448 GRAMiNEiE Cenchrus . 



Caryopsis oblonga glumellis inclusa sed libera. — Spiculse in invo- 

 lucro 1-3, involucris in spicas simplices disposilis. 



1. C. catharticus (Del. Gat. Monsp. 1838 et Linn.XIlI Lit. 103) 

 annuus, caulibus ereclis vel ascendentibus inferne saepe geniculatis, 

 foliis scabridis lanceolatis acuminatis ciliatis vel glabris, involucris 

 subsessilibus in spicam cylindrieam laxiusculam disposilis a basi 

 subtruncata obconicis subbifloris pluriaculeatis, aculeis ima basi in 

 patellam coalitis rigidis pungentibus externis brevissimis patentibus 

 interioribus validioribus flosculos subsuperantibus ereclo-patul is 

 dorso sulcalis retrorsum scabris interdum inferne ciliatis, glumis 

 ovatis aculis membranaceis inferiore breviore superiore glumellis 

 flosculorum oblongis obtusiusculis subbreviore O C. Mtoticus Fig. 

 et Not. Fragm. 64, tab. 33 (1858). — C. echinatus Rich. Fl. Abyss. 

 non L. — Elymus Caput Medusa, Forsli. Descr. p 25 



Hab. in Egypto ad ripas Nili (ex Figari). E ditione nondum vidi. 



Hsec species C. echinato Americano facie similis ab eo involucri partibus 

 ima basilantum nec in cupulam lobatam connalis differt,asequentibusinvo- 

 lucri partibus duris rigidis aculeiformibus retrorsum aculeolatis distincta. 



Ar. Geogr. Nubia, Abyssinia, Guinea, Insulse Gapitis Viridis, Africa tropica. 

 India boreali-occidentalis. 



2. C. montanus (Nees in Royle Illustr. Pl. Ind.) annuus, cul- 

 mis pluribus procumbenti-ascendentibns geniculalis foliosis foliis 

 iinearibus acuminatis flexuosis planis patule hirtis vel glabrescenti- 

 bus,' involucris brevissime pedicellatis 1-2-spicuIalis globosis in spi- 

 cam cylindricam densiusculam dispositis, setis involucri externis 

 subulalis brevibus adpressis interioribus 8-10 lanceolatis pungenti- 

 bus ad terliam parlem in cupulam obconicam coalitis erectis scabris 

 interdum margine ciliatis spiculas vix excedentibus, glumis membra- 

 naceis ovalis acutis subcarinatis subinsequalibus flosculis tertia 

 parte brevioribus, glumellis flosculi neutri et hermaphroditi oblongis 

 acutis superne 5-nerviis, palea angusliore O. C. Schimperi Hochst 

 et Steud. in Schimp. exs. — C. tripsacoides Fresen. Abyss.et R. Rr. 

 qui in Salt app. nomen solum edidit. — C. bulbifer Hochst.in Schimp. 

 Abyss. exs. — C. unijlorus Ehrenb. exs. 235 ! 



Hab. in Egypti Oaai magnfl, ad Hibe et ad litlus Arabicum Egypti supe- 

 rioris inter Kosseir et Ras Benass (Schweinf. 725! et 1016I)Involucrafructi- 

 fcra semine Gaunabeos paulo majora. 



Ar. Geogr. Nubia, Abyssinia, Arabia tropica, India borealis. 



3. C. pennisetiformis (Hochst.et Steud. in Schimp. exs. 978) 

 annuus, culmis tenuibus procumbenli-ascendentibus geniculatis, 

 foliis anguste lanceolatis acuminatis vaginisque asperis et pilis e 

 tuberculo ortis plus minus obsitis, involucris subsessilibus globosis 

 1-2-spiculatis in spicam breviter cylindricam densiusculam disposi- 

 tis, setis involucri externis subulatis brevibus interioribus validiori- 



