Monographs Details: Stenopadus carbonae Maguire & Lasser
Authority: Maguire, Bassett, et al. 1953. The Botany of the Guayana Highland. Mem. New York Bot. Gard. 8 (2): 87-160.
Family:Asteraceae
Description:Latin Diagnosis - Arbor parva; ramis teretibus crassis glabris; foliis chartaceo-subcoriaceis oblanceolatis glabris, laminis (10) 15-17 cm. longis 3.5-6.5 cm. latis, costa prominenti supra subtusque nervis lateralibus prominentibus, in nervo collectivo 4-8 mm. ab margine remoto, venulis prominenter reticulatis, apice rotundato vel obtuso aliquando brevissimo acuminato, basi anguste acuminata; petiolis 15-25 mm. longis, foliis sursum brevioribus; inflorescentia terminali 1-4-capitata, involucro 3-4 cm. longo valde pyriformi, basi conico-stipitata, bracteis valde gradatis, crasse appresso-rufo-venniformi-hirsutis, inferioribus 5 mm. longis ovatis induratis obtuse crasso-apiculatis, superioribus lanceolatis ca. 2 cm. longis 6 mm. latis acutis ciliatis, supremis transitis in paleas anguste lanceolatis 3 cm. longis tenuiter subinduratis; floribus 20-25, tubo hypocrateriformi ca. 20 mm. longo glabro quinquelobato, lobis subaequalibus anguste linearibus ca. 15 mm. longis acutis, basi ca. 1 mm. lata; filamentis ca. 5-6 mm. longis, antheris connatis 10-12 mm. longis, appendicum apicibus ca. 2.5 mm. longis, appendicibus caudatis antherarum adjacentium connatis acutis 4.0-4.5 mm. longis; receptaculo piano glabro paleifero, paleis 3-4 deciduis ca. 3 cm. longis 0.5 mm. latis uno saepe persistenti sparse strigosis prope apicem brevissimohirsutulis; pappo 18-20 mm. longo sordido, setis 3-5-seriatis prope apicem minute hirsutulis maturis valde reflexis; achaeniis prismaticis 8-10 mm. longis 1.5-2.0 mm. latis acutis 5-angulatis glabris nigrescentibus.

Discussion:

TYPE: en arenizcas y lugares abiertos, Cerro Arepuchi, 600-700 m. alt., Rio Caronf, Bolivar, Venezuela, Abril 1045, Felix Cardona 1181; New York- Botanical Garden; isotype, National Herbarium, Venezuela, Caracas. Faratype: arbol 15 m. alto, alrededor del campamento Perai-tepui, 900 m. alt., Rio Caroni, Marzo 17, 1947, F. Cardona 2095.

Stenopadus cardonae is most closely to be associated with S. talaumifolius Blake of Cerro Duida, which has obovate leaves chiefly about 8 cm. long and 4-5 cm. broad,densely strigose branchlets, and much narrower and smaller heads. S. cardonae is sharply distinctive because of the + 20 cm. long peduncle-like terminal axis which tends to become naked by the early loss of the upper reduced leaves.