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| Vochysia wilsonii Marc.-Berti, J.M. Vélez. & Aymard, in Marcano-Berti, Vélez-Puerta et Aymard-Corredor, 2023. |
Abstract
A new species of Vochysia, V. wilsonii (section Ciliantha, subsection Ferruginea), is described, and its morphological
relationships with other similar Vochysia species are discussed. Vochysia wilsonii is found in wet forests over sandstone tabletop
outcrops (“Mesetas”) and white sand soils in the Araracuara (“medio río Caquetá”) and Chiribiquete areas, a megadiverse region in
the Colombian Guayana Shield, Caquetá department. This new species is a tree up to 25 m tall, and shares features with four species
(Vochysia biloba, V. casiquiarensis, V. sabatieri, and V. vismiifolia). However, it differs in the size and shape of the leaves, stipules,
inflorescence, cincinni, spur, spurred sepal, flower, central petal and stamen, as well as in its pubescence size and shape. An updated key
of 45 Colombian species of Vochysia is provided.
Keywords: Wet forest, Sandstone outcrops, Araracuara, Medio Río Caquetá, Vochysia, Vochysiaceae
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| Holotype of Vochysia wilsonii Marc.-Berti, J.M. Vélez & Aymard (Duivenvoorden, Matapí & Restrepo 2723, COAH [4950]). |
Vochysia wilsonii Marc.-Berti, J.M. Vélez. & Aymard, sp.
nov.
Vochysia wilsonii resembles V. biloba, V. casiquiarensis,
V. sabatieri and V. vismiifolia, but can be differentiated
from these species by having leaves obovate to obovateelliptic, 7.0–14.2 × 4.2–6.0 cm, apex emarginated, truncate
to truncate-emarginate, short mucronate, base obtuse,
lateral veins 24–29, at a 50˚– 60˚ angle with the midrib,
stipules triangular, inflorescences 16–19 cm long, cincinni
3-flowered, rarely 2- or 4-flowered, spurred sepal 1.3–1.4
cm long, spur 6.5–7 mm long, subsigmoidal, and stamen
glabrous dorsally, laxly pubescent on internal surface.
Etymology: Vochysia wilsonii is named after Wilson
Rodríguez, a most enthusiast Colombian botanist, with
an extraordinary knowledge of the floras of the Amazon
and Orinoco river basins, of neotropical ferns, and, more
recently, of Vochysiaceae.
Common names: The name “Peraikz” (Uitoto) was
recorded on the specimen Sastre & Raichel-Dolmatoff 4956.
Luis B. Marcano-Berti, Jorge M. Vélez-Puerta and Gerardo A. Aymard-Corredor. 2023. A New Species of Vochysia (Vochysiaceae, section Ciliantha, subsection Ferruginea) from the Colombian Amazon forest. Harvard Papers in Botany. 28(1); 77–84. 77 HUH.harvard.edu
NUEVA ESPECIE AMAZÓNICA DE VOCHYSIA ES NOMBRADA EN HONOR AL CURADOR DEL HERBARIO AMAZÓNICO COLOMBIANO
Resumen. Una nueva especie de Vochysia, V. wilsonii (section Ciliantha, subsection Ferruginea) es descrita y sus relaciones morfológicas con sus especies afines son discutidas. Vochysia wilsonii se encuentra en los bosques sobre mesetas en los afloramientos de arenisca y en suelos de arenas blancas de Araracuara (medio río Caquetá) y Chiribiquete, una región megadiversa del escudo guayanés colombiano, en el departamento del Caquetá. Esta nueva especie es un arbol de hasta 25 m de altura, que presenta similitudes morfológicas con cuatro especies (Vochysia biloba, V. casiquiarensis, V. sabatieri and V. vismiifolia). Sin embargo, esta difiere en la pubescencia, tamaño y forma de sus hojas, estípulas, inflorescencias, cincinos, espolón, cáliz espolonado, flores, el pétalo central y el estambre. Se incluye una clave actualizada de las 45 especies de Vochysia presentes en Colombia.
Palabras clave: Bosques húmedos, afloramientos de arenisca, Araracuara, Medio Rìo Caquetá, Vochysia, Vochysiaceae
