1957] 



BOTANY OF THE CHIMANTA MASSIF— I 



429 



4. Leaves broadly spathulate or cuneate, 3—4 cm broad, 6-7 cm long; stems 



remaining densely woolly-tomentose. 3. Chimantaea lanocaulis. 



4. Leaves narrow, not exceeding 2 cm broad. 

 5. Leaves oblanceolate, 1.2—2.0 cm broad. 

 6. Heads almost completely immersed in woolly pubescence; phyllaries 



glabrous, merely hispidulous at the summit. 4. Chimantaea eriocephala. 



6. Heads immersed in woolly pubescence only at the base; phyllaries 



densely red-tawny tomentose on the back. 5. Chimantaea rupicola. 



5. Leaves narrowly elliptic-linear, 5-8 mm broad. 6. Chimantaea humilis. 



3. Achenes and receptacle glabrous; old leaves strongly reflexed and marcescent 

 on the stem. 



7. Leaves narrowly linear, base of the upper leaves immersed in very copious 



and voluminous arachnoid tomentum. 7. Chimantaea mirahilis. 



7. Leaves oblanceolate, base of the upper leaves imbedded in a compact 



subpannose tomentum. 8. Chimantaea espeletoidea. 



Chimantaea sect. Cinerea Maguire, Steyermark & Wurdack, sect. nov. 



Stenopadus subg. Eriostenopadus Blake, Brittonia 3' 201. 1939, as to type. 



Frutex depressa; capitulis non in foliis supremis et copiosis tomentosis 

 insessis; lobis corollarum tenue pilosis non-barbellatis. 



Typus: Chimantaea cinerea (Gl. & Blake) Maguire, Steyermark & Wurdack. 



1. Chimantaea cinerea (Gl. & Blake) Maguire, Steyermark & Wurdack, comb. nov. 

 Stenopadus cinereus Gleason & Blake, Brittonia 3l 200. 1939. 



TYPE: Tate 1111, Auyan-tepui', Gran Sabana, Venezuela, at 2200m alt. (NY). 



Distribution. Known only from Auyan-tepui, and besides the type only by 

 Cardona 2711. Reported by Cardona as a shrub to 3 m high with a resinous trunk, 

 common on the cumbre at 2100-2500 m alt. 



2o Chimantaea similis Maguire, Steyermark, & Wurdack, sp. nov. 



Frutex vel arbor 2-5-metralis, ramis divaricatis paucibus teretibus juveni- 

 libus, 1-1.5 cm diam.; foliis alternis apice ramorum confertis petiolatis, petiolis 

 incrassatis vel alatis tomentosis, 2-4 (15)mm longis 5-8 mm latis vel laminis 

 sessilibus, laminis coriaceis obovatis vel oblongo-obovatis apice rotundatis, 

 5.5-10 (15) cm longis (1.5) 2.5-6.0 (8.0) cm latis, revolutis supra glabris vel 

 subglabris (costa tomentulosa excepta) subtus densissime cinereo-ochroleuco- 

 pannoso-tomentosis penninerviis nervis lateralibus utroque latere 6-10 jugis 

 subtus laminis vetustioribus prominulis laminis juvenilibus ficte nullis, costa 

 media supra subsulcata subtus elevata; capitulis solitariis terminalibus ses- 

 silibus 25-30-floris homogamis; involucro late campanulato 10-12-seriato, 3.5- 

 4.0 cm longo 1.2-1.5 cm lato, phyllariis indurato-chartaceis exterioribus 6-7- 

 seriatis arete gradatis anguste ovatis vel lanceolatis acuminatis, 7-16 mm 

 longis 2-2.5 mm latis, supra media cinereo-tomentosis, interioribus 3-5-seriatis 

 fulvis subito longioribus ante maturitatem erectis eis maturis laxe recurvatis 

 linearibus vel subulato-setaceis cuspidato-acuminatis, 28-30 mm longis 1.25-1.5 

 mm latis, apice hispidulis extus dense papilloso-scabridulosis remote denticulato- 

 ciliolatis; receptaculo 4-5 mm diam., alveolato alveolis cinereo-pilosulis margi- 

 nibus alveolarum glabris; paleis 1-2 deciduis marginalibus chartaceis setaceo- 

 subulatis, 29-30 mm longis 0.5-0.75 mm latis, apice extusque scabridulis vel 

 hispidulis intus glabris; floribus actinomorphicis stramineo-viridibus, 22-25 mm 

 longis, tubo prismatico-cylindrico, 6-8 longo 2 mm diam. extus glabro intus 

 fauce pilis albis hirsutulo-barbato (in statu sico ficte pilis patentibus in speciem 

 extus tantum intus unde), lobis 5 erectis linearibus apice subobtusis incrassato- 

 cucullatis glabris, 16-18 mm longis 0,7-0.8 mm latis; filamentis filiformibus in 

 orificio tubi affixis; antheris linearibus, 10.5-11 mm longis, appendicibus termi- 



