NORTH AMERICAN SPECIES OF LEPTOCHLOA. 



17 



LEPTOCHLOA AQTJATICA Scribn. & Merrill. U. S. D. A. Div. Agrost. Bull. 

 24: 26. 1901. "Type specimen collected in shallow water near Cuernavaca, 

 State of Morelos, altitude 1700 m., 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.) 



FlG. 12.— L. aquatica. 



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



Festuca fascicularis Lam. Tabl. Enc. 1: 189. 1891. '• Ex. Amer. merid. Comm. 

 D. Richard." (PI. IV, figs. 1, 2; PI. V, fig. 1; text fig. 13.) 



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

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

 Sprengel's description. " Bromus poceformis mihi Pyrenseen," with refer- 

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

 Bromus, utut repugnet habitus: namque aristae manifesto infra apicem glumse 

 oriuntur. Br. panicula erecta stricta composita, spicatis sex floris sub secun- 

 dis, fol. longissimis involutis." 



y 



Fig. 13.— L. fascicularis. 



Festuca polystachya Michx. Fl. 1: 66. 1803. '"In arvis Illinoensibus. ' ' Type 

 seen. 



Diplachne fascicidaris Beauv. Agrost. 80 and 160. Atlas, p. 11. pi. xvi, fig. 9. 

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



Festuca procumbens Muhl. Gram. 160. 1817. A prostrate form with longer 

 awns, but the characters are not constant, and it does not seem best to sepa- 

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



Diplachne procumbens Nash 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. 



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