1961] 



BOTANY OF THE GUAYANA HIGHLANDS PART IV (2) 



17 



Sauvagesia elata Benth. subsp. occidentalis Maguire & YVurdack, subsp. nov. 



Coronae exteriores oblanceolatae ad apicem non incrassatae. Coronae in- 

 teriores parce minores 2.1—2.5 X 0.9 mm. 



VENEZUELA: Amazonas: Cerro Sipapo, mixed montane forest between Intermediate 

 Camp and summit, alt. 600-1500 m; 6 Feb 19-47, Maguire # Politi 28791 (holotype, NY). 



S. elata subsp. elata has very numerous apically clubbed exterior corona seg- 

 ments, the inner staminodia (2.8-) 3-3.7 mm long- and less than 1 mm wide; the 

 typical subspecies is limited to lowland British Guiana. In subsp. occidentalis, 

 the ± 15 outer segments are 0.2 mm wide and not at all thickened apically, 

 presenting a startling contrast to those of the eastern subspecies. 



Sauvagesia nudicaulis Maguire & YVurdack, sp. nov. 



S. imthurnicmae (Oliver) Dwyer distanter affinis, sed foliis maioribus inter- 

 nodiis distantibus stipulis mox deeiduis et maioribus pedunculis nudis vel rare 

 unibracteolatis. 



Suffrutex ramosus ad 6 dm. Stipulae valde caducae 5-8 X 2-4 mm margin- 

 ibus apicem versus serratis serratulis unisetosis setis ad 2 mm longis ; internodia 

 ca. 5 mm; lamina tenuiter coriacea 2-4 X 0.5-1 cm oblongo-ovata bis ovata apice 

 obtusa bis hebeti-acuta basi cuneata vix distincte (ad 2 mm) petiolata ad mar- 

 gines incrassata et serrulata dentibus appressis 1.5-3 mm inter se distantibus, 

 nervis lateralibus nnmerosis tenuibus supra vix argute prominnlis subtus 

 obscuris. Florcs ex axillis foliorum superiorum singulae ; pedunculus 1.5-2.5 cm 

 longus demum cernuus ebracteatus vol rare centraliter unibracteatus bractea 

 lineari 6 X 0.7 mm. Sepala 7.5 X 2 mm ovato-lanceolata apice acuta sed non 

 setosa. Petala 7.5-8 X 3 mm oblongo-obovata apice obtusa. Coronae exteriorae 

 desunt ; segmenta coronae interioris 5 oblauceolata 4.8 X 1-4 mm apice rotundata 

 intus basini versus valde carinata. Filamenta 0.5 mm longa; antherae 0.3 X 0.5 

 mm oblongae apice apiculatae. Stylus 3 X 0.15 mm; stigma punctiforme; 

 ovarii placentae parietales ; semina 0.9 X 0.6-0.65 mm dense alveolata. 



YENEZUELA: Amazonas: frequent in Savanna No. 3 at northwest base of Cerro Yapa- 

 cana, alt. 125 m; shrub 3-6 dm tall, flowers white; 20 Nov 1953; Maguire, WurdacTc 4' Bunting 

 36572 (holotype, NY) ; Yapacana savannas, Maguire, Cowan 4' WurdacTc 30541, Maguire 4' 

 WurdacTc 34560 (paratypes) ; Sabana El Yenado on Cano Pimichm, Rio Guainia, Maguire 4" 

 WurdacTc 35580 (paratype) ; Sabana Hechimoni on Cano Hechimoni, Rio Siapa, Maguire, 

 WurdacTc $ Bunting 37633 (paratype). 



COLOMBIA: Cacagual savanna, Rio Atabapo, Maguire, WurdacTc 4' Bunting 36283, 

 Maguire, WurdacTc 4' Keith 41456 (paratypes). 



S. imthurniana has leaves about 1 cm long, internodes only 1-3 mm apart, 

 stipules about 2 mm long and only apically lacerate with persistent bases, and 

 multibracteate peduncles. 



Sauvagesia imthurniana (Oliv.) Dwyer subsp. chimantensis Maguire, Steyer- 

 mark & TVurdaek, subsp. nov. 

 Folia elliptica bis vix oblongo-elliptica. 



VENEZUELA: Bolivar: frequent in upper northwest cumbre of Churi-tepui, (Muru-tepui) 

 2250-2300 m; shrub 0.2-0.5 m, flowers pink; 26 Jan 1953, WurdacTc 34201 (holotype, NY; 

 isotype, F) ; lower cumbre of Churi-tepui, WurdacTc 34169 (paratype); Cano Mojado, Torono- 

 tepui, Chimanta Massif, Steyermarl- 4' WurdacTc 991 (paratype) ; upper part of Auyan-tepui, 

 Vareschi 4- Foldats 4884, Tate 1130 (paratypes). 



Typical S. imthurniana, apparently limited to Mt. Roraima, has oblanceolate 

 or obovate-oblong leaf blades widest above the middle, while subsp. chimantensis 

 has leaves widest at or slightly below the middle. 



