430 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[Vol. 9, No. 3 



nalibus late triangularibus acutiusculis, 0.5 mm longis, caudicibus sagittatis 

 liberis inaequilateralibus lanceolatis subacutis, 1.3-1.4 mm longis; stylo pallido 

 viridi, 43 mm longo papillato apice bifido extus scabridulo-papillato basi ab 

 corona carnosa parce undulata 0.6-0.8 mm longa subtento; achaeniis lineari- 

 turbinatis, 6-8 mm longis 2 mm latis, 10-costatis glabris; pappo stramineo- 

 rufescenti, 23 mm longo, 3-4-seriato, setis barbellatis. 



TYPE: open rocky places by savanna bordering escarpment below Summit 

 Camp above Middle Falls near Rio Tirica, Central Section, Chimanta Massif, 

 Bolivar, Venezuela, 1925 m alt., February 5, 1955 Julian A. Steyermark & John J. 

 Wurdack 511 (holotype NY, isotype F.). Paratypes: at edge of escarpment, 

 east-central portion of summit of Apacara-tepui, Chimanta Massif, 2450-2500. m 

 alt., June 21-22, 1953, Steyermark 75922; northwest cumbres, Churi-tepuf (Muru- 

 tepui), Chimanta Massif, 2300-2350 m alt., February 3, 1953, Wurdack 34312 pp. 



Chimantaea sect. Chiirantaea. 



Virgate, little-branched or sometimes moderately branched shrubs; heads 

 at the stem apex deeply immersed in the uppermost leaves, and a voluminous 

 copious tomentum; corolla-lobes conspicuously barbellate, the tuft of long hairs 

 often quickly deciduous. 



TYPE: Chimantaea mirabilis Maguire, Steyermark & Wurdack. 



3. Chimantaea lanocaulis Maguire, Steyermark, & Wurdack, sp. nov. 



Frutex 1.5-2.0-metralis, caule erecto ligneo, 2 cm diam., simplici solitario 

 infra denudato aliter apice conferte folioso, parte denudata plerumque glabra 

 parte foliosa densissime ochroleuco-luteo-lanosa; foliis caulis parte suprema 

 confertis alternis subsessilibus vel brevissime petiolatis, petiolis crassis 

 5-8 mm longis 5-7.5 mm. latis densissime ochroleuco-luteo-lanosis, laminis 

 patentibus coriaceis cuneato- vel rbomboideo-obovatis rotundatis vel subtruncatis 

 basi cuneatis, (4.5) 6-8 cm longis 3-5(7) cm latis, marginibus revolutis, pen- 

 ninerviis nervis lateralibus utroque latere 2-4 prominentibus supra sulcatis 

 subtus elevatis supra oliveo-viridibus glabris vel glabrescentibus supremis 

 juvenilibus irregulariter cinereo- vel ochroleuco-lanulos'is subtus densissime 

 ochroleuco-luteo-lanulosis; capitulis solitariis terminalibus sessilibus in foliis 

 supremis et copiosis tomentis insessis 60-100-floris homogamis maturis di- 

 stentis, 3-3.5 cm longis 5-5.5 cm latis, primum minoribus; involucro maturo 

 distento late campanulato 5-6-seriato, phyllariis indurato-subcoriaceis 75-85 

 exterioribus medianisque late lanceolatis obtusis vel acutis ad 15 mm longis 

 5-6 mm latis basi ipsa densissime fulvo-tomentosis supra medium fulvo-to- 

 mentosis marginibus dense ciliato-hirsutis aliter glabris, interioribus intimisque 

 lineari-lanceolatis acuminatis vel caudatis, 22-25 mm longis 2-2.5 mm latis, 

 extujf tomentosis basi ipsa excepta; receptaculo areolarum dense ferrugineo- 

 hirsutulo pilis erectis; paleis non visis; floribus actinomorphicis; corollis 22-25 

 mm longis, tubo prismatico-cylindrico, 8-9 mm longo 1.5 mm diam., extus glabro 

 intus fauce barbato-piloso, lobis fulvis erectis linearibus acutiusculis, 14-16 

 mm longis 0.75 mm latis, circa apicem rufo-barbatis; filamentis filiformibus in 

 orificio tubi affixis; antheris pallido brunneis, 6-8 mm longis, glabris, appendi- 

 cibus terminalibus triangulari-lanceolatis acutis, 1.0-1.5 mm longis, caudicibus 

 sagittatis liberis lineari-subulatis, 1.5 mm longis, glabris; stylo subulato longe 

 exserto, 3.1-3.8 cm longo, vinaceo, ramis subadpressis erectis, 0.7-1.0 mm 

 longis, glabris, basi ab corona carnosa 5-lobata 1.5 mm alta subtento; achaeniis 

 oblongo-turbinatis prismaticis, 7-8 mm longis, 10-costatis densissime fulvo- 

 hirsutulis pilis sursum directis; pappo rufescenti 2-3-seriato, setis ad 19 mm 

 longis, barbellatis, aristatis. 



