Revisión del género Arrhenatherum Beauv. (Gramineae) en la Península Ibérica

Morphology, leaf Anatomy and Caryology of Arrhenatherum taco (Gramineae) from Iberian Peninsula are studied. Six taxa arranged in two species are recognized. A. elatius subsp. baeticum Romero Zarco is described, and two varieties are recognized in A. album (Vahl) W.D.Clayton, proposinga new combination, A. album var. erianthum (Boiss. & Reuter) Romero Zarco. Synonymy, distribution and, when posible, typification, are given for every taxa. Species delimitation and natural hybrids are discussed.Se estudia la morfología, anatomía foliar y cariología de los taxones del género Arrhenatherum Beauv. (Gramineae)de la Peninsula Ibérica. Se reconocen seis tacones agrupados en dos especies. Se describe A. elatius subsp.baeticum Romero Zarco y se separan en A. album (Vahl) W.D. Clayton dos variedades, proponiéndose una nueva combinación, A. album var. erianthum (Boiss & Reuter) RomeroZarco. Para cada taxón se indican sinonimia, distribución y, cuando ha sido posible, tipificación. Se discuten la delimitación de las especies y los híbridos naturales

Juncus fernandez-carvajaliae

This species is endemic to central Spain, where it is currently only known from two sites in the Guadiana River basin located in the western half of Ciudad Real Province. Suitable habitat is frequent around both known sites, and the potential distribution area of this new species could be much larger. However, very little data are available at present regarding its population size, trends or threats and therefore it is assessed as Data Deficient; further research is required

Cytotaxonomical considerations on Epipactis robatschiana

Abstract Epipactis robatschiana is a new species, described from Calabria (S Italy), where it grows in underwood of acidophilous pine-forests and beech-forests. This species is diploid with chromosome number 2n=2x=38. The karyotype is asymmetrical and consists of 4 large and 15 small chromosome pairs. C-banding patterns of this new species is quite similar to those of the other species of E. muelleri group, but it differs in the distribution of some heterochromatin bands. Its ecology and relationships with allied species are discussed too