Abstract
The Sierra de Maigualida is a poorly explored mountain range in the central Guayana Shield with high levels of endemism. In the present installment, this area is further delimited and mapped, toponymy is reviewed, and the genus Ilex L. is locally reviewed, with two species, namely I. huberi J.R.Grande sp. nov. and I. maigualidensis J.R.Grande sp. nov., described as new to science. Ilex huberi sp. nov. can be distinguished by its leaf blades strongly revolute, mucronate, and with obscure secondary venation, simple dichasia, and depressed-lunate sepals; I. maigualidensis sp. nov. by its dull leaves, flowers with undeveloped styles, and capitate-subcoronate stigmata. Stem buds and cataphylls are proposed as useful characters in species delimitation within the genus, while I. magnifructa Edwin is illustrated for the first time. A key is presented to differentiate all the species of Ilex of the Sierra de Maigualida.
Subject
Plant Science,Ecology, Evolution, Behavior and Systematics
Reference28 articles.
1. Berry P.E., Loizeau P.-A. & Steyermark J.A. 2007. Aquifoliaceae. In Funk V., Hollowell T., Berry P., Kelloff C. & Alexander S.N. (eds.), Checklist of the Plants of the Guiana Shield (Venezuela: Amazonas, Bolivar, Delta Amacuro; Guyana, Surinam, French Guiana). Contributions from the United States National Herbarium 55: 203-205.
2. Cuénoud P., Del Pero Martínez M.A., Loizeau P.-A., Spichiger R., Andrews S. & Manen J.-F. 2000. Molecular Phylogeny and Biogeography of the Genus Ilex L. (Aquifoliaceae). Annals of Botany 85: 111-122.
3. Edwin G. 1965. Aquifoliaceae. In Maguire B. & al., Botany of the Guayana Highland, part VI. Memoirs of the New York Botanical Garden 12 (3): 1-285.
4. Galle F.C. 1997. Hollies: the genus Ilex. Timber Press, Portland.
5. Botanical Novelties from Sierra de Maigualida, southern Venezuela. II;Grande;Anales del Jardín Botánico de Madrid,2012