Morphological Variation within and Between taxa of the Santolina rosmarinifolia L. (Asteraceae: Anthemideae) Aggregate

Typification and synonymy of names in Santolina (Asteraceae: Anthemideae) published by Hoffmannsegg and Link

“…& Link) Valdés‐Bermejo by Valdés‐Bermejo and Antunez (1981). Llamas García (1984), Silva‐Pando et al (1984), Rodríguez‐Oubiña and Ortiz (1993) and Rivero‐Guerra (2010b) all recognised this subspecies. However, López Udías et al (1997), Rodríguez‐Oubiña and Ortiz (1998) and Greuter (2008) recognised S. semidentata as a separate species.…”

“…Nyman (1854–1855), Franco (1984), Greuter (2008) and Rivero‐Guerra (2010a, 2010b) all accepted this species. In contrast, Couthinho (1913) reduced S. impressa to a variety of S .…”

“…arrabidensis Rivero‐Guerra (2n=4x=36), endemic to Sierra de Arrábida, Portugal (Rivero‐Guerra 2008c). However, they are morphologically differentiated (Rivero‐Guerra 2010b) and probably not sympatric at present. The voucher specimen (BM 909648) collected by Welwitsch in 1840 on “ declives calcaires sinistram Tagi prope Aldea dos Irmãos” is the only evidence that these two taxa coexist.…”

“…One example is Santolina , a genus endemic to the Mediterranean Region. Recent studies based on cytogenetics, morphology and ecogeography, Rivero‐Guerra (2008a,b,c, 2009, 2010a, 2010b) demonstrated that the S . rosmarinifolia aggregate consist of 11 taxa.…”

“…rosmarinifolia aggregate consist of 11 taxa. The pattern of morphological variation indicate a recent diversification process and as a consequence the included taxa are poorly differentiated (Rivero‐Guerra 2010b). During these studies, nomenclatural problems with the names S .…”