6 



Aristida havardii Vasey, Bui. Torr. Bot. Clnb, 13 27. 1886. 



Cochise, Xo. 1885. 



Aristida schiediana Trin. & Rupr. Agrost. 3 : 120. 1842. 



Drag! lull ^[ountaiiii^. No. 1866. 



Muhlenbergia gracillima Torr. Pac. R. R. Rept. 4^ : 155. 1857. 



Rincon Mountains, No. 1805; Mescal, No. 1811; Dragoon Mountains, No. 1857. 



Mulilenbergia porteri Scribn. in Beal, Grasses N. A. 2 : 259. 1896. (J/, iexana 



Thurb. in Coult. :Man. Bot. Rocky Mt. Reg. 410. 1885. Not Buckley. 1862.) 

 Vales, No. 1872; Tucson, No. 1602. A form with unusually large panicles. 

 Muhlenbergia vaseyana Scribn. Rept. Mo. Bot. Gard. 10 : 52. 1899. {M. dis- 



tichophylla of American authors. Not Kuntli. ) 

 Dragoon Mountains, No. 1876; near Pearce, No. 1857 (small form). 

 Lycurus phleoides H. B. K. Nov. Gen. et Sp. PL 1 : 142. 1815. 

 Pearce, No. 1959; Dragoon Mountains, No. 1838. 

 Sporobolus airoides Torr. Pac. R. R. Rept. T : 21. 1856. 

 Sulphur Spring Valley, No. 1638 R. H. Forbes, October, 1900; Benson, No. 2005; 



Tucson, No. 1502; Wilcox, No. 1904, abundant about an alkali lake bottom, a 



valuable grass, called "fine saccaton." 

 Sporobolus argutus (Nees) Kunth, Enum. 1:215. 1833. {Yilfa arguta Nees 



Agrost. Bras. 395. 1829.) 

 Benson, No. 1490; AVilcox, sandy ground, No. 1896. 

 Sporobolus auriculatus Vasey, Contr. U. S. Nat. Herb. 3 : 64. 1892. {S. asperi- 



folius brerlfoUus Vasey, ibid. 1 : 56. 1890. Not S. hrevlfoUus Nees. ) 

 Dragoon Mountains, No. 1864. A peculiar form with nearly all the spikelets 



2-flowered. 

 Sporobolus confusus (Fourn.) Vasey, Bui. Torr. Bot. Club, 15 : 293. 1888. ( Vilfa 



coiifusa Fourn. Mex. PI. 2 : 101. 1881. ) 

 Dragoon Mountains, No. 1846. 

 Sporobolus cryptandrus (Torr.) A.Gray, Man. Bot. 576. 1848. {Agrostis cryp- 



tandra Torr. Ann. Lye. N. Y. 1 : 151. 1824. ) 

 Fairbank, No. 1981; Fort Lowell, No. 1581; Sulphur Spring Valley, No. 1636 R. H. 



Forbes, September, 1900. 

 SPOROBOLUS STRICTTJS (Scribn.) n. comb. {Sporobolus cryptandrus stricta 



Scribn. Bui. Torr. Bot. Club, 9 : 103. 1882. ) 

 Benson, No. 2004; University grounds, Tucson, No. 1532; Rincon Mountains, No. 



1796; Wilcox, No. 1893. 

 This form is readily distinguished from Sporobolus cryptandrus A. Gray, by its strict, 



erect, densely flowered, wand-like panicles, the lower portion of which is 



enclosed in the inflated leaf-sheath. 

 Sporobolus wrightii Munro in Scribn. Bui. Torr. Bot. Club, 9 : 103. 1882. 

 Sulphur Spring Valley, No. 1637 R. H. Forbes, October, 1900. 

 Sporobolus utilis Torr. Pac. R. R. Rept. 5^ : 365. 1857. ( Vilfa saccatilla Fourn. 



Mex. PI. 2 : 101. 1881; Sporobolus saccatilla Griseb. 1. c.) 

 Sulphur Spring Valley, R. H. Forbes, No. 1635. 

 Epicampes rigens Benth. Journ. Linn. Soc. 19 : 88. 1881. {Cudm i.Mcroura Thurb. 



1880. Not Kunth. 18.35. ) 

 Dragoon Mountains, No. 1848. Forms large tussocks and is invariably closely 



cropped by stock. 

 Polypogonmonspeliensis (Linn.) Desf. Fl. Atl. 1:67. 1798. {Alopecurusmonspe- 



//V/;.-<;.s^ Linn. Sp. PI. 89. 1753.) 

 Tucson, No. 1619. 



