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A new endemic species of Amyris (Rutaceae) from the Magdalena River Valley in Colombia

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Abstract

Amyris pacis, a new species from the Magdalena River Valley in Colombia, is described and illustrated, including comments about its geographical distribution, habitat, phenology, conservation status and taxonomic affinities. The new species appears to be closely related to A. trimera due to its unifoliolate leaves and trimerous flowers, but differs from it by its longer leaflet blades with the base rounded to subtruncate, or occasionally subcordate (vs. cuneate), and secondary veins slightly ascending (vs. more strongly ascending). Being a threatened and endemic species, and one of the few species with trimerous flowers, it should be included in further studies to determine appropriate conservation plans and to improve knowledge about the morphology of species with trimerous flowers in Neotropical Rutaceae.

Resumen

Amyris pacis, una nueva especie proveniente del valle del río Magdalena en Colombia, es descrita e ilustrada, incluyendo comentarios sobre su distribución geográfica, hábitat, fenología, estado de conservación y afinidades taxonómicas. La nueva especie parece estar estrechamente relacionada con Amyris trimera por la presencia de hojas unifolioladas y flores trímeras, pero se diferencia de ella por sus láminas foliolares más largas con la base redondeada a casi truncada, o en ocasiones ligeramente cordada (vs. cuneada), y venas secundarias ligeramente ascendentes (vs. más fuertemente ascendentes). Debido a que es una especie endémica y amenazada, y una de las pocas con flores trímeras, sería interesante incluirla en estudios posteriores para determinar planes de conservación adecuados y mejorar el conocimiento sobre la morfología de especies con flores trímeras en las Rutaceae Neotropicales.

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Acknowledgments

We thank the staff of herbaria COL, HUA, JAUM, MO, and UDBC for allowing our study of their specimens; Ana C. Pareja (HUA) for the illustration; Diego Zapata (UDBC), Heriberto David (HUA) and Juan Pablo Tobón (JAUM) for supplying information; Carlos Reynel (MOL) and one anonymous reviewer for his careful review of the manuscript and suggestions that improved it.

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Authors and Affiliations

  1. Herbario Universidad de Antioquia (HUA) y Grupo de Estudios Botánicos (GEOBOTA), Instituto de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, A.A. 1226, Medellín, Colombia

    Yeison Londoño-Echeverri & Ana M. Trujillo-López

  2. Semillero en estudios taxonómicos de plantas de Colombia – Herbario MEDEL, Universidad Nacional de Colombia, A.A. 3840, Medellín, Colombia

    Yeison Londoño-Echeverri & Ana M. Trujillo-López

  3. Missouri Botanical Garden, 4344 Shaw Blvd., St. Louis, Missouri, 63110, USA

    Roy E. Gereau

Authors
  1. Yeison Londoño-Echeverri
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  2. Ana M. Trujillo-López
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  3. Roy E. Gereau
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Correspondence to Yeison Londoño-Echeverri.

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Londoño-Echeverri, Y., Trujillo-López, A.M. & Gereau, R.E. A new endemic species of Amyris (Rutaceae) from the Magdalena River Valley in Colombia. Brittonia 74, 272–279 (2022). https://doi.org/10.1007/s12228-022-09714-y

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