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COSSON. — SPOROBOLUS TOURNEUXII ET L^TEVIRENS. 251 



sparsis patentibus donato, multistriata striis in facie superiore scabris 

 in inferiore Isevigatis, inferiora approximata et disticbe inibricata vagina 

 brevi, caulium floriferorum superius longevaginatum limbo vagina mullo 

 vel multoties breviore ; vagince multistriata?, glabrae, orepiloso-barbatw; 

 ligula adpilos vaginam coronantes redacta, Panicida erecta, l'|-3-^ cen- 

 tim. longa, supra folium superius longe vel longiuscule exserta, oblonga 

 vel oblong o-suhpyramidata sp i ci for mi-sub cojitr a eta, ramosa, ramis 

 bre vibus, hre\issim(', ramulosis elconfertim mitltifloriSjSolitariiSy infe- 

 rioribus suberectis velpatulis et plus minus remotis, superioribus erectis 

 approximatis. Spiculse parvae, 2 millim. longas, oblongo-lanceolatse, sor- 

 dide albidse, a latere vix compressac, uniflorse flore sessili bermaphrodito 

 absque rudimento secundi floris. G/ww^^tenuiter membranacese, glabrae, 

 suhiequilongcB flore subdimidio vel subtriplo breviores, concavae, infe- 

 rior ovata cuspidata, superior latior ovato-oblonga apice eroso-denticulata 

 interdumcuspidata. Glumella? membranaceo-subchartaceae, glabrae, sub- 

 aequilonga}, inferior oblongo-lanceolata naviculari-concava valide uniner- 

 'ia nervo superne scabriusculo, superior oblonga apice eroso-denticulata 

 vel bidentata, dorso bicarinata carinis scabridis, inter carinas canalicu- 

 lata et demum caryopsi accreta in fundo canaliculi in lacinias duas col- 

 laterales conformes longiludinaliter fissa. Squamulae 2, minutissima), 

 truncatae, glabrae. Stamina 3; anthera} oblongse, glumellissuba3quiloiigifi. 

 Ovarium ovato-oblongum, subsessile, glabrum ; stigmata 2, subsessilia, 

 plumosa. Caryopsis inter glumellas libera, obovata, glabra, macula bilari 

 basilari minima punctiformi vix perspicua, pericarpio laxo lenuiter 

 membranaceo hyalino dorso demum longitudinaliter fisso et fissura 



semini madefacto exitum prwbente. ^, Florifer et fructifer 9 junio 1884 

 lectus. 



In Tunetiae saharensis ditione Djerid in arenosis et salsuginosis ad 

 palmetum et in palmeto Scdada detexit amicissimus A. Letourneux 

 (Miss. 1884) cui plantam lianc in genere singularem et distinctissimam 

 lubenlissimo aniino dicatam volui. 



Sporoholus Isetevirens Coss. sp. nov. 



Planta perennis, dense ccespitosa^caudice pluri-vel multicipile cum 

 caulibus floriferis fasciculos steriles foliorum nonnullos emittente 

 foliorutn emarcidorum vestigiissquamiformibus obtecto, fibris radicalibus 

 crassis valde pilosis. Culmi omnes fertiles, 1540 centim. longi, rigiduli, 

 S'^bri, basi vaginis foliorum fere obtecli, ssepius plures et insequilongi, 

 saepius 3-nodii nodis fuscescentibusglabris, erecli recti vel inferne geni- 

 culati baud radicanles, simplices. Folia laele virentia, culmis multoties 

 breviora, rigidula, patula, linearia acuminata, margine subcartilagineo 

 ^^^^'^eato^scaberriinay glabra, multislrlala striis laevigatis, plana apice 



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