282 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



\Vol. 9, No. 3 



stigmas 3, about 1 mm long; ovary oblong, about 0.5 mrn long, glabrous, 3-sul- 

 cate, 3-celled. 



Type: Bassett Maguire 32840, frequent in a bog under extensive "forests" of 

 Stegolepis sp. in the Big Canyon drainage along the \7est Escarpment 1 km west 

 of Cumbre Camp at 1800 m alt., Cerro Guaiquinirna, Rio Paragua, Bolivar. Vene- 

 zuela, December 30, 1951, New York Botanical Garden. 



Syngonanthus cowani var. longipedunculatus Moldenke, var. nov. 



Haec varietas a forma typica speciei pedunculis filiformibus 8-13 mm longis 

 recedit. 



This variety differs from the typical form of the species in having its filiform 

 peduncles 8-13 mm long, surpassing the uppermost leaves. 



TYPE: Bassett Maguire, John J. Wurdack, & George S. Bunting 36290, on a 

 savanna 1 km west of Cacagual (Piedra Cacaguati), Vaupes, Colombia, on the 

 Rio Atabapo, alt. of 100 m, November 19, 1953, New York botanical Garden. 

 The collectors note that the plant was locally occasional and had white flowers. 



Syngonanthus pakaraimensis Moldenke, sp. nov. 



Herba acaulescens; foliis densissime rosulatis recurvatis linearibus suba- 

 cutis plusminusve dense sericeo-pilosis, ad basin -densissime albido- vel cine- 

 reo-tomentosis; pedunculis plerumque 3-6 aureo-stramineis 3-costatis contortis 

 plusminusve sericeo-pilosis, pilis patentibus saepe glanduliferis, denique gla- 

 bris; vaginis gracilibus densiuscule patenti-pilosis, pilis glanduliferis, laminis 

 lanceolatis pilosulis; capitulis hemisphaericis albis griseisque; bracteolis invo- 

 lucri paucis albidis griseisque obovatis rotundatis glabris; receptaculo longe 

 piloso. 



Acaulescent herb; leaves very densely rosulate, recurved, linear, 1.5-3 cm 

 long, 1.5-2 mm wide, subacute at the apex, more or less densely silky-pilose 

 with appressed antrorse hairs, very densely whitish- or cinereous-tomentose at 

 the base; peduncles usually 3-6 per plant, erect, golden-stramineous, 7-27 cm 

 long, 3-costate, twisted, more or less silky-pilose with rather spreading often 

 gland-tipped hairs or glabrous in age; sheaths slender, 1.5-3 cm long, rather 

 densely spreading-pilose with more or less gland-tipped hairs, obliquely split at 

 the apex, the blade erect., appressed, lanceolate, pilosulous; heads hemispheric, 

 white or grayish, 5-7 mm wide; involucral bractlets few, whitish or gray, thin- 

 textured, obovate, about 1.5 mm long, 1 mm wide, rounded at the apex, glabrous; 

 receptacle long-pilose; staminate florets pedicellate, the pedicels about 0.5 mm 

 long, long-pilose; sepals 3, subhyaline, separate, oblanceolate, about 1.7 mm 

 long, 0.5 mm wide, subacute, glabrous; petals 3, connate into a whitish tube 

 about 1.7 mm long; stamens 3, included; anthers white; pistillate florets sessile: 

 sepals 3, subhyaline, separate, lanceolate, about 2.2 mm long, 0.7 mm wide, 

 conduplicate, long-pilose on the back with scattered hairs which easily break 

 off; petals 3, glabrous, connate at base and apex into a hyaline tube to 2 mm 

 long; style brownish, about 0.5 mm long, glabrous, its branches 3, about 0.5 mm 

 long, borne at the same level as the 3 longer stigmas. 



TYPE: Bassett Maguire & D. B. Fanshawe 32539, savanna at 1100 m alt. on the 

 Xamarang River-'^enamu Trail, Pakaraima Mountains, British Guiana, November 

 11, 1951, New York Botanical Garden. 



Syngonanthus phelpsae var. pilosus Moldenke, var. nov. 



Haec varietas a forma typica speciei foliis dense adpresso-pilosis recedit. 



This variety differs from the typical form of the species in having the leaves 

 densely appressed-pilose with silvery hairs. 



TYPE: Bassett Maguire, John J . Wurdack, & George S. Bunting 37308 on the 

 west escarpment savanna 4-8 km south of Cumbre Camp, alt. of 1850-1900 m on 



