Some new South American Species of Koeleria. 89 



plants of Argentine and can be found in the Herbarium of the Royal Bo- 

 tanical Museum in Berlin and partly in the Herbarium of the Royal Botanic 

 Gardens in Kew near London. 



I restrict myself in the following article to the descriptions and short 

 remarks; details of their systematical position can by found in my general 

 monography of this genus, which will shortly appear. 



1. Koeleria Hieronymi Domin, nov. spec. 



Perennis laxe caespitosa culmis interdum solitariis, vaginis vetustis 

 intus argenteo-nitidulis infimis retrorsum patentibus, culmis valde elatis 

 usque 9 dm altis robustis sed valde mollibus parte tertia superiori nudis 

 et totis dense molliter cano-pubescentibus, foliis radicalibus paucis sub 

 flore saepe subsiccis vaginis patentibus instructis, culmis circa 3— 4-foliatis, 

 foliis culmeis vaginis longis pallidis tenuibus culmos laxe amplectentibus 

 vel totis vel parte superiori subpatentibus striatis molliter sublaxe pubes- 

 centibus, laminis longioribus (circa 1 — 1,5 dm) planis tenuibus valde latis 

 (3 mm usque plus 4 mm) subglaucescentibus öat mollibus saepius fere 

 glabris partim scabris ad marginem scabriusculum breviter ciliatulis in- 

 structis, ligulis glabris laceroso-incisis protractis 1,5 — 3 mm longis, pani- 

 culis cyündricis c. 10 — 13 cm longis et tantum c. 8— 10 mm latis inferne 

 semper interruptis albescenti-nitidulis densissimis haud lobatis vel cum 

 parum lobatis tunc lobis brevibus densissimis, spiculis fere sessilibus vel 

 brevissime petiolulatis parvis pallidis lineari-lanceolatis c. 4 mm longis 

 bifloris, glumis longitudine latitudineque inaequalibus glaberrimis late 

 scarioso-marginatis, superiori c. 4 mm longa acutata vel in apicem bre- 

 viter mucroniformem protracta flosculis parum breviori, inferiori angustiori 

 acuminata tantum c. 3 mm longa flosculis conspicue breviori, glumellis 

 lineari-lanceolatis glabris superne scarioso-marginatis acutatis interdum 

 breviter mucronatulis vel paulo sub apice aristulis dorsalibus minimis 

 apicem glumellarum vix attingentibus et numquam superantibus munitis, 

 flosculo secundo mediocriter longe pedunculato, rhachide breviter protracta 

 glabra vel subglabra, paleis glumellis paulo brevioribus apice breviter bi- 

 dentatulis. 



Floret Januario. 



Exsicc: G. Hieronymus et G. Niederlein: Flora Argentina no. 703. 



Habitat in Argentina: En las cercanias del Pie de la buesta, mas 

 arriba del Vallecito; Sierra Famatina, Prov. de la Rioja. Leg. 15.— 20. I. 

 1879 G. Hieronymus et G. Niederlein (H. Berol.). 



Species egregia et cum florae Argentinae Koelerüs sequentibus formis 

 intermediis haud conjuncta esse videtur. Caespitibus laxis, colore canes- 

 centi, statura robusta, culmis mollibus pubescentibus, vaginis subpatenti- 

 bus molliter pubescentibus, ligulis protractis, panicula densissima angusta, 

 spiculis parvis facile dignoscitur. 



2. Koeleria argentina Domin, nov. spec. 



Pluriculmis sed minus dense caespitosa vaginis infimis sub flore sub- 

 aphyllis tenuibus saepe subpatentibus nitidulis, culmis gracilibus c. 4—5 dm 



