426 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN JVo/. 9, No. 3 



Mikania florida Aristeguieta, sp. nov. 



Frutex volubilis; caule tereti juventate puberulo tardius glabrato; foliis 

 oppositis petiolatis lanceolato-oblongis apice subacutis basi rotundatis vel 

 subobtusis, 4-6 cm longis, 1.8-3 cm latis, utrinque glabris integris chartaceo- 

 membranaceis subtrinervatis; petiolo 8-12 mm longo glabro; paniculis terminalibus 

 et lateralibus; capitulis ca. 8 mm altis; pedicellis 2-7 mm longis; bracteolis 

 lanceolatis 4 mm longis; involucri squamis lanceolatis apice acutis, 6-7 mm 

 longis dorso puberulis vel glabris; corollis 4.2 mm longis, glabris; tubo proprio 

 2 mm longo; dentibus limbi 0.7 mm longis; achaeniis 4 mm longis sparse puberulis 

 vel glabris dense glandulosis; pappi setis albis 4 mm longis. 



TYPE: woody vine in low trees, flowers white, upper northwest cumbre of 

 Churi-tepui (Muru-tepuf), alt. 2250-2300 m, Edo. Bolivar, Venezuela, Jan. 26, 

 1953, John J. Wurdack 34226. (NY). 



This species is related to M. lucida Blake, from which it can easily be dif- 

 ferentiated by its larger heads, pedicels, and involucre. 



Verbesina angusta Maguire, Steyermark & Wurdack, sp. nov. 



Frutex 1-2-metralis simplex vel superne parce ramosus, caule atropurpureo 

 vetustiore glabro tereti superne 5-8 mm diam., ramis superne primum hirtellis 

 demum glabratis exalatis; foliis alternis erectis subtus pallido-viridibus petio- 

 latis, petiolis 2-5 (-10) mm longis 2-3 mm latis, hirtellis vel glabrescentibus, 

 laminis firmiter membranaceis oblanceolatis hebeti-acutis vel apiculatis basi 

 cuneatis, 3-10 cm longis 0.7-2 cm latis crenulato-serrulatis (dentibus inter se 

 3-9 mm distantibus), supra in nervo mediano sparse strigosis alioqui glabris, 

 subtus primum scaberulo-strigosis demum glabratis, penninerviis nervis lateralibus 

 utroque 4-8 arcuato-adscendentibus 1-3 mm ante marginem anastomosantibus 

 subtus prominulis; inflorescentia 4.5-9 cm elongata, corymbiformi-paniculata; 

 paniculis terminalibus 3-8-capitulis; pedunculis atropurpureis gracilibus, 1.5-6 

 cm longis 0.5-1.5 mm latis, dense hirtellis; capitulis radiatis, disco 1-1.5 cm 

 alto 1-1.5 cm lato; receptaculo late subhemisphaerico, 2.5 mm alto 4.5 mm diam.; 

 involucro 2-3-seriato gradato, bracteis oblongis vel oblanceolato-oblongis ro- 

 tundatis vel late obtusis, extimis 2 mm longis 1.2 mm latis, reliquis 4-5.5 (—8) 

 mm longis 1-2 mm latis, extus basi marginibus sparse vel modice hirsutulis; radiis 

 7-13, aureis, laminis subelliptico-oblongis apice retusis tridentatis, 8.5-1 1 mm 

 longis 3.7-4 mm latis, plerumque glabris nervis principalibus duobus nervis 

 secundariis 7, tubo 1-1.7 mm longo 0.6-1 mm lato extus puberulo; corollis disci 

 39-45 luteis subcylindricis, 4.2—7 mm longis, quinquelobatis, lobis ovatis suba- 

 cutis, 1-1.5 mm longis 0.75 mm latis, marginibus incrassatis hirtello-papillatis, 

 tubo^ 3.2-5.5 mm longo basi infra mediumque 0.6-1 mm lato, supra medium 1-1.5 

 mm lato, infra medium hirsutulo aliter glabro; paleis fere complicatis late oblanceo- 

 latis vel spathulato-obovatis carinatis retusis rotundatis vel obtusis, 6-6.7 mm 

 longis 1.8-2.5 mm latis, extus parce substrigosis, carina marginibusque modice 

 vel dense hirtellis, leviter 4-striatis; filamentis ligulatis 1.2 mm longis 0.2 mm 

 latis; antheris brunneis, 2.75-3.2 mm longis, sagittatis, appendicibus terminalibus 

 ovato-oblongis obtusis 0.4 mm longis, caudicibus tenuibus rectis liberis, 0.2-0.3 

 mm longis; stylo 5 mm longo, bifido, ramis 1.8-2.2 mm longis, recurvatis ligulatis, 

 appendice stigmatica ovata acuta extus dense pilosula; achaeniis brunneo-nigre- 

 scentibus compressis late- oblongis vel obovatis, 3-4.8 mm longis 1.3-3 mm latis, 

 prominenter alatis superficie parce strigillosa uno latere valde 1-costato, alis 

 0.3-0.6 mm latis, marginibus hispidulis supra medium praesertim eis achaeniorum 

 disci basi angustatis latitudine achaeniorum radiorum extremorumque subaequali- 

 bus; aristis 2, inaequalibus minutissime setulosis, 2.5-3.2 mm longis. 



