20 NOETH AMERICAN SPECIES OF LEPTOCHLOA. 



Tricuspis (Triplasis) simplex Griseb. Mem. Acad. Sci. and Arts. N. Ser. 8: 

 532, 1862. Plant. Wright. 2. " In rupibus aridis/' Wright, 1551. 



Diplachne simplex Doell in Mart. Fl. Bras., 2 3 : 97. 1878. ' ; Habitat in prov. 

 Piauhy (Gardner n. 2367)-." 



Diplachne spicata Doell 1. c, 159. 1878. This is a correction. "Pag. 97. Delea- 

 tur Diplachne simplex; legatur Diplachne spicata, ut conservetur nomen 

 specificum."' 



Triodia schaffneri Wats. Proc. Am. Acad., 18: 181. 1883. " In the Escabrillos 

 Mountains, San Luis Potosi (1077 Schaffner) closely resembling in habit the 

 Cuban Tricuspis simplex of Grisebach and Diplachne spicata Doell of Brazil. 

 It is clearly a Triodia as the genus is denned by Mr. Bentham." 



Diplachne reverchoniY&sey. Bull. Torr. Bot. Club. 13: 118. 1886. "Collected 

 on granitic rocks, Llano Co., Texas, by Mr. J. Reverchon.'* 



Triplasis setacea Griseb. in Goett. Abhandl., 24: 304. 1879. Plantse Lorentz- 

 ianae). " Pr. la Merced. S.: ad fl. Juramento.'' In his remarks upon this 

 species Grisebach says: "Species T. simplici Gr. (PI. Wright. Cub., II, p. 532) 

 proxima." 



Stems tufted, slender, 1 to 3 dm. high. Leaves usually about one-half the height 

 of the flowering culm, numerous, narrow, slender, and involute. Infloresence 

 reduced to a single spike, 5 to 10 cm. long. Spikelets 4 to 7 mm. long, several 

 flowered. Empty glumes acute, flowering glume short awned. 



Distribution: Texas: Reverchon, 1613; Nealley, 78. Mexico: Pringle, 3267. 

 Argentina: Hieronymus, 337. Brazil: Gardner, 2367. 



Diplachne loliiformis F. von M. of Australia closely resembles this. 



Besides those species mentioned above are three described by Four- 

 nier, which I have not seen. Copies of the original descriptions of 

 these are here appended. 



LEPTOCHLOA LIEBMANNI Fourn. PI. Mex., 2: 147, 1886. 



Culmo elato 2-3 pedali, valde ramoso. stramineo, glabro; foliis infra longe vaginan- 

 tibus mollibus lanceolatis, 4-5 " latis, ligula fimbriata; panicula longa stricta, 

 radiis appressis, secundifloris; spiculis 4-floris, glumis inaequalibus, inferiore 

 aucta dimidio breviore, superiore obtusa obscure trilobata, lobo medio mucro- 

 nato; palea exteriore acuta carinata. 



Antigua, februario (Liebm., n. 248); absque loco (Liebm., n. 244). 



DIPLACHNE PATENS Fourn. PI. Mex., 2: 148. 1886. 



Culmo a basi ramoso, ramis circulariter ascendentibus glabro, striate, stramineo, 

 nodis brunneis, ligula hyalina acuta saepe laciniata, foliis longis linearibus 

 angulo recto divergentibus, acutis; panicula invaginata, radiis alternis patulis 

 flexuosis scabris, spiculis 7-floris; gluma inferiore dimidiam superiorem non 

 aequante. exteriore violacea acuminata carinata scabra: rhachi inter flores 

 flexuosa; palea inferiore carinata, nervo medio prominente acuminata, supe- 

 riore duplo minore, bicarinata, obtusa, apice integra. 



Vera Cruz (Gouin, n. 93). 



LEPTOCHLOA PANICULATA Fourn. Bui. Soc. Bot. France (ser. 2), 27: 

 296. 1880. 



Culmo 3-pedali, cum nodis glabro: foliis latis brevibus, acuminatis, ligula brevi 

 laciniata; inflorescentia pedali, axi paniculae et radiorum scabro; radiis 

 primariis primum patulis, dein divaricatis, in dimidia inferiore parte radiolos 

 semipollicares emittentibus; spiculis 3-4 floris muticis, floribus remotis, glumis 

 sequalibus. palea exteriore bidentata mutica. 



Absque loco (n. 1079). 





