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Showing 1 to 2 of 2 for “"Houstonia"”.
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Molecular Phylogeny of the Genus Houstonia and Allies in Rubiaceae
<p>Houstonia (Rubiaceae) is a strictly North American genus of 24 species distributed from Mexico, throughout the United States, up to Canada. Houstonia has proven to be a taxonomically difficult genus since the Linnaean description of Houstonia and the related genera: Hedyotis and Oldenlandia in …
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The Detection of Morphological Variation across Time in Two Roan Mountain Endemics: <em>Geum radiatum</em> and <em>Houstonia montana</em>.
… plant species <em>Geum radiatum</em> and <em>Houstonia montana</em>. During the last century the vegetation on Roan Mountain has undergone numerous environmental pressures that may have produced morphological shifts.</p> <p>A diverse suite of morphological characters was measured from both …