de Agronomía y Veterinaria 
631 
0,5-0*8 mm lat.=arist. 1 — 1.5 mm long.) planiusculae v. vix subcarina- 
tulae rigidae virides v. subcinerascentes, nervis non perspicuis, 
ventre laeves dorso scabrae; flores bini (in quaque spicula sed in 
spiculis lateralibus saepe ad unum reducti) alter sessilis fertilis (7 
mm long.= i,3 mm diam.) breviter aristulatus, alter sterilis muticus 
pedicello glabro e terete compressulo (3 mm long.) fultus; glumella 
infera floris fertilis lanceolata (6-7 mm long.=2,5 mm lat. apert.) 
rigidula 3-nervia (nervis 2 marginalibus vix evolutis saepe additis) 
minutissime punctulato-asperula, arista brevissima (1,5-2 mm long. ) 
ornata, supera bicarinata aequilonga lanceolata margine aspero-ci- 
liolata; flos sterilis erectus |ad glumellam inferam 3-nervem lanceo - 
latam (3-3,5 mm long.= 1-1,5 mm lat. apert.) glabram acutam sed 
muticam reductus. 
Species perpulchra spiculis ternatis, saepius bifloris distinctissima, 
vix E. unifloro Ph. (An. Un. chil. XCIV, f. 349) accedens, ad 
genus Yío?'deum nonnihil vergens. 
^222. Elymus leptostachyus Speg. (n. sp.). 
Diag, Caespitosus gracilis, vaginis inferis pubescentibus caeteris 
glabris plus minusve elongatis, ligula brevissima denticulata, lim- 
bis membranaceo-rigidulis . linearibus utrinque plus minusve pube- 
rulis, culmis elongatis infra médium vaginato-foliiferis, caeterum 
saepius nudis, spica angustissima erecta, spiculis geminis, glumis 
breviter mucronato-aristatis, floribus in quaque spicula 3, primo ses- 
sili fertili, secundo fertili pedicellato, supremo pedicellato sterili, 
glumellis florum íertilium arista ipsas non superante armatis. 
Hab. In pratis dumetosis et in sylvis secus Rio Carren-leofú. 
Obs. Culmi caespitosi fasciculati, fértiles et steriles commixti, basi 
congesti vix arquatuli plus minusve longe densiusculeque fibroso- 
radicati, caeterum recti erecti (60-80 cnt long.) in parte dimidia 
infera (praecipue basi) densiuscule foliiferi, saepius 3-4-nodosi, nodis 
vix constrictis glabris fuscis, vaginis 3 v. 4 internodia superan- 
tibus vestiti, sursum riudi glabri laeves v. vix sub lente valida stria- 
tuli; folia viridia rigidula, vaginis arete adplicitis longiusculis pal- 
lescentibus (3-15 cnt long.) infimis puberulis, caeteris glabris, 
ligula scariosa brevissima (1 mm long.) denticulata, limbis planiu- 
sculis (10 20 cnt long.=3-6 mm lat.) erectis, sursum longe atte- 
nuato-acutatis, utrinque (ad epiphyllum praecipue) minute laxeque 
piloso-pubescentibus; spicae e virescente sordide cinerascenti- 
violascentes apicales erectae (4-8 cnt long. =3 -5 mm diam.j deorsum 
attenuatae superne subobtusatae quandoque laxissimae quandoque 
compactiusculae internodiis racheos breviusculis (4-8 mm long.) e 
latere ventrali planiusculis, ambitu angustissime obtuseque subala- 
tis saepeque asperulis, nodulis parce tumidulis; spiculae semper 
binae in quoque racheos articulo, subaequales v. altera paululo 
major; glumae rigidulae lineari-lanceolatae sursum sensim breviter- 
que attenuato-subaristulatae (5-6 mm long.==i mm lat.=arist. 1 mm 
long.), infera obscure 4-nervia, supera 2-nervia, planiusculae dorso 
