Abstract

A new subspecies of E. paniculata Desf., E. paniculata subsp. calcicola U.Schwarzer & Vicens subsp. nov., is described. It grows in the proximity of the town of Sagres —southwestern Portugal— on calcareous substrate.

Highlights

  • The genus Euphorbia L., in strict sense, is represented in the Iberian Peninsula by 54 species (Benedí & al. 1997)

  • In the Iberian Peninsula, E. paniculata was previously known from its southwestern quadrant (Benedí & al. 1997) until further explorations discovered some populations in the southeastern provinces of Murcia and Almería (Sánchez Gómez & al. 2006)

  • Their morphology was compared to individuals of E. paniculata subsp. monchiquensis from populations in the southern Portugal and to herbarium specimens kept in BCN

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Summary

Introduction

The genus Euphorbia L., in strict sense, is represented in the Iberian Peninsula by 54 species (Benedí & al. 1997). The genus Euphorbia L., in strict sense, is represented in the Iberian Peninsula by 54 species Some species are quite variable morphologically and subespecies are recognized. This is the case of E. paniculata Desf., a species with a wide distribution range in the Iberian Peninsula and North Africa. This species has habitat preferences restricted to marshes or areas close to streams, which result in populations appearing in isolated patches. In the Iberian Peninsula, E. paniculata was previously known from its southwestern quadrant During recent fieldwork in the Sagres Peninsula of Portugal, two populations of Euphorbia with unclear identity were discovered. The general aspect resembled E. paniculata subsp. monchiquensis (Franco & P.Silva) Vicens, Molero & C.Blanché, but the leaves were clearly different, more similar to those of E. clementei Boiss

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