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. 2025 May 5:256:21-35.
doi: 10.3897/phytokeys.256.147923. eCollection 2025.

 Ormosianeillii (Fabaceae), a remarkable new tree species from the Cordillera del Cóndor plateaus in Ecuador

Juan Ernesto Guevara-Andino  1 , John L Clark  2 , Daniel Navas-Muñoz  3
Affiliations

 Ormosianeillii (Fabaceae), a remarkable new tree species from the Cordillera del Cóndor plateaus in Ecuador

Juan Ernesto Guevara-Andino et al. PhytoKeys. .

Abstract

A new species, Ormosianeillii (Fabaceae), is described and illustrated from the tepui-like formations of the Cordillera del Cóndor Region in south-eastern Ecuador. Morphological similarities with other species of Ormosia are examined and discussed. Based on IUCN guidelines, a preliminary conservation status of Endangered (EN) is recommended.

Keywords: Endemism; Fabaceae; Papilionoideae; tepui-like formation; white sands.

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Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Figure 1.
Figure 1.
Illustration of Ormosianeillii J.L. Clark & J.E. Guevara A lateral view of flower B front view of corolla C fruit D immature flower E branch with mature fruits and flowers. Illustration by Efrén Merino-Santi.
Figure 2.
Figure 2.
Ormosianeillii J.L. Clark & J.E. Guevara A habit B habitat C inner bark D outer bark. Photos by J.E. Guevara.
Figure 3.
Figure 3.
Ormosianeillii J.L. Clark & J.E. Guevara A–D flowers featuring remarkable dark purple to black corolla E flowering branch. Photos by John L. Clark of the type (J.L. Clark & D.A. Neill 15775).
Figure 4.
Figure 4.
Ormosianeillii J.L. Clark & J.E. Guevara A–C details of the adaxial and abaxial surface of leaflets D fruiting branches with mature fruits E–F mature fruits showing details of sutures and cuspidate apex in the dehiscent fruit A, B from J.E. Guevara et al. 6791 (QCNE, F) C from J.L. Clark et. al. 16085D from D.A. Neill et al. 17047E–F from J.E. Guevara et al. 6790. Photos A, B, E, F by J.E. Guevara C, D by J.L. Clark.
Figure 5.
Figure 5.
Conservation assessment for Ormosianeillii J.L. Clark & J.E. Guevara. The left panel shows the Extent of Occurrence (EOO) of Ormosianeillii, illustrating the current effects of deforestation across its known geographic range. The bottom right panel displays the Area of Occupancy (AOO) for O.neillii.
Figure 6.
Figure 6.
A Map of the geographic distribution of Ormosianeillii J.L. Clark & J.E. Guevara (red dots) and its morphologically most similar species B Cordillera del Cóndor landscape where O.neillii is frequent in the white sand dwarf forests on tepui-like formations. Photo by J. E. Guevara.
See this image and copyright information in PMC

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