134 ANALES DE LA SOCIEDAD CIENTÍFICA ARGENTINA 



zz 6-8'" lat.), mucronulali, undulati^, margine zona perangustis- 

 sima (oculo nudo inconspicua) discolori-scariosa, densissime 

 minutissimeque ciliolato-serrata ornati; epiphyllo obscure viride, 

 glabrato v. pilis raris adsperso, hypophyllo pallidiore saepius 

 glabrato, sed praecipue in juventule minute adpresseque pube- 

 rulo-piloso, basi semper tamen densias subbarbatuluS;, ulrisque 

 plus minusve subtiliter striato-nervosis, ñervo primario glabro, 

 pallescente, tantum inferné usque ad médium prominulo. Ra- 

 chis primaria, seu pars culmi suprema ac racemifera, longiu- 

 scula (10-1 5" long.i= 0,5-0,6'" crass.), aphylla minutissime den- 

 siusculequelongitudinalilerimpresso-striata, non v.vix angulosa, 

 supra racemos brevitercomplanato-subexcavata, glabra V. minute 

 denseque áspera, viridis, simplex, usque ad médium nuda. Ra- 

 cemi 5-7 remoti, alterni, erecto-patentes, simplices, 2-3 inferi 

 majores (10-15'" long.) remotiores5-8-spiculiferi, 2-3 superi bre- 

 viores (2-5'" long.), '1-2-spiculigeri, eorum racliide gracili (0,5'" 

 diam.), recta v. vix flexuosa angulosa, ad basin et ad pedicel- 

 lorum ortum pilosula, ceterum aspero-papillulosa, ápice (ut 

 etiam in primaria) pedicelliformiter elongata (3'" long.), nuda, 

 vértice truncato-subnoduloso, sterili (an semper?), Spiculae se- 

 cundae, monostichae, sublaxiusculae, alternae, geminatae, bi- 

 formes, altera sessilis abortiva, altera pedicellata fructífera; 

 abortivae sessiles ad basin e latero externo pedicellorum ferti- 

 lium, minutae (1-2'" long. = 0,3-0,4'" diam.), subbracteiformes, 

 virides, lanceolato-subulatae, ad glumam saepius, unicam 

 reductae, inferam majorem involuto -subulatam, superio- 

 rem (rarius praesentem) rainorem includentem, imperspicue 

 5-nervem , glabram v. minutissime papilluloso-'asperam. 

 Pedicelli fructiferarum breviusculi (1'" long.), adpresso-erecti, 

 acutiuscule trigoni, basi ad angulum externum breviter rigidu- 

 leque barbulati, ceterum asperi, virides, apicem versus non v. 

 lenissime incrassati, vértice articulato-truncato, spiculis delap- 

 sis, aream discoideam acute marginatam, centro umbonato-pro- 

 minulam exerentes, in rachide alterni. Spiculae fructiferae ad 

 apicem pedicellorum solitariae, mediocres (3-3,5'" long. =2-2,5'" 

 diam.), cum pedicello articulatae, facile deciduae, 3-florae; 

 gluma inferior nulla; gluma superior majuscula (2'" long.-l'" 

 lat.), spiculae fere longitudinis, tenui-membranacea, lanceolata 

 V. ovato-lanceolata, dorso subcarinata, antice attenuato-acutata, 

 subula brevi armafa, postice abrupte contracto-rotundata, 3- 



