GENEKA OF GRASSES OF THE UNITED STATES. 



105 



Type species : Rottboellia repcns Forst. 



Lepturus R. Br., Prodr. Fl. Nov. Holl. 207. 1810. One species described L 

 repens, based on Rottboellia repens Forst. 



Monerma Beauv., 

 Ess. Agrost. 116, 

 pi. 20, f. 10. 1812. 

 The species figured 

 is M . monandra, 

 which is Lepturus 

 cylindrica. 



Leptocercus Raf., 

 Amer. Monthly 

 Mag. 4: 190. 1819. 

 In a review of Nuttall's 

 Genera Rafinesque changes 

 the name Lepturus R. Br. to 

 Leptocercus because of a 

 genus of insects by the name 

 of Leptura. 



Our one species, Lep- 

 turus cylindrica (Willd.) 

 Trin. (fig. 53), is intro- 

 duced in salt marshes 

 from San Francisco to 

 San Diego. At matur- 

 ity the spike breaks up 

 into the 1 -seeded joints. 

 The species has no eco- 

 nomic value. For other 

 species that have been 

 referred to Lepturus. see 

 Pholiurus. 



43. PHOLIURUS Trin. 

 (Lepturus of authors, not 

 R. Br.) 



Fie. ^.-Lcvturus cylinartca. Plant, X 1' ^pikelets 1 or 2 HOW- 

 spikelet with a joint of the rachis, x 5 ; spike- erecl ? embedded in the 



let, front view, x 5. articulate rachis and 



falling attached to the joints; glumes two, placed in front of the 

 spikelet and inclosing it, coriaceous, 5-nerved, acute, asymmetric, 



