Resumo

GONZALEZ, Favio  e  SANCHEZ, Luis Roberto. Zinowiewia sebastianii (Celastraceae), a new high-Andean species from the Colombian Eastern Cordillera. Caldasia [online]. 2017, vol.39, n.2, pp.260-268. ISSN 0366-5232.  https://doi.org/10.15446/caldasia.v39n2.67316.

Zinowiewia sebastianii, a new species from high-Andean forests of the Eastern Cordillera at the department of Boyacá (Colombia) is described and illustrated, and its taxonomic affinities are discussed. Individuals of the new species are shrubs to 5 m tall, with interpetiolar, laciniate stipules, leaf blades with 8-11 pairs of lateral veins and entire, plane margin, 2-forked dichasia to 1 x 1 cm, axillary to the distal leaves, calyx, corolla and androecium pentamerous or tetramerous, and two-celled, one-seeded samaras 18-20 x 5-7 mm. Based on the low number of individuals of Z. sebastianii observed within an area of occupancy < 10 km2, in severely fragmented forests, the species is proposed as Critically Endangered (CR), as it faces an extremely high risk of extinction in the wild.

Palavras-chave : Angiosperms; Critically endangered (CR) species; flora of Boyacá; flora of Colombia; Iguaque Flora and Fauna Sanctuary; neotropical plants.

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