Browsing Department of Biology & Environmental Sciences Faculty Papers by Author "Philbrick, Tom"
Now showing items 1-20 of 21
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A New Genus of Podostemaceae from Venezuela
(2011-12-01)The new genus Autana C. T. Philbrick and species A. andersonii C. T. Philbrick are illustrated and described. The new species is documented from four rivers that drain into the Orinoco River, Amazonas, Venezuela. Autana ... -
A new species of Castelnavia (Podostemaceae) from Tocantins, Brazil
(2008-01-01)Castelnavia noveloi C. T. Philbrick & C. P. Bove is distinguished from other species of Castelnavia Tulasne & Weddell (Podostemaceae) based on the production of stems arising perpendicular from the leaf petiole (petiolar ... -
A New Species of Ceratolacis (Podostemaceae) from Minas Gerais, Brazil
(2004-03-01)A new species of Ceratolacis (C. pedunculatum) is illustrated and described. The new species is known from four locations in central Minas Gerais, Brazil. Ceratolacis pendunculatum is distinguished from the only other ... -
A New Species of Podostemum (Podostemaceae) from the States of Paraná and Santa Catarina, Brazil
(2001-01-01)A new species of Podostemaceae, Podostemum irgangii, from the states of Santa Catarina and Parana, Brazil, is described and illustrated. Features that distinguish the new species are the uniformly verticillate leaves and ... -
Chromosome Counts for Callitriche (Callitrichaceae) in North America
(1994-01-01)Somatic chromosome numbers are reported for nine species and one variety of Callitriche (Callitrichaceae). The following new reports are included: 2n = 20 (C. nuttallii, C. marginata), 2n = 40 for one of four populations ... -
Comparative Pollen Morphology and Ultrastructure of the Callitrichaceae
(2000-01-01)The Callitrichaceae are an aquatic family of dicots that include the single, geographically cosmopolitan genus Callitriche. Calliltriche contains 40-50 terrestial, amphibious, and oligately submersed species, and it is the ... -
Developmental Morphology of New World Podostemaceae: Marathrum and Vanroyenella
(1999-01-01)Podostemaceae live in swift-running rivers with stony beds, mainly in the Tropics. This article is a comparative study of three Marathrum spp. (M. rubrum, M. schiedeanum, and M. tenue) and the monotypic genus Vanroyenella ... -
Endemism in Neotropical Podostemaceae
(2010-01-01)Podostemaceae, a family of plants restricted to river rapids and waterfalls, are widely reported to have a high degree of local species endemism. We tested this idea for Neotropical members of the family using historical ... -
Evolution of Aquatic Angiosperm Reproductive Systems
(1996-12-01) -
Exine Reduction in Underwater Flowering Callitriche
(1994-10-01)Both aerial and underwater pollination systems (hypohydrophily) occur in Callitriche (Callitrichaceae), and as such the genus can serve as a model system in which to probe questions concerning the evolution of hypohydrophily ... -
Intraspecific Variation in Podestemum Ceratophyllum (Postostemacea): Evidence of Refugia and Colonization Since the Last Glacial Maximum
(2012-01-01)Premise of the Study: Intraspecifi c variation among 20 populations of Podostemum ceratophyllum Michx. was investigated to test the hypothesis of range expansion from southern refugia since the last glacial maximum. Methods: ... -
Invasion and spread of Callitriche Stagnalis (Callitrichaceae) in North America
(1998-01-01)Callitriche Stagnalis (Callitrichaceae) is a widespread aquatic species in the Old World, but an adventive component of the North American flora. Herbarium records are used to document the historical and current distribution ... -
Monograph of Castelnavia (Podostemaceae)
(2009-01-01)A monograph of Castelnavia is presented. Phylogenetic analyses of morphological characters reveal eight nonhomoplasious synapomorphies supporting the monophyly of the genus: 1) absence of roots, a 2) unilocular mature, 3) ... -
Podostemaceae - Introduction
(1997-06-01) -
Pollen Production in the Androdioecious Datisca Glomerata (Datiscaceae): Implications for Breeding System Equilibrium
(2005-02-01)Androdioecy (the presence of males and hermaphrodites in a breeding population) is a rare reproductive system in plants, with Datisca glomerata (Datiscaceae) representing the only well-documented example. Recent reports ... -
Preanthesis Cleistogamy in the Genus Podostemum (Podostemaceae)
(2006-01-01)Podostemum from South America (P. comatum, P. distichum, P. irgangii, P. muelleri, P. ovatum, P. rutifolium subsp. rutifolium, P. scaturiginum, P. weddellianum) and the North American P. ceratophyllum. Fluorescence microscopy ... -
Seed Germination of Mexican Podostemaceae
(1994-05-01)
