GRASSES OF IOWA. 197 



2. BECKMANNIA. 



Beckmantlia Host Gram. Austr. 3: 5. pi. 6. 1805. Bentham & Hooker. 

 Gen. PI. 3: 1099 Hackel in Engler & Prantl. Nat. Pflanz. Fam. II. 2: 60. 

 Endlicher Gen. PI. 80. Scribner. Bull. U. S. Dept. Agrl. Div. Agros. 20. 

 107./. Si. (Rev. ed.) 



Bruchmannia Nutt. Gen. 1:48. 1818. 



Joachimea Ten. ex. Kunth. Enum. 1. 1833. 



Spikelets jointed upon the pedicels, I to 2-flowered (only one fer- 

 tile), obovate and laterally compressed, imbricated in two rows upon 

 one side of the angled rachis of a spike. Glumes 3 or 4, the 2 lower 

 strongly concave and connate, obtuse or acutish, the 1 or 2 flowering 

 glumes narrower, lanceolate, acute or acuminate, and a little exserted, 

 becoming rather rigid, and with the thin palet enclosing the oblong 

 grain. A stout, erect, subaquatic perennial, with the short spikes erect 

 and simply spicate, or in a strict, narrow panicle. (Named for John 

 Beckman, professor of botany at Goettingen.) 



One species. Southern and eastern Europe, temperate Asia and 

 North America. 



1. BECKMANNIA ERUCAEFORMIS. 



Beckmannia erucaeformis Host. Gram. Austr. 3: 5. 1805. 



Beckmannia erucaeformis Host. var. uniflora. Scribner. Watson and 

 Coulter. Gray. Man. Bot. 628. 1900. pi. 15. (6 ed.) 



Beckmannia erucaeformis imiflorus Scribner. Beal. Grasses ofN. A. 

 2: 428./. 77. 1896. 



Beckmannia erucaeformis (L.) Host. Nash in Britton and Brown. III. 

 Fl. 1: 181. /. ///. 1895. Scribner. Bull. U. S. Dept. Agrl. Div. Agros. 

 7: 214./. 2o8. 1900. (3 ed.) 



Bruchmannia erucaeformis Nutt. Gen. 1: 48. 1818. 



Phalaris erucaeformis L. Sp. PI. 55. 1753. 



