148 H. Schinz: 



Umgrenzung dieser schwierigen Gattungen ist jedoch ohne monogra- 

 phische Bearbeitung derselben nicht thunlich. 



Eragrostis membranacea Hack. 



Annua. Culmi erecti, 60—80 cm alti, simplices, teretes, glaber- 

 rimi. Vaginae laxiusculae, carinato-compressae, ore fimbriatae, cete- 

 rum glaberrimae, carina nervisque quibusdam intramarginalibus glan- 

 dulis impressis notatis. Ligula minuta, ciliaris. Laminae anguste 

 lineares, sensim acutatae, 15—20 cm longae, basi 2 — 3 mm latae, 

 siccando saepius complicatae, erectae, rigidae, pilis patentibus rigi- 

 dulis basi tuberculatis (praesertim in foliis innovationum) adspersae 

 v. iis hirsutae. Panicula 15 — 20 cm longa ovata lucida patentissima 

 rhachi scabra, ramis inferioribus binis ternisve basi nudis ramulisque 

 filiformibus v. his subcapillaribus flexuosis scaberrimis in axillis gla- 

 bris. Spiculae conspicuae, 10 — 15-flores, 10—15 mm longae, 4 mm 

 latae lineari-oblongae , obtusae, pallide plumbeo-virides, nitidae, pedi- 

 cellis plerumque breviores, rhachüla persistente, floribus dense im- 

 bricatis: glumae steriles florentibus contiguis duplo breviores, ovales, 

 obtusae, 1-nerves, floriferae membranaceae, subpellucidae, late ovatae, 

 obtusiusculae, 3 mm longae, 3-nerves, glaberrimae; palea gluma paullo 

 brevior, complicata, curvula ; apice truncato integra, carinis scaberula, 

 persistens. Antherae 1,7 mm longae. 



Ex affinitate E. tremulae Höchst. 



Standort: Olukonda, Ondonga-Stamm (Amboland). 



Eragrostis enodi s'^Hack. 



Perennis, caespitosa, glauca. Culmi erecti, teretes, crassi rigi- 

 dissimi , simplices, visciJuli, glaberrimi, enodes, superne longiuscule 

 nudi. Folia conferta, convoluta, junciformia, pungentia, ligula bre- 

 vissima, .ciliari; Panicula linearis, interrupta, e spicularum glomerulis 

 3 — 4 distinctibus formata, ramis ramulisque brevissimis, non spinosis ; 

 spiculae sessiles, lanceolatae, 10 — 14-florae, circ. 1 cm longae, com- 

 pressae, e pallide stramineo fuscescentique variegatae, rhachilla fragili ; 

 glumae steriles subaequales, lanceolatae, acutae, 1-nerves, membra- 

 naceae; florentes chartaceae, acutiusculae, obsolete 3-nerves, glabrae, 

 scaberulae, palea glumae aequilonga bidentula carinis scaberula, cum 

 gluma fructifera rhachillaeque internodio secedens. — Species maxime 

 insignis, in dificillimo genere facillime recognoscenda, nulli nisi E. spi- 

 nosae Nees affinis, sed paniculae structura, culmoque enodi primo in- 

 tuitu dignoscenda. 



Standort: Angra Pequena, auf der Nautilusspitze. 



