182 PROCEEDINGS OP THE AMERICAN ACADEMY 



few-flowered spikelets (1030 Schaffner) ; 934^ Parry & Palmer. The 

 genus Eragrostis is usually credited to Beauvois (1812), but was first 

 proposed (though without a character) by Host (1809), who referred 

 to it these two species, which represent Beauvois' two genera Era- 

 grostis and Megastachya. 



Eragrostis pilosa, Room, & Schult. At San Luis Potosi (1028 

 Schaffner). Identical with 662 Botteri (in Herb. Gray), so named 

 by Munro, and the same as 937 Fendler, and 437, 445, 2594, and 

 2637 Bourgeau. 



Eragrostis lugens, Nees. At San Luis Potosi (1026 Schaffner) ; 

 938 Parry & Palmer. A common grass from Texas (and eastward) 

 to Arizona and Mexico, allied to E. capillaris, Nees. It is more or 

 less villous on the sheaths and at the nodes of the panicle, or often 

 nearly glabrous, the narrow spikelets of 3 to 5 (rarely 6) flowers, the 

 strongly concave bluntish flowering glumes nearly nerveless. It is 

 329 Drummond, 936 Fendler, 2050 Wright, 788 Hall {'' E. capil- 

 laris"), Pringle's " ^. pilifera;' 228, 673 and 2643 Bourgeau, and 

 681 and 682 Botteri (so named by Munro). 



Eragrostis Mexicana, Link. At Parras, Coahuila (1367), and 

 at San Luis Potosi (1029 Schaffner) ; 936 Parry & Palmer. Another 

 common species of Mexico and the region adjacent on the north, allied 

 to E. tenuis, Gray, but with blunter and closer glumes. E. pilifera, 

 Scheele, is probably the same. It includes 2046, 2047 and 2052 

 Wright, 604 Rothrock, and 1031, 1305 and 2625 Bourgeau. 



Eragrostis Palmeri. Culms numerous, slender, erect from a 

 creeping rootstock, 2 or 3 feet high: leaves narrow (1 or 2 lines 

 wide), becoming revolute: panicle open, glabrous; spikelets sessile or 

 shortly pedicellate upon the slender branches, narrowly lanceolate, 

 acute, 3-8-flowered, IJ to 2\ lines long: lower glumes acuminate, 

 scabrous on the keel ; flowering glume concave, rather faintly 3-nerved, 

 acute, slightly scabrous on the keel toward the top. — At Juraz, on 

 the Sabinas River, Coahuila (1368). Allied to E. lugens, but the 

 spikelets mostly nearly sessile and the flowering glumes more strongly 

 nerved, 



Briza rotundata, Steud. At San Luis Potosi (1035 Schaffner) ; 

 935 Parry & Palmer. 



PoA ANNUA, Linn. At Monterey (1365), and San Luis Potosi 

 (1032 Schaffner). 



PoA Ruprechtii, Peyr. in Linnaia, 30. 6. In the mountains east 

 of Saltillo (1366). So named at Kew; scarcely, if at all, distinct 

 from P. Jlexuosa, Muhl. 



