1963] 



BOTANY OF THE GUAYAXA HIGHLANDS PART V 



23 



Distribution. Specimens from Cerro Guaiquinima, Bolivar, Venezuela, viz., 

 Mag wire 32751, 32798, have been referred here. Otherwise the species is known 

 only from the type locality, and the nearby Cerro Huachamacari {Maguire, 

 Cowan d- Wurdack 30123). 



26. Xyris esmeraldae Steyermark, Fieldiana Bot. 28(1): 109. /. 16, C. 1951. 



Type. Esmeralda Savanna, alt. 200 m, Cerro Duida, Amazonas, Venezuela, 

 Steyermark 57821 (isotype NY). 



Distribution. Rather widely distributed in sandy savannas of southern Ama- 

 zonas, Venezuela; adjacent Brazil: and Vaupes and Amazonas, Colombia. 



27. Xyris tatei Malme, Bull. Torrey Club 58: 323. pi 24, f. IB. 1931. 



Type. Moist slopes of Savanna Hills, alt. 4400 ft, Cerro Duida, Amazonas, 

 Venezuela, Tate 835 (holotype NY). 



Distribution. Represented otherwise only by Tate 778 (NY) from the type 

 locality. 



28. Xyris lugubris Malme, Bull. Torrey Club 58: 324. pi. 24, f. 1A. 1931. 



Type. Summit Peak No. 7, alt. 7100 ft, Cerro Duida, Amazonas, Venezuela, 

 Tate 639 (holotype NY). 



Distribution. Confined to the high sandstone mountains of Amazonas, Vene- 

 zuela, viz., the Cerros Sipapo, Paru, Huachamacari. Duida, and Neblina, and 

 doubtfully from the Chimanta Massif, Bolivar. 



29. Xyris scabridula Steyermark, Fieldiana Bot. 28(1) : 111. 1951. 



Type. Stems dark black green, around rills on rocky dry ridge top, Brocchinia 

 Hills, alt. 1700-1900 m, Cerro Duida, Amazonas, Venezuela, Steyermark 58168 

 (isotype NY). 



Distribution. Known only by the type collection, and Steyermark d' Wurdack 

 1010 obtained on the Chimanta Massif, Bolivar. 



30. Xyris delicatula Maguire & Smith, sp. now Fig. 7, A-F. 



Herbae acaules, cespitosae ; foliis ad 29 cm longis ; vaginis 8-11 cm longis, 

 sulcatis, rubescentibus, basi abrupte triangulari-auriculatis, Lotus dense longeque 

 ciliatis. alibi glabris; laminis teretibus, subulato-acuminatis, 1 mm diametro, 

 transverse rugulosis ; scapo gracillimo, 28-43 cm alto. 0.5 mm diametro, tereti, 

 ecostato, laeve, glabro ; vagina scapi omnino foliacea, longe laminata ; spica el- 

 lipsoidea, dein ex sicco obconica, 7-8 mm longa, subpauciflora : bracteis decus- 

 satis, integris, atris, area dorsali carentibus, late convexis, apice brevissime cari- 

 natis, basilaribus valde reductis, alteris late obovatis, sepala subaequantibus ; 

 sepalis lateralibus liberis, linearibus, acutis, 6 mm longis, anguste carinatis, juve- 

 nilibus dense piloso-ciliatis ; laminis petalorum obovatis, 4 mm longis ; staminodiis 

 minimis, penicillatis ; filamentis brevibus ; antheris oblongis, 1.5 mm longis ; pla- 

 centis basilaribus; seminibus crasse ellipsoideis, 0.6 mm longis, biapiculatis. 



Type. Frequent in wet hummocks, Camp Savanna, Campo Grande, alt. 1500 

 m, Cerro Sipapo (Paraque), 10 Dec 1948, Amazonas, Venezuela, B. Maguire & 

 L. Politi 27580 (holotype NY, isotype US). 



Distribution. Known only by the tj^pe collection. 



