Typifi cation and synonymy of Santolina ageratifolia Barnades ex Asso (Asteraceae, Anthemideae), an endemic species of the Iberian Peninsula Aixa O. RIVERO-GUERRA Universidad de Sevilla, Facultad de Biología, Departamento de Biología Vegetal y Ecología, Avda. Reina Mercedes, 41012 Sevilla (Spain) and Centro de Investigação en Biodiversidade e Recursos Genéticos, Campus Agrario de Vairão, Rua Padre Armando Quintas-Crasto, 4485-661 Vairão (Portugal) [email protected] Rivero-Guerra A. O. 2011. — Typifi cation and synonymy of Santolina ageratifolia Barnades ex Asso (Asteraceae, Anthemideae), an endemic species of the Iberian Peninsula. Adansonia, sér. 3, 33 (2): 323-330. DOI: 10.5252/a2011n2a15. ABSTRACT Patterns of speciation in the angiosperm genus Santolina (Asteraceae, An- KEY WORDS themideae) have recently been intensively studied, but progress is hampered by Asteraceae, nomenclatural confusion. In this paper, the species S. ageratifolia Barnades ex Anthemideae, Asso, S. pectinata Lag. var. paniculata Loscos & J.Pardo and S. longidentata Pau Santolina ageratifolia, nomenclature, are lectotypifi ed. An invalid name has been found: S. rosmarinifolia L. subvar. taxonomy. virens macrocephala Pau. Th e nomenclature of S. ageratifolia is provided. RÉSUMÉ Typifi cation et synonymie de Santolina ageratifolia Barnades ex Asso (Asteraceae, Anthemideae), une espèce endémique de la péninsule Ibérique. Les patrons de spéciation dans le genre d’angiospermes Santolina (Asteraceae, Anthemideae) ont été récemment étudiés intensivement, mais la progression MOTS CLÉS des connaissances est entravée par la confusion nomenclaturale. Dans cet arti- Asteraceae, cle, les espèces S. ageratifolia Barnades ex Asso, S. pectinata Lag. var. paniculata Anthemideae, Loscos & J.Pardo et S. longidentata Pau sont lectotypifi ées. Un nom invalide a Santolina ageratifolia, nomenclature, été découvert : S. rosmarinifolia L. subvar. virens macrocephala Pau. La nomen- taxonomie. clature de S. ageratifolia est détaillée. ADANSONIA, sér. 3 • 2011 • 33 (2) © Publications Scientifi ques du Muséum national d’Histoire naturelle, Paris. www.adansonia.com 323 Rivero-Guerra A. O. INTRODUCTION HISTORICAL BACKGROUND Th e genus Santolina belongs to the subtribe San- Asso y del Río (1779) in Synopsis Stirpium Indige- tolininae Willk., tribe Anthemideae Cass., family narum Aragoniae, p. 116, published Santolina ros- Compositae Giseke, alternatively named Asteraceae marinifolia auct., non L. (1753) with the following Dumort. Recent investigations have focused on notation: “805. Santolina rosmarinifolia // Abrotanum reconstructing phylogeny and interpreting bio- femina, virens, vermiculato, serrato folio Barrel. Ic. 464. geography of the tribe Anthemideae (Francisco- // Provenit propè Rodenas // Planta suff ruticosa, pedalis. Ortega et al. 1997; Oberprieler & Vogt 2000; Caules virgati, unifl ori, supernènudi. Folia linearia, Watson et al. 2000, 2002; Oberprieler 2002, acuta, carnosa, duplici denticulorum serie utrinquè 2004a, b, 2005; Oberprieler et al. 2009). In the instructa. Flores duplò majores quàm in praecedenti. course of these evolutionary studies, it has also Paleae concavae”. Th is name is the homonym of the been judged helpful to revise certain taxa of this validly published S. rosmarinifolia L., and is there- tribe in need of taxonomic attention. Such is the fore illegitimate and unavailable for use under the case with Santolina, a genus endemic to the Medi- Article 53.1 of the International Code of Botanical terranean Region. Nomenclature (McNeill et al. 2006). Asso y del Río Santolina ageratifolia Barnades ex Asso (2n = 6x = adopted the Linnaeus’ name “S. rosmarinifolia” for 54), a member of the S. rosmarinifolia L. aggregate a taxon of the same rank, with explicit exclusion (Rivero-Guerra 2011) with the highest ploidy level, of the original type. Th e same author (1779) men- is an endemic species of Teruel Province, Spain, tioned the fi gure 464 of Barrelier in the protologue of restricted geographical distribution: Ródenas, of S. rosmarinifolia sensu Asso. Cerro San Ginés, and Cerro del Ardal (Almohaja) Pau (1907b) explained the origin of the name (Rivero-Guerra 2008). Th is species lives on sand- S. ageratifolia. Asso (1784) mentioned the Synopsis stone and red limolite (Ródenas population), and Stirpium Indigenarum Aragoniae in the protologue of quartzite (Cerro San Ginés). S. ageratifolia, and changed the number “805” into Pau (1907a) characterised S. ageratifolia and “850”: “Santolina rosmarinifolia Syn. n 850 // Species cited S. rosmarinifolia Asso and S. longidentata à nobis circa pagum Rodenas observata S. rosmarini- Pau as its synonyms. Th e same author in 1895, folia varietas videbatur. Eandem in herbario Cl. Bar- changed the concept and cited “– S. rosmarinifolia nades nomine Santolina ageratifolia postea invenimus, b) heterophylla subv.) virens macrocephala Pau, not. unde novam speciem esse perspicue apparuit. Caules in bot., fasc. 2, pag. 28. – S. pectinata var. paniculata? nostra, ut in Exemplari Barnadiano, simplices; folia Losc. et Pard.?” as synonyms of S. longidentata. linearia, carnosa, duplici denticulorum serie in utroque Mateo Sanz (1990) suggested that S. ageratifolia margine”. He attributed the name S. ageratifolia to and S. longidentata are synonyms of S. rosmarini- Barnades, apparently because this name was used folia L.; however, López Udías et al. (1997) cited by Barnades in the label of the voucher specimen S. rosmarinifolia subvar. virens macrocephala Pau, of his herbarium. However, there is no indication S. longidentata Pau and S. rosmarinifolia auct., non that Barnades validly published the name. Th e no- L. as synonyms of S. ageratifolia. men novum and its diagnosis are validly ascribed to Th is study was undertaken to improve our knowl- Asso y del Río (1784), under the Article 46.4 of the edge of the taxonomy of the genus Santolina and ICBN (McNeill et al. 2006). Th e same author, in to improve its nomenclature. A search for suitable Historia de la Economía política de Aragón (1798) lectotypes of S. ageratifolia, S. pectinata var. pan- emphasized that S. ageratifolia is a novel taxon “y iculata Loscos & J.Pardo, and of S. longidentata en Ródenas una especie nueva de Santolina, que el Pau, as well as the historical background and the difunto D. Miguel Barnades puso en su herbario nomenclatural discussion of these names, has been con el nombre trivial de ageratifolia”. conducted in the literature and in relevant herbaria, Th e present study is based on collections from the and these results are presented below. herbaria reported by Stafl eu & Mennega (1992), 324 ADANSONIA, sér. 3 • 2011 • 33 (2) Typifi cation and synonymy of Santolina ageratifolia Barnades ex Asso (Asteraceae, Anthemideae) where the material used by Asso y del Río (some TYPUS (as given in the protologue). — “circa pagum material in P) and Barnades (BC, BM, C, LINN, Rodenas”. MA) are deposited, and on all Spanish herbaria that LECTOTYPUS (designated here). — fi g. 464 (Abrotanum contain collections of Santolina. Specimens of S. ager- femina, virens, vermiculato, serrato folio) of Plantae per atifolia gathered by Pau (BC 30129, BM 909683, Galliam, Hispaniam et Italiam of Barrelier (1714: p. 117) UCLA, JE, W) and by Vicioso (MA 126817) were / tab. Viii.; fi g. 3 of Osservazione quarantissima prima – found. Ibáñez Cortina (2006) showed three speci- L’origine, e prima impressione di alcune piante marine, imperfette, come fuchi, corralline zeophite, fungi terrestri, mens of the genus Santolina (which classifi ed as e simili” of Schrockius (1697). S. chamaecyparissus) in the collection of Barnades at the BC herbarium. Th e study of Barnades’s col- EPITYPUS (designated here). — Teruel, Ródenas, lection indicates that these specimens do not fully 40°38’87’’N, 1°31’12’’W, 1400 m, conglomerates, sand- stone and red limolite, 15.VII.1998, A. O. Rivero-Guerra match the diagnostic characteristics of the genus s.n. (SEV 277730, Fig. 1). Santolina, and none of them are from the locus classicus of S. ageratifolia. Th e same is true of the REMARKS S. chamaecyparissus specimen fi gured by Barnades Th e fi gure 464 (Abrotanum femina, virens, vermicula- showed in his book “Herbarium pictum hispanicum” to, serrato folio) of Plantae per Galliam, Hispaniam et (six volumes). Th ese specimens should be excluded Italiam of Barrelier (1714: p. 117; http://bibdigital. from Santolina. rjb.csic.es/spa/Libro.php?Libro=1394) shows similar Loscos y Bernal & Pardo y Sastrón (1866-1867) morphological characteristics of S. ageratifolia. Bar- classifi ed as “S. rosmarinifolia L. ex Asso” the speci- relier (1714: p. 91) wrote: “1019. Santolina foliis mens from “en el soto del Cañar”, gathered by Rosmarini, major Inst. R. Herb. 461. Abrotanum Echeandia and indicated in brackets “acaso S. pec- foemina, virens, vermiculato, serrate folio Barr. Icon. tinata?”. De Jaime Lorén (2005) explained that 464 & Bocc. Muss. Part. 1 tab. Viii. Fig. 3. Abrotanum Loscos y Bernal probably studied the Asso y del Río’s foemina, foliis Rosmarini, majus C.B. Pin. 137”. Th e material in the “Sociedad Económica Aragonesa”. I author’s quotation “Bocc. Muss. Part. 1 tab. Viii. could not fi nd the specimens from the locus clas- Fig. 3” refers to Schrockius (1697), Osservazione sicus of S. ageratifolia in the Echeandia, Schultz, quarantissima prima – L’origine, e prima impressio- Schule, Vallier and Loscos y Bernal’s collections of ne di alcune piante marine, imperfette, come fuchi, the private herbarium of the “Sociedad Económica corralline