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Rhigospira
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<p><i>Rhigospira</i> is a <a href="/facts/Genus/m8EFjSms">genus</a> of <a href="/facts/Flowering_plant/E5eGYIvY">flowering plants</a> in the <a href="/facts/Family_(biology)/qTrn6E8E">family</a> <a href="/facts/Apocynaceae/FAQmY5tB">Apocynaceae</a>, first described as a genus in 1878 by <a href="/facts/John_Miers_(botanist)/wL03z13e">John Miers</a>. The species, <i>Rhigospira quadrangularis</i> was first described as <i>Ambelania quadrangularis</i> by <a href="/facts/Johannes_M%C3%BCller_Argoviensis/vqVgHNU3">Johannes Müller Argoviensis</a> in 1860 but was transferred to the genus, <i>Rhigospira</i>, in 1878 by John Miers. The genus contains only one known species, <i>Rhigospira quadrangularis</i>, native to northwestern <a href="/facts/South_America/PhrFEMk7">South America</a> (<a href="/facts/Colombia/nl7r8Q2u">Colombia</a>, <a href="/facts/Venezuela/eX1qnkln">Venezuela</a>, <a href="/facts/Peru/dBt7XrYD">Peru</a>, NW <a href="/facts/Brazil/QHkG46GL">Brazil</a>). </p> formerly placed in the genus<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> <ul><li><i>Rhigospira paucifolia</i> (Müll.Arg.) Miers = <i>Macoubea guianensis</i> Aubl.</li> <li><i>Rhigospira reticulata</i> (A.DC.) Miers = <i>Macoubea guianensis</i> Aubl.</li> <li><i>Rhigospira sinuosa</i> Miers = <i>Macoubea guianensis</i> Aubl.</li> <li><i>Rhigospira sprucei</i> (Müll.Arg.) Miers = <i>Macoubea sprucei</i> (Müll.Arg.) Markgr.</li> <li><i>Rhigospira ternstroemiacea</i> (Müll.Arg.) Miers = <i>Neocouma ternstroemiacea</i> (Müll.Arg.) Pierre</li> <li><i>Rhigospira venulosa</i> Miers = <i><a href="/facts/Spongiosperma_macrophyllum/bArwQHnH">Spongiosperma macrophyllum</a></i> (Müll.Arg.) Zarucchi</li></ul>