Ilex guaramacalensis (Aquifoliaceae), a new species from the Ramal de Guaramacal in the Venezuelan Andes

2008·5.5 MB·English

by  Cuello

Ilex guaramacalensis (Aquifoliaceae), a New Species from the Ramal de
Guaramacal in the Venezuelan Andes
Nidia L. Cuello A. and Gerardo A. Aymard C,
UNELLEZ-Guanare, Programa de Recursos Naturales Renovables,
Herbario Universitario (PORT), Mesa de Cavacas, Estado Portuguesa 3323, Venezuela.
[email protected]; [email protected]
Abstract. Ilex guaramacalensis Cuello & Aymard Europe, the Pacific, islands, northeastern Australia,
(Aquifoliaceae), a new species from the Andean and sub-Saharan Africa (Loizeau et al., 2005). The
forests and paramos of Guaramacal massil in first comprehensive examination of the genus was
Venezuela, is described and illustrated, and its done by A. Gray (1856; see Galle, 1997), who
morphological relationships with allied species are recognized three subgenera. The German botanist
discussed. Ilex guaramacalensis is morphologically Theodor Loesener later undertook a woildwide
similar to I. kunthiana Triana from the high mountains revision of the genus (Loesener, 1901, 1908, 1942).
of Costa Rica and Panama, the Coastal Cordillera, and He divided the genus into five subgenera including
the Andes of Venezuela to Peru, but the new species eight series, 24 sections, and 14 subsections. Hu
differs by the shape of its young branchlets, leaves, (1949,1950) subsequently revised the Ilex from China
pedicels, and petals; the higher number of secondary based on Loesener’s classification and made substan¬
veins; the shorter inflorescences; and the 4-merous tial modifications recombining mlrageneric taxa and
flowers. Information about the floristic composition describing new series and sections. Edwin (1965)
and habitat characteristics for the new species is also established a new section Guayanoilex, a group that
provided. has included, up to the present, all species endemic to
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morphology can show great variability at this same
level (Loizeau et al., 2005). Moreover, many taxa were
described only with fruiting material or only with
Ilex L. (Aquifoliaceae) is a genus of dioecious either staminate or pistillate specimens (Edwin, 1965;
shrubs or trees, with simple, alternate leaves and Steyermark, 1988). This situation has tended to
usually 4- to 5-merous flowers that are organized in overestimate the diversity of Ilex, however; for a
cymose inflorescences, with the cymes at times dioecious genus like Ilex, it is always recommended to
I el to s gle flower (Edwin, 1965, 1967; have sufficient additional material collected before
Loizeau & Spichiger, 1992). Comprising more than describing a new species.
500 species (Loizeau et al., 2007), Ilex is distributed During the past 20 years, integrated surveys by
mainly in tropical America and eastern Asia, but personnel of the Herbario Universitario (PORT),
species have also been recorded from North America, Universidad Nacional Experimental de los Llanos
doi: 10.3417/2006167 No VON 18: 319-324. Published on 2 September 2008.