50 ARKIV FÖR BOTANIK. BAND 13. NIO 3. 



13. X. guiaiieiisis Steudel (1855). 



Synops. plant. glum. II, p. 285. — Alb. Xilsson, Stud. Xyrid. (1892), p. 55. 

 — X. Gardneri Malme, Beitr. Xyr.-Flor. Südam. (1901), p. 8 et tab. fig. 1. 



Guyana: holland., Patrick-Savanna (Gonggrijp): britan. 

 (R. SCHOMBURGK n. 1058). 



Venezuela: pr. Maypures ad flum. Orinoco (Spruce 

 n. 3729). 



Ceara: (Gardner n. 1058). 



14. X. filiscapa Malme (1906), 



in Fedde, Repert. spec. nov. Ill, p. 1 12. 



Amazonas: Manäos, in arenosis humidis (Ule n. 6172). 



15. X. subuiiiflora Malme (1912), 



in Recueil des Trav. bot. néerland. Vol. IX. Livr. 2, p. 129. 



Guyana: Surinam, in arenosis humidis (Splitgerber n. 

 990). 



16. X. Orisebacliii Malme n. nom. 



X. americana Griseb.\ch, Flora of Brit. Westind. Isl. (1864), p. 526 [non 



AuBLET, Hist, des plantes de Guiane frän?. (1775), p. 40, quae sec. descript. 



et ex icon, est Abolbodce species]. 



Csespitosa, foliis gracillimis, filiformibus. Folia subte- 

 retia, filiformia, vulgo 2,.ö— 3,.^) cm longa, circiter 0,2 mm 

 lata, apice obtusa et^ssepe incrassata, laevia glaberrimaque, 

 ssepissime purpureo-violascentia, in vaginam abrupte abeuntia 

 sextam fere partem folii occupantem, ligula conspicua muni- 

 tam, eciliatam, sordide stramineam v. leviter roseo-viola- 

 scentem, jam superne lamina latiorem, inferne paullum tan- 

 tum dilatatam. Scapi subteretes, 8 — 11 cm alti, circiter, 0,3. t 

 mm crassi, laeves glaberrimique, in sicco nervoso-striati, basi 

 folio longevaginato, ceteris paullulo longiore involuti. Spica 

 valde pauciflora, vulgo tantum biflora, fusiformis v. ellipsoi- 

 dea, 2,5 — 4 mm longa, 1 — 1,5 mm crassa; bracteae infima? 

 ovato-ellipticae v. ovato-lanceolatse, l,h — 2 mm longse, apice 

 acutae, fere inde a basi obtuse carinatee, area dorsali lineari- 

 lanceolata notatse, intermedise oblongo-ellipticse v. obovato- 



