Monographs Details: Stenopadus affinis Maguire, Steyerm. & Wurdack
Authority: Maguire, Bassett, et al. 1957. Botany of the Chimanta Massif - I Gran Sabana, Venezuela. Mem. New York Bot. Gard. 9 (3): 393-484.
Family:Asteraceae
Description:Latin Diagnosis - Arbor 10-12-metralis, ramis teretibus griseis juvenilibus parce strigosis vetustioribus glabris; foliis alternis petiolatis, petiolis 4-15(-35) mm longis 2-2.5 mm latis, parce strigillosis demum glabris, laminis patentibus chartaceocoriaceis supra atroviridibus nitidis subtus pallido-viridibus elliptico-ovatis vel obovatis acutis vel obtusiusculis, 5-15 (-20) cm longis 2.5-6.5 cm latis, penninerviis utrinque prominenter reticulato-venosis, nervis lateralibus utroque latere 8-10 costa media subtus elevata, plerumque glabris, foliorum juvenilium costa media supra parce puberula excepta; capitulis solitariis terminalibus sessilibus homogamis 10-21-floris; involucro pyriformi basi angustato, 4-4.5 cm longo 1.5-2 cm lato, ca. 10-seriato, phyllariis valde gradatis adpressis extus fulvo-strigillosis, inferioribus coriaceis late ovatis obtusis vel acutiusculis, 10-13 mm longis 8-9 mm latis, superioribus oblongo- vel late lanceolatis acutiusculis vel acutis, 17-21 mm longis 5-7 mm latis, supremis linearibus vel lineari-lanceolatis, 25-30 mm longis 2-3 mm latis; receptaculo piano alveolato glabro, 5-6 mm diam. paleifero, paleis 3-4, chartaceis deciduis subulato-setaceis, 32-35 mm longis 1 mm latis, extus marginibusque hirsutulis; floribus 19-21 actinomorphicis albidis; corollis 32 mm longis glabris, tubo hypocrateriformi, 20-22 mm longo basi 1.5 mm lato apice 2.5 mm lato, quinquelobato, lobis subaequalibus anguste linearibus, 13-15 mm longis 1 mm latis, acuminatis valde revolutis apice marginibusque incrassatis; filamentis in sinibus affix is, 5-6 mm longis, antheris 11-11.5 mm longis, appendicibus terminalibus triangularibus acutiusculis 1 mm longis, caudicibus sagittatis, 2.5 mm longis, lineari-lanceolatis falcato-acuminatis remote retrorso-serrulatis; pappo 18-20 mm longo, sordido, setis 5-6-seriatis longioribus apice dilatatis hispidulis; achaeniis nigris linearicylindricis prismaticis 5-7-angulatis, 11 mm longis 2 mm latis, glabris.

Discussion:

TYPE: common on forested west-facing slopes with sandstone boulders, between camp 2 and camp 3, northwestern part of Abacapa-tepuf, Chimanta-Massif, Bolivar, Venezuela, 850-1100 m alt., April 18, 1953, Julian A. Steyermark 75110 (holotype F; isotype NY). Paratype: along southwest-facing sandstone bluffs of Chimanta-tepui (Torono-tepuf), near southern corner, Chimanta Massif, 1700 m alt., May 19-20, 1953, Steyermark 75479.