6 



LIST OF SPECIES. 



Euchleena mexicana Schrad. Ind. Sein. Ilort. (roett. (1832) ; Linnsea, 8: 25 (1833). 

 Sierra INIadre ^lountaiiis, altitude 1,600 ni., State of Durango, 3513 J. N. Rose, 

 Augui^t 15, 1897; State of Durango, 743 E. Palmer, September, 1896. 

 A plant A-ery much resembling corn, found along water ditches at Navocyana Ranch, 



very valuable for forage, passing under the common name of "Maizillo." 

 Tripsacum fasciculatum Trin. in Steud. Nom. ed. 2, 2: 712 (1841). 

 Durango, State of Durango, 537 E. Palmer, August, 1896; on the road near Ilueju- 



quilla, State of Jalisco, 3570 J. N. Rose, August 25, 1897. 

 TRIPSACUM PILOSITM Scribn. & Merrill, sp. nov. (Fig. 1. ) 



A stout, erect perennial about 15 

 dm. h igh , with broad , lance- 

 olate, pubescent leaves. 

 Culms about 1 cm. in di- 

 ameter at the base, smooth 

 below, pilose with rather 

 short white hairs below the 

 panicle; nodes smooth; 

 sheaths longer than the 

 internodes, subcompressed 

 above, scabrous, the lower 

 ones strongly tuberculate- 

 hispid; ligule very short, 

 fruncate; leaf blades 4 to 

 6 dm. long, 2 to 3 cm. wide, 

 acuminate, gradually ta- 

 pering to the narrow base, 

 strongly strigose - pubes- 

 cent on both sides or some- 

 times somewhat pilo.'^e be- 

 neath, very strongly ser- 

 rulate-scabrous on the mar- 

 gins. Inflorescence termi- 

 nal and axillary, fascicu- 

 late; branches of the termi- 

 nal inflorescence about 2 

 dm. long, erect; the lower 

 pistillate spikelets few, the 

 upper staminate f)nes num- 

 erous, about 8 mm. long, 

 green (ir purple, the outer 

 glumes faintly 7 to 11 

 nerved, acute or somew hat 

 obtuse, scabrous on the 

 keel and margins near the 

 apex. 

 A very distinct species, at once 

 recognized by its broad and rather soft pubescent leaves and hispid sheaths. 

 Collected on the road ))etween Colotlan and Bolanos, State of Jalisco, 2841 J. N. Rose, 



Sejjtemlter 7, 1897. 

 *Isch8emuin latifolium Kuntl\, Rev. Gram. 1: 168 (1835). 



Under the spray of the Casca<le in tlie Barranca of Texola, near Jalapa, altitude 

 1,100 m., 8f06C. C.Pringle, April :;o. IS99. 



Fig. l.— Trijtmnim pilosum Scribn. i.t Morrill: 



spikelet. 



.\ staminate 



