NORTH AMERICAN SPECIES OF LEPTOCHLOA. 



17 



LEPTOCHLOA AQUATICA Seribn. & Men-ill. U. S. D. A. Div. Agrost. Bull. 

 24: 36. 19(>l. "Type specimen collected in shallow water near Cuernavaca, 

 Stare of Morelos. altitude 1700 in.. C. G. Pringle. 6664 August 22, 1897." 

 Resembles L. floribunda, but differs in having more unequal outer glumes. 

 longer spikelets. with more distant flowers and obtuse flowering glumes. In 

 L. floribunda the flowering glumes are distinctly short-awned. (Fig. 12.) 



Fig. 12.— Z. aquatica. 



LEPTOCHLOA FASCICULARIS Gray. Man. Ed. 1. 588. 1848. 



Festuca faseicularis Lam. Tabl. Enc. 1: l v '.». 1891. " Ex. Amer. merid. Comm. 

 D. Richard." (PI. IV. figs. 1. 2: PL V. fig. 1: text fig. 13. I 



Bromus poceformis Spreng. Xach. Bot. Gart. Halle 15. 1801. Dr. Dammer. of 

 the Royal Botanical Museum of Berlin, has kindly sent me a transcript of 

 SprengeTs description. " Bromus poceformis mihi Pyremeen." with refer- 

 ence to a footnote which says "Poa digitata Michaux. Sed est certissime 

 Bromus, utut repugnet habitus: namque arista? manifesto infra apieein gluma? 

 oriuntur. Br. panicula erecta stricta compo>ita. spicatis sex Moris sub secun- 

 dis, fol. longissimis involutis." 



Fig. 13. — L. fastcicula ris. 



Festuca polystachya Michx. Fl. 1: 06. 1803. "In arvis Illinoensibus." Type 

 seen. 



Diplachne faseieularis Beany. Agrost. SO and 160. Atlas, p. ll.pl. xvi. rig. 9. 

 1812. Made type of new genus without description of species. 



Festuca procumbens Muhl. Gram. 16m. 1817. A prostrate form with longer 

 awns, but the characters are not constant, and it does not seem best t 

 rate this as a species, as is done by Mr. Xash. 



Diplachne procumbens Xash in Britton Man. 128. 1901. Transfers Festuca pro- 

 cumbens Muhl. There is a South American species by this name. Diplachne 

 procumbens Arech. Gram. Urug. 354. 1894. 



11068— No. 33—03 '2 



