EKMAN, NEUE BRASILIANISCHE GRASER. 29 
Chl. calvescens Hack. zu Chl. bahiensis STEUD.); auf der Basis 
des vorhandenen Materials kann ich jedoch die beiden Spe- 
zies nieht als eine und dieselbe ansehen. 
Bouteloua brasiliensis n. sp. 
Tafel 4, Fig. 4; Tafel 6, Fig. 15. 
Perennis, rhizoma crassum. Culmi erecti, ad 12 dm alti, 
simplices, graciles, teretes, glaberrimi, lz:ves, 5—7-nodes, nodis 
fuscis. Folia per culmum equaliter disposita: vagina arcta, 
teretes, striate, manifeste pilose, pilis basi tuberculatis, 
glaucescentes, infimz internodiis paulo longiores, superiores 
iisdem subduplo breviores; ore piloso; ligula 1 mm longa, 
straminea, ciliata; laminz longissime lineares, ad 40 cm longz, 
4,5 mm tantum late, sensim tenuissime acutatz, ubique laxe 
pilose, supra scabra, margine scaberrime, subtus subleves, 
glaucescentes, nervo medio inferne prominulo, lateralibus 
4—5 distinetis, livido-viridibus. Inflorescentia fere ut in 
Bouteloua curtipendula (Mcux.) Torrey (B. racemosa Laa.), 
id est, spice numerose (numero ad 45), breves, in racemo 
disposite erecto, gracili; secundo, ad 25 cm longo, infime 
remotas, superiores internodiis suis duplo-triplove longiores, 
omnes brevissime pedunculate, rhachi communi triquetra, 
scabra. Spies sine aristis 5—6 mm longe, spiculas 4 gerentes, 
rhachi applanata, fere 5 mm longa, supra insertionem spicu- 
larum elongata, hie bicostata, costa altera breviore, margine 
ciliato-scabra. Spiculze lanceolato-lineares, superiores spice 
optime evolute, infima tabescens (an semper ?), livido-virides. 
Gluma I. anguste lanceolata, ad 4,5 mm longa, acuta, hyalina, 
ubique scabra, uninervis, nervo in setulam scabram producto; 
gluma IT. late lanceolata, ad 6 mm longa, uninervis, nervo 
suleato, valido, reliquis glume prime; gluma III. ambitu 
oblonga, 5 mm longa, tripartita, laciniis acutis, setigeris, sub- 
equilongis, 3-nervis, nervis validis, in setulam productis, inter 
nervos extus pilosa. Palea anguste oblonga, glumam &quans, 
biearinata, carinis scabris, bidentula, dorso inter carinas et 
in marginibus breviter pilosa. Stamina 3, filamentis brevi- 
bus, antheris linearibus, 2,5 mm longis. Flos sterilis ad glu- 
mam unam (glumam IV.) redactus triaristatam, arista media 
