A REVISION OF ISERTIA (ISERTIEAE: RUBIACEAE) (SOUTH, CENTRAL AMERICA, CARIBBEAN).
Item
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Title
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A REVISION OF ISERTIA (ISERTIEAE: RUBIACEAE) (SOUTH, CENTRAL AMERICA, CARIBBEAN).
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Identifier
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AAI8401920
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identifier
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8401920
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Creator
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BOOM, BRIAN MOREY.
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Contributor
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Prof. Scott A. Mori
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Date
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1983
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Language
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English
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Publisher
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City University of New York.
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Subject
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Biology, Botany
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Abstract
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Isertia (Isertieae: Rubiaceae) is a genus of shrubs and small trees ranging throughout Central America and northern South America and occurring sporadically in the Caribbean. It is an important floristic element in a variety of habitats ranging from savannas to successional and mature rain forests. This revision is based on herbarium, field, and laboratory studies. Seeds and pollen are surveyed by scanning electron microscopy and wood anatomy is studied by light microscopy. The geographic distributions of the taxa are mapped and their ecologies discussed on the basis of herbarium specimen label data. The phylogeny of the genus is discussed in the context of neotropical paleogeography. Diversification of the genus at the sectional level appears to have resulted from the major uplift of the Andes in the Pliocene. Diversification at the species level can be explained by the climatic fluctuations during the Pleistocene as predicted by the Refuge Theory. In the systematic treatment the genus is described and a key is given to the 14 species, each of which is discussed. One new species, I. scorpioides B. M. Boom, one new combination, I. laevis (Triana) B. M. Boom, and one new status, I. section Cassupa (Humb. & Bonpl.) B. M. Boom, is proposed. Indices to exiccatae and to local names are included.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Biology
