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Two new species of Euphorbia sect. Nummulariopsis (Euphorbiaceae) from South America

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Author(s): Carrillo-Reyes, Pablo | Steinmann, Victor W.

Journal: Anales del Jardín Botánico de Madrid
ISSN 0211-1322

Volume: 68;
Issue: 2;
Start page: 167;
Date: 2011;
Original page

Keywords: Brazil | Euphorbia cordeiroae | E. guaraniorum | Paraguay | Portulacastrum | Brasil | Euphorbia cordeiroae | E. guaraniorum | Paraguay | Portulacastrum

ABSTRACT
Two new species of sect. Nummulariopsis, Euphorbia guaraniorum and E. cordeiroae, are described and illustrated. Euphorbia guaraniorum appears to be related to E. portulacoides and is distinguished by its densely arranged ensiform leaves. It is known only from the Yacyretá and Ybycui Islands in southern Paraguay. Euphorbia cordeiroae, occurs in the state of Goiás, Brazil, and is similar to E. stenophylla, from which it differs in its higher stature and very narrow and loosely arranged leaves.Dos nuevas especies de la sección Nummulariopsis, Euphorbia guaraniorum y E. cordeiroae son descritas e ilustradas. Euphorbia guaraniorum parece estar relacionada con E. portulacoides, de la que se distingue por sus hojas ensiformes densamente agrupadas y se conoce solo de las islas Yacyretá e Ybycui, en el sur de Paraguay; E. cordeiroae, conocida sólo del estado de Goiás, Brasil, se compara con E. stenophylla, de la que se diferencia por ser una planta más alta y por sus hojas extremadamente delgadas y con un arreglo laxo.
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