2957] 



BOTANY OF THE CHIMANTA MASSIF— I 



431 



TYPE: east-central portion of summit of Apacara-tepui, Chimanta Massif, 

 Bolivar, Venezuela, 2450-2500 m alt., June 21-22, 1953, Julian A. Steyermark 

 75912 (holotype F, isotype NY). 



4. Chimantaea eriocephala Maguire, Steyermark & Wurdack, sp. nov. 



Frutex depressus 0.2-0.5-metralis, caulibus simplicibus vel parce ramosis 

 ligneis infra denudatis, ad 1.5-2.0 cm diam., apice conferte foliosis ferrugineo- 

 lanulosis; foliis apice confertis alternis breviter subito petiolatis, petiolis 

 7-10 mm longis 2-3 mm latis, densissime fulvo-lanulosis pilis ad 2 cm longis, 

 larainis coriaceis patentibus vel adscendentibus oblanceolatis rotundatis, 2,5- 

 4.5 cm longis 1.0-1.8 cm latis, valde revolutis supra oliveo- vel fulvo-viridibus 

 glabris sulcatis obscure nervatis subtus densissime fulvo-pannosis nervis latera- 

 libus prominulis utroque latere 1-3, costa media subtus elevata; capitulis 

 solitariis terminalibus sessilibus in foliis supremis et copiosis tomentis inses- 

 sis 20-25-floris homogamis ad 3 cm latis; involucri phyllariis anguste lanceolatis 

 acuminatis, ca. 23 mm longis 1.8 mm latis, extus per medium parce leviter stri- 

 gosis intus glabris apice utrinque hispidulo excepto; floribus actinomorphicis; 

 corollae tubo paullo prismatico-cylindrico, 5-6 mm longo 1.5 mm diam. extus, 

 glabro intus fauce piloso lobis stramineis erectis linearibus acutis, 15-16 mm 

 longis 0.5 mm latis, parce longiciliatis pilis 2-3 mm longis circa apicem barbatis 

 pilis palidis; filamentis filiformibus in orificio tubi affixis; antheris non visis; 

 stylo subulato basi ad corona carnosa 5-lobato 1 mm alta subtento; achaeniis 

 cylindrico-turbinatis, 5.5-6.0 mm longis 2 mm latis, densissime stramineo-hirsu- 

 tulis pilis sursum directis; pappo stramineo ca. 2-3-seriato, setis ad 20 mm 

 longis 0.1-0.2 mm latis barbellatis, aristatis. 



TYPE: upper cumbre and deep canos, northwest cumbres, Churi-tepuf (Muru- 

 tepui), Chimanta Massif, Bolivar, Venezuela, 2250-2300 m alt., January 26, 

 1953, John J. Wurdack 34225 (NY). 



5. Chimantaea rupicola Maguire, Steyermark & Wurdack, sp. nov. 



Frutex depressus ramiferus 0.1-0.3-metralis, caulibus ramisque irregulariter 

 curvatis ligneis rugosis, ad 4 cm diam., infra denudatis apice conferte foliosis, 

 ferrugineo- vel pallido-brunneo-pannosis vel vetustioribus glabris; foliis apice 

 confertis sessilibus alternis coriaceis patentibus vel adscendentibus oblanceo- 

 latis obtusis vel rotundatis, 3-6 cm longis 0.6-1.5 cm latis, valde revolutis supra 

 oliveo-viridibus penninerviis nervis lateralibus utroque latere 2-4 glabris vel 

 supremis juvenilibus cinereo-pannosis subtus vetustioribus densissime cinereo- 

 pannoso-tomentosis juvenilibus ferrugineo-pannoso-tomentosis; capitulis solitariis 

 terminalibus sessilibus in foliis et copiosis tomentis supremis insessis homo- 

 gamis, primum 2-2.5 cm longis 1-1.3 cm latis, maturis distentis ad 2.8 cm longis 

 ad 3.5 cm latis; involucro oblongo-campanulato ca. 8-seriato, phyllariis 50-55 

 indurato-chartaceis extus supra medium densissime ferrugineo-tomentosis intus 

 glabris exterioribus medianisque lanceolatis acutis, 6-12 mm longis 2-3 mm latis, 

 interioribus 18-22 mm longis 1.5-2 mm. latis; receptaculo piano vel plano-con- 

 vexo ca. 2.5 mm diam. valde alveolato marginibus areolarum ferrugineo-hirsutulis; 

 paleis 1-2 deciduis marginalibus submembranaceis setaceo-subulatis, ad 25 mm 

 longis 0.2 mm latis, marginibus parce barbellato-hispidulis extus supra medium 

 ferrugineo-pilosis; floribus 12-24 actinomorphicis; tubo paullo prismatico-cylin- 

 drico, 6 mm longo 2 mm diam., extus glabro intus fauce piloso; lobis luteis erectis 

 linearibus obtusis marginibus incrassatis, 12-16 mm longis 0.5-0.8 mm latis, 

 parce longiciliatis extus circa apicem rufo-barbatis; filamentis filiformibus in 

 orificio tubi affixis; antheris ochroleucis linearibus, 5.5-6.5 mm longis, glabris, 

 appendicibus terminalibus lanceolatis acutis, 1.2 mm longis, caudicibus sagit- 



