438 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [Vol. 9, No. 3 



hemisphaerico, parvo, valde hirsuto, nonalveolato; corollis parvis submerabra- 

 naceis bilabiatis, tubo cylindrico 5-nervato, limbo longiore, campanulato, lobo 

 posteriore 4-nervato, minute tridentato, lobo anteriore profunde bifido, segmentis 

 linearibus circinnatis 2-nervatis; antheris caudatis, appendicibus apicalibus 

 acutiusculis, appendicibus caudalibus linearibus, integris, liberis; granis pollini 

 luteis, tricolporatis, sulcis longiacutis; granis sphaeroideis, spinulosis, axibus 

 polaribus ca. 52 \).\ achaeniis cylindrico-fusiformibus, aliquantulum 10 (12)- 

 costatis; annulis prominentibus, corona perbrevi, minute 5-lobata, collare pappi- 

 fero non evidenti, pappo pluriseriato (5) tortili, setis filiformibus minute barbel- 

 latis; stylo filiformi laevi; ramis adscendentibus vix exsertis, dorso unilobatis, 

 partibus stigmatibus projectis minutissimis. 



Frutex parvus; trunculo brevi, ramis non ramosis; foliis alternis sessilibus 

 confertis coriaceis, penninerviis reticulatis, ellipticis vel elliptico-oblanceo- 

 latis. 



Genus monotypicum. 



TYPUS: Achnopogon virgatus Maguire, Steyermark & Wurdack. 

 Achne {"oyyr\) y chaff; pogon (TtfoytoV ) , beard. 



Achnopogon virgatus Maguire, Steyermark & Wurdack, sp. nov. 



Frutex 0.3-0.6-metralis, caule principali cinereo erecto, 2-12 cm longo 7-12 

 mm diam., apice cinereo-tomentello aliter glabro, ramis lateralibus simplicibus 

 vel interdum ramosis arcuato-adscendentibus gracilibus, 2-3 mm diam. basi ad 5 

 mm diam. 2-6 dm altis, cano-pubescentibus vel glabrescentibus; foliis coriaceis 

 apice caulis principalibus vel caulium lateralium brevium rosulato-confertis 

 sessilibus vel breviter petiolatis, laminis subtus pallido-viridibus anguste 

 elliptico-lanceolatis vel oblanceolatis acutiusculis apiculatis vel obtusis, 2-6 

 cm longis 6-12 mm latis, subtus leviter penninerviis nervis lateralibus utroque 

 latere plerumque 10-12 valde reticulato-venosis supra nervis obscuris vel nullis, 

 irregulariter pilosis vel glabrescentibus, costa media prominenti, supra canali- 

 culata subtus prominenti, marginibus valde nervatis, foliis caulium floriferum 

 lateralium erecto-adscendentibus alternis plerumque breviter petiolatis, petiolis 



3- 5 mm longis 1.5-2 mm latis, laminis oblongo-lanceolatis vel elliptico-oblongis 

 acutis vel acuminatis apiculatis, 1.5-2.5 cm longis 4-9 mm latis, subtus leviter 

 penninerviis nervis lateralibus utroque latere 4-7 valde reticulato-venosis supra 

 nervis obscuris vel nullis dense vel parce pilosis; inflorescentiis lateralibus in 

 axillis foliorum superiorum in cymis dispositis breviter pedunculatis; capitulis 

 2-3 in cyma, campanulato-cylindricis, 10-15 mm longis 4-5 mm latis, homogamis 



4- 6-floris; phyllariis 15-20, firme chartaceis vel apice subcoriaceis ca 5- 

 seriatis aequaliter gradatis adpressis, 5-9-striatis, extremis ovatis vel lanceo- 

 latis acutis, 3-5 mm longis 0.8-1.6 mm latis, extus omnino cano-hirtellis intus 

 glabris, medianis oblanceolatis vel obovatis acutis, 6-7 mm longis 2-3 mm latis, 

 extus apice et parte suprema cano-barbatis pilis erectis infra medium intusque 

 glabris, intimis supremisque oblanceolatis acutis, 9-10.5 mm longis 1.5-2.0 mm 

 latis; receptaculo hemisphaerico, 0.6-0.9 mm diam., apice hirsutis pilis erectis 

 2-4 mm longis; corollis bilabiatis, 8.0-8.5 mm longis, tubo cylindrico, 3-3-5 mm 

 longo 0.4-1.5 mm diam., extus supra basim minute puberulo, limbo 5 mm longo, 

 lobo posteriore (exteriore) intus albido 'extus albido-lilacino apice purpureo, 4-5 

 mm longo, 3-dentato lobis ovatis obtusis 0.2-0.3 mm longis, lobo anteriore 

 (interiore) 2-partito, lobis albidis ligulatis acutiusculis valde revolutis, 3-4 mm 

 longis 0.5-0.6 mm latis; filamentis ca. 0.5 mm longis, in orificio tubi affixis; 

 antheris vinaceis, 3.75-4.0 mm longis, appendicibus terminalibus ovatis suba- 

 cutis, 0.5-0.6 mm longis, caudicibus simplicibus non sagittatis linearibus suba- 



