1953] 



BOTANY OF THE GUAYANA HIGHLAND 



97 



ERIOCAULACEAE" 



Eriocaulon atabapense Moldenke. 



In moist sand among rocks 15 km. above San Fernando, Rio Atabapo, Rio Ori- 

 noco, Nidguire 29256. The species is known only from this and three other collec- 

 tions: Williams 13858, 14084 from the Rio Atabapo, and a specimen without data 

 in the Herbario Nacional de Venezuela which is probably a duplicate of one of 

 the Williams collections. A. C. Smith 2280, cited as this species in °hytologia 3: 

 182 (1949), proves to be E. tenuifolium. 



Eriocaulon humboldtii Kunth. 



Occasional herb in wet border of Savanna III, 125 m. alt., Cerro Yapacana, Rio 

 Orinoco, Waguire, Cowan, & Wurdack 30464. The species ranges from Colombia 

 (Meta) and Venezuela (Amazonas, Anzoategui, Bolivar, and Delta Amacuro) to 

 British Guiana and Brazil (Amazonas and Mattogrosso). 



Eriocaulon tenifolium Klotzsch. 



With chalky-white heads, frequent in wet savanna northwest of the base of 

 Cerro Moriche, 150 m. alt., Rio Ventuari, Waguire, Cowan, & Wurdack 30^84. The 

 species is represented also by Schomburgk 285 and 448 and A. C. Smith 2280 from 

 3ritish Guiana. It has been reported from Bolivar, Venezuela, and from Amazonas 

 and Bahia, Brazil, but perhaps erroneously. 



Paepalanthus capillaceus var. proliferus Gleason. 



Submerged aquatic perennial herb, with heads emergent white, becoming brown, 

 abundant in the bed of Culebra Creek, 1200 m. alt., Cerro Duida, Rio Cunucunuma, 

 Waguire, 'Cowan, & Wurdack 29611; locally common in bed of Cano Culebra, 1300 

 m. alt., Cerro Duida, Waguire & Waguire 29153. Only some of the heads on these 

 specimens have the proliferations described by Gleason; however all the heads 

 show the characteristic pilosity not seen on any of the specimens of the typical 

 form of the species thus far examined by me. The variety is known only from 

 Cerro Duida (Steyermark 58138) and, in British Guiana, from Mount Roraima (Tate 

 263, 552) and the Kaieteur Plateau (Waguire & Fanshawe 23243). 



Paepalanthus fasciculatus (Rottb.) Korn. 



Frequent on white sand, savanna in the vicinity of Base Camp, 150 m. alt., 

 Cerro Sipapo (Paraque), Waguire & Politi 28309. A widely distributed and very 

 variable species known from Colombia (Cundinamarca, Meta, Santader del Norte, 

 and Vaupes), Venezuela (Amazonas and Bolivar), British Guiana, Surinam, French 

 Guiana, and Brazil (Amazonas and Para). 



Paepalanthus kunhardtii Moldenke, sp. nov. 



Herba parva caulescens; caulibus brevibus brachiatis; foliis rosulatis oblongo- 

 ovatis erectis utrinque lucidis 2o5-4 cm. longis, 3-5 mm. latis, ad basim longe 

 villosis subcoriaceis; vaginis laxiusculis 4-5 cm. longis multistriatis glabris, 

 lamina 5-6 mm. longa erecta longe ciliata; pedunculis graciliusculis brunneis 

 19-23 cm. longis tricostatis dense laxeque pilosis; capitulis hemisphericis atro- 

 griseis 5-8 mm. diametro. 



Small caulescent herb; stems L5-3 cm. long, often short-branched, densely 

 long-villous; leaves rosulate, those at the tip of the main stem and of the branches 

 forming what appears to be one many-leaved rosette, oblong-ovate, bright green 

 and shiny on both surfaces, erect, 2.5-4 cm. long, 3-5 mm. wide at the mid-point, 

 ampliate-clasping at the base, glabrous on both surfaces except for the long- 

 villous base, acute or subacute at the apex, thick-textured or subcoriaceous; 



By H. N. Moldenke. 



