ÖSTERREICHISCHE 



Herausgegeben und redigirt von Dr. Richard R. v. Wettstein, 



Professor an der k. k. Universität in Wien. 



Verlag von Carl Gerold's Sohn in Wien. 



LIL Jahrgang, N"- 10. 



Wien, October 1902. 



Neue Grräser. 



Beschrieben von E. Hackel (St. Polten). 



92. Zeugites Pittieri Hack, 



Culmus validus, fere aruDdinaceus, ad 1*5 m altiis, teres gla- 

 berrimus. Vaginae arctae, teretes, iuternodiis saepius longiores, 

 altero margine ciliatae rarius glabrae, ore breviter obtuseque auri- 

 culatae. Ligulae brevissiraae, marginiformes, denticulatae. Larainae 

 basi in petiolura circ. 5 mm longum planum dorso subcarinatum 

 ibique pubescentem constrictae, e basi rotundata v. leviter cordata 

 elongato-laneeolatae, aeuminatae, ad 26 cm lg., 4—6 cm lt., glabrae, 

 subtus pallidiores, ibique reticulato-nervosae, margine seabre, tenui- 

 nerves. Panieula late ovata lasiuscula patentissima ad 26 cm lg. 

 et basi aeque lata, rhachi glaberrima, ramis solitariis raro oppositis 

 anthesi angulo recto patentibus elongatis fere a basi ramulosis 

 laevibus, in axillis puberulis, ramulis plerumque iterum divisis 

 plurispiculatis, spiculis aequaliter dispositis patentibus breviter pedi- 

 cellatis. Spiculae oblongae, 10 — 12 mm lg., 4 — 8-flores, floreirao^, 

 reliquis d", viridulae. Glumae steriles subaequales (circ. 4 mm lg.) 

 vel I pauUisper longior et latior, obovatae, rotundatae, elevate 9- 

 nerves, nervis reticulatis, I basi parce pubescens vel glabra, quam 

 flos $' vix V4 brevior. Gluraa fertilis floris 9" ovata, dorso inferne 

 subgibba, apice obtusiuscula, minute mucronulata v. mutica, her- 

 baceo-chartacea, 7 — 9-nervis, apice breviter eiliata, basi saepe 

 puberula; glumae fertiles florum cf late lanceolatae, acutiusculae 

 V. minute apiculatae, 4 mm lg., 5-nerves, glaberrimae; paleae glu- 

 mas aequantes, obtusae, bicarinatae, carinis subalatis glabris. An- 

 therae 3 mm lg. 

 Costarica: in silvis ad Alto del Rodeo (1100 ra s. m.) leg. Pittier 



(nr. 1617), ad Eodeo de Pucuca (900 m s. m.) leg. id. s. nr. 3328. 

 — Var. Fringlei Hack. Spiculae glabrae. Gluma I. eroso- 



dentata; III. basi glabra, apice eiliata, mutica. 

 Mexico: ad Guadalajara leg. Pringle sub nr. 2322 sub Z. latifolia 



Benth. 



Oesterr. botau. Zeitschrift. 10. Heft. 1902. 



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