

 in low grounds, borders of 

 shallow streams; borders of 

 lakes, and in marshy places. 



Fig. 127. Calamagrostis inexpansa— a, empty 

 glumes; b, flowering glumes with basal hairs c, 

 tuft of hairs at base of flowering glume. (Div. of 

 Agros. U. 8. Dept. of Agrl. ) 



