46 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



3-nerved, 4 mm. long; lemma lanceolate, plainly 5-nerved, convex, the whole back 

 appressed-scabrous or nearly hirtellous, about 7 mm. long, acuminate or often short- 

 awned; palea linear- lanceolate, cleft at apex, about equaling the lemma, the nerves 

 scabrous, the inflexed sides half as broad as the internerve. 



Festuca fratercula Rupr. 

 Festuca fratercula Rupr.; Fourn. Mex. PL 2: 124. 1881. 



"Culmo fere tripedali scabro; foliis 3 ^^^ latis, retrorsum scabris, longis, planis, 

 apice longe convolutis; ligula brevissima; panicula libera effusa fere pedali folium 

 summum longe superante, radiis geminis divaricatis inaequalibus parce divisis; 

 spiculis 3-floris cum terminali quarto abortivo; glumis inaequalibus acutis, fioribus 

 teretibus remotis, palea inferiore acuta potissimum in floribus summis breviter 

 mucronata, glabra; squamulis lanceolatis ovarium aequantibus. 



" In humidis inter Pinos montis Orizabensis, 11-12000 ^ (Gal. n. 5778) ; Cumbre de 

 Estepa, augusto (Liebm. ) " 



We have seen no Mexican specimens of this species, but have referred to it several 

 collections from the United States. f< 



Festuca amplissima Rupr. 



Festuca amplissima Rupr.; Fourn. Mex. PI. 2: 125. 1881. 



Type collected by Galeotti, " Secus rivulos pr. Vaqueria del Jacal in monte Oriza- 

 bensi," 3.225 meters. 



DESCRIPTION. 



Culms stout, 1 to 1.5 meters high, smooth or scabridulous, firm, 4 or 5-jointed; 

 sheaths glabrous, striate above, shorter than the internodes, the lowermost becoming 

 fibrous when old; ligule very short, truncate; blades flat or loosely involute, 6 to 12 

 mm. broad, 30 to 50 cm. long, slightly scabrous on each side; panicle 30 to 50 cm. 

 long, erect, diffuse; rays in about 8 sets of 2 or 3 each, scabrous, branched; spikelets 

 green or purplish, long-stalked, oblong-elliptic, flattened, 5 to 9-flowered, 9 to 13 

 mm. long; joints of the rachilla scabrous, about 1 mm. long; glumes unequal, gla- 

 brous, the lower 1-nerved, 3 to 3.5 mm. long, the upper broader, 3-nerved, 5 to 

 6 mm. long; lemma 6 to 7 mm. long, lanceolate, finely scabrous, subcarinate, the 

 nerves rather prominent, acute; palea acute, a little shorter than the lemma, the 

 nerves scabrous, the infiexed sides about half the width of the internerve. 

 Readily recognized by its stout habit and ample floribund panicle. 

 The following specimens have been examined: 



Sierra de Ajusco, Pringle 9555. 



Sierra de San Felipe, C. L. Smith 924. 



Mount Zempoaltepec, Nelson 648. 



Mountains near Patzcuaro, Pringle 3945. 



Mount Orizaba, Liehmann (ex Fournier). 



Desierto Viejo, Bourgeau 1307 (ex Fournier). 



Festuca livida (H. B. K.) Willd. 



Bromus lividus H. B. K. Nov. Gen. & Sp. 1: 150. pi. 689. 1815. "Crescit in alta 

 planitie Tolucana, alt. 1380 hexap. ' ' 



Schedonorus lividus R. & S. Syst. 2: 707. 1817. 



Festuca livida Willd. in Spreng. Syst. 1 : 258. 1825. 



Heller ia livida Fourn. Mex. PI. 2: 129. 1881. All of these are based on Bromus 

 lividus H. B. K. 



Festuca grandiflora Steud. Syn. PI. Gram. 311. 1854. Based on Heller's 315 from 

 Volcano de Toluca. 



«See p. 39 above. 



