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Abstract Detail

Systematics Section/ASPT

Salazar, Jackeline [1], Santiago-Valentin, Eugenio [2], Clase, Teodoro [3], Martinez, Nirzka [2], Mateo, Amelia [4].

Two new species of Tabebuia ex Dc Gomez (Bignoniaceae) from Puerto Plata, Dominican Republic.

Bignoniaceae in the West Indies is dominated by the genus Tabebuia Gomes ex DC. This genus belongs to the tribe Tecomae and the Tabebuia alliance group. The majority of the described species of Tabebuia are concentrated in the West Indies with around 60 species, 54 of which are considered to be endemic to the region. The bulk of its species are in the Greater Antilles, especially in the islands of Cuba and Hispaniola. Hispaniola has circa 25 species with around 76 % of the species endemic to this island. In Hispaniola Tabebuia occurs in a wide altitudinal range, from 0 to 2,099m asl. Here two new endemic species are described for Hispaniola. These species are located in the North coast of the Dominican Republic in Puerto Plata. Now the number of species for Hispaniola has increased to 27 species. Tabebuia puertoplatensis Salazar, Santiago-Valentin & Clase and T. hispaniolensis Salazar, Santiago-Valentin & N. Martinez, two new species of the family Bignoniaceae are described and illustrated for the Dominican Republic. These two species are known from areas of humid forest in the province of Puerto Plata (Northern Dominican Republic). The morphological descriptions of the species are based on herbarium specimens collected in Puerto Plata Province, Dominican Republic. The herbarium specimens were studied using a Nikon stereomicroscope and epidermal characters were evaluated using a Scanning Electron Microscopy (SEM) and a light microscopy. For SEM micrographs small portions of the leaves were taken, mounted on a stub, and critical-point dried and sputtered with gold. A JEOL 6480LV scanning electron microscope—Materials Characterization Center,at the University of Puerto Rico, Río Piedras—was used to assess and photograph the specimens. Epidermal peeling maceration following the Gifford technique was done to clarify leaf epidermis, and which was studied and photograph with an Eclipse E200 microscope with a digital Nikon Digital Sight DS-Fi1camara. Both species can be well differentiated based on morphological characters. Tabebuia puertoplatensisis is characterized by having three leaflets with base Inequilateral (oblique), apex retuse, and leaf surface sparsely lepidote, whereas Tabebuia hispaniolensis has one to three leaflets base cuneate, apex acute to acuminate, and leaf surface middle to densely lepidote.

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1 - Universidad Autonoma De Santo Domingo, Ciudad Universitaria, DN, N/A, 10030, Dominican Republic
2 - Universidad de Puerto Rico, Recinto Río Piedras, Puerto Rico, PR
3 - Jardín Botánico de Santo Domingo, Santo Domingo
4 - Universidad Autónoma de Santo Domingo, Santo Domingo

Dominican Republic.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PSY033
Abstract ID:896
Candidate for Awards:None

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