NORTH AMERICAN SPECIES OF LEPTOCHLOA. 



17 



LEPTOCHLOA AftUATICA Scribn. & Merrill. U. S. D. A. Div. Agi'ost. Bull. 

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

 State of Morelos, altittide 17(»0 m., C. G. Prinijle. mU August 22. ISJi:." 

 Resembles L. floribunda, but ditfers 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.) 



Pig. 12.— L. nqnatica. 



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



Festuca fascicidaris Lam. Tabl. Enc. 1: 189. 1891. " Ex. Amer. merid. Comm. 

 D. Richard." (PI. IV. figs. 1. 2; PI. V. fig. 1: text fig. 18.) 



BroiiiKs jioa'formis fipreng. Nach. Bot. Gart. Halle 15. 1801. Dr. Dammer. of 

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

 SprengeVs description. '• Bromiis poceforniis mihi Pyrenaeen."' \\'ith refer- 

 ence to a footnote which says ''Poa dkjitaia Michaux. Sed est certissime 

 Bromiis. utut repugnet habitus: nam(iue aristae manifesto infra apicem glumte 

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

 dis, foi. longissimis involutis." 



Fig. V^. — L.faxcicnlaris. 



Festuca polystaclnja Michx. Fl. 1: 66. 1803. '• In arvis Hlinoensibus.- 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 ^\^th 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. 



11068— No. 33—03 ^ 



