70 



E. Hackel. 



Neue Gräser aus Brasilien. 



Von 



E. Hackel. 



(Eingelaufen am 24. Mai 1914.) 



1. Panicum (Sect. Harxiostacliys) Jürgensii Hack. n. sp. 



Culmi 80 — 140 cm alti stibcompressi, apice puhescentes ceterun 

 gldherrimi, plurinodes, simplices. Vaginae teretiusculae internodü 

 suhsuperantes glaherrimae nisi faiicihus ciliatae. Ligula hrevissimc 

 memhranacea truncata. Laminae e hasi angustata lanceolato-Unearei 

 acuüusculae, inferiores ad 50 cm longae superne ad 10 mm latae 

 superiores culmi mox decrescentes, summa ad mucronem 2 — 4mn 

 longum redacta, omnes rigidae, erectae, parte infima subconvolutat 

 superne planae (in ^js superiore latiores), in ligidae dorso pili 

 stipatae, supra glahrae nervis crehris prominentihns suhcontigui 

 percursae, subkis pilis adpressis plus minus dense ohsiiae vel glahre 

 scenies, marginihus laeves. Bacemus ierminalis solitarius rohusttii 

 suhfalcatus ad 15 cm longus rhaclii lata (spicidis plus triplo latiore^ 

 concava^ spiculas omnino vel ad ^js usque occultans^ explicata 6 mn 

 lata chartacea (etiam marginihus), glaherrima; sjncularum pedicell 

 solitarii v. hini hrevissimi glaherrimi. Spiculae imbricatae, inordinati 

 3 — 4-seriatae patulae flavo-viridulae glahrae ohovato-vel clavato-oh 

 longae, 5 mm longae infra apicem 2 mm latae, valde convexae. Gluma 1 

 parvula (O'Smm lg.) hyalina, truncata emarginata enervis ; IF^ spi 

 culam suhaequans ohovata chartacea valde convexa, apice rotundaü 

 cucullata, margine incurvo erosula, nervis 9 extus prominentibiis per 

 currentihus adjectis aliquot intermediis tenuihus hreviorihus percursa 

 III. spiculam aequans, chartacea, ovali-ohlonga apice ohtusissinu 

 cucullata, margine apicali hyalino incurvo, in ipso apice chartaca 

 denticulis 8 minutis triangidarihus acutis quasi minute tricornis 

 dorso depressa, 7-nervis, paleam fovens aequilongam ohlongam acutius 

 culam hicarinatam memhranaceam floremque mascidum triandrun 

 antheris 2 mm longis; gluma IV. spiculam aequans elliptico-lanceolatt 

 acutiuscula cartilagineo-chartacea ohsolete 3-nervis, laevis sed noi 



