<p>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 ...

<p>A new species of Podostemaceae, <em>Podostemum irgangii</em>, from the states of Santa Catarina and Parana, Brazil, is described and illustrated. Features that distinguish the new species are the uniformly verticillate ...

<p>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 ...

<p>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 ...

<p>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 ...

<p><em>Premise of the Study</em>: 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 ...

<p>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, ...

<p>Androdioecy (the presence of males and hermaphrodites in a breeding population) is a rare reproductive system in plants, with <em>Datisca glomerata</em> (Datiscaceae) representing the only well-documented example. Recent ...