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Article
Published: 2022-08-04

Zamia orinoquiensis (Zamiaceae, Cycadales), a new species from the western Orinoquía region of Colombia

Montgomery Botanical Center, 11901 Old Cutler Road, Coral Gables, FL 33156, U.S.A.; Sociedad Colombiana de Cycadas, Medellín, Antioquia, Colombia.
Instituto de Ciencias Naturales, Universidad Nacional de Colombia (sede Bogotá), Cra. 30 # 45-03, edificio 425. Bogotá, Colombia.
Global Biodiversity Conservancy 144/124 Moo 3, Soi Bua Thong, Bangsalae, Sattahip, Chonburi 20250, Thailand.
Sociedad Colombiana de Cycadas, Medellín, Antioquia, Colombia. Instituto de Biología, Universidad de Antioquia, Calle 67 #53-108, Medellín, Antioquia, Colombia.
Sociedad Colombiana de Cycadas, Medellín, Antioquia, Colombia. Instituto de Biología, Universidad de Antioquia, Calle 67 #53-108, Medellín, Antioquia, Colombia.
Instituto de Ciencias Naturales, Universidad Nacional de Colombia (sede Bogotá), Cra. 30 # 45-03, edificio 425. Bogotá, Colombia.
Doctorado en Biodiversidad,UNELLEZ, Herbario PORT, Mesa de Cavacas, Guanare, estado Portuguesa, Venezuela.
Doctorado en Biodiversidad,UNELLEZ, Herbario PORT, Mesa de Cavacas, Guanare, estado Portuguesa, Venezuela.
Llanos Orientales Orinoquía Colombian Cordillera Oriental Gymnosperms

Abstract

Zamia orinoquiensis Calonje, Betancur & A.Lindstr., a new species from the western Orinoquía region of Colombia is described and illustrated. The species is segregated from and compared to Z. muricata Willd., the latter which is morphologically recharacterized, illustrated, and recircumscribed to include populations from tropical dry forest and tropical moist forests in the Lara-Falcón Formation and the Cordillera de la Costa natural regions of Venezuela, as well as the Serranía de Macuira in La Guajira, Colombia. Zamia orinoquiensis is morphologically distinguished from Z. muricata by its leaves bearing fewer, coriaceous (vs. papyraceous) leaflets, eophylls with 2 (vs. 4) leaflets, pollen strobili that are brown to reddish brown (vs. cream to tan) with larger microsporophylls bearing more numerous microsporangia, and ovulate strobili that are dark brown to black (vs. dark olive green to olive brown) at maturity.

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