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A New Tongue-Orchid (Orchidaceae) in Southwest Spain: Serapias Occidentalis

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A New Tongue-Orchid (Orchidaceae) in Southwest Spain: Serapias Occidentalis Anales del Jardín Botánico de Madrid Vol. 63(2): 131-143 July-December 2006 ISSN: 0211-1322 A new Tongue-orchid (Orchidaceae) in southwest Spain: Serapias occidentalis by Caspar Venhuis, Pepijn Venhuis & Albertine C. Ellis-Adam Institute for Biodiversity and Ecosystem Dynamics (IBED), Universiteit van Amsterdam, Kruislaan 118, 1098 SM, Amsterdam, The Netherlands [email protected] Abstract Resumen Serapias occidentalis is described from several populations Se describe Serapias occidentalis a partir de diferentes poblacio- (Campo Lugar, Obando and Aljucén) scattered over the Gua- nes (Campo Lugar, Obando y Aljucén) situadas a lo largo de la diana river basin in Extremadura, Spain. Morphological charac- cuenca del río Guadiana en Extremadura, España. Se analizan ters defining the new species are analysed, and differences with los caracteres morfológicos que definen la nueva especie y sus related Serapias taxa from the Iberian Peninsula and other Euro- diferencias con otras Serapias de la Península Ibérica y de Euro- pean countries are established. In addition, distribution, ecology pa. Además, se discuten diversos aspectos de su distribución, and reproduction are discussed. hábitat y reproducción. Keywords: Orchidaceae, Serapias, taxonomy, Spain, Ex- Palabras clave: Orchidaceae, Serapias, taxonomía, España, Ex- tremadura. tremadura. Introduction 1991; Delforge, 1995b, 2002). Most recent studies, however, report several other Serapias species cover- The genus Serapias L. (Tongue-orchids) comprises ing large parts of this distribution area and suggest 26 species (Delforge, 2002), with a predominantly that at least parts of the populations previously con- Mediterranean distribution. Its range extends from sidered as S. vomeracea would, in fact, be representa- the Azores and the Canaries in the west to the Cauca- tives of those species. The taxa concerned are S. stric- sus in the east, and north as far as Brittany (France) tiflora Welwitsch ex Veiga and S. elsae P. Delforge (S. (Gölz & Reinhard, 1980; Pérez Chiscano & al., 1991; parviflora group) and S. bergonii E.G. Camus, S. ori- Delforge, 1995b, 2002). entalis (Greuter) H. Baumann & Künkele, S. levanti- Venhuis & al. (in prep) performed multivariate sta- na H. Baumann & Künkele and S. feldwegiana H. tistical analyses on all Serapias species occurring in the Baumann & Künkele (S. vomeracea group). Iberian Peninsula and France and distinguished two According to Kreutz (2004), S. vomeracea consists main groups: a S. parviflora group and a S. vomeracea of three subspecies: S. vomeracea subsp. vomeracea group. These two groups were separated predomi- (Figs. 3c, d), S. vomeracea subsp. longipetala (Ten.) H. nantly on the basis of the epichile width, which varied Baumann & Künkele (Fig. 4a) and S. vomeracea between 3-8(9) mm and (7)8-28 mm, respectively. Se- subsp. istriaca (Perko) Kreutz (Fig. 4b). S. vomeracea rapias vomeracea (Burm. fil.) Briq. has been reported subsp. longipetala occurs in Italy and Greece (Bau- for nearly the entire European Mediterranean mann & Künkele, 1991) and S. vomeracea subsp. is- zone (Richter, 1890; Koch, 1907; Schlechter, 1923; triaca is endemic for Istria (Delforge, 2004). The dis- Hermann, 1956; Meusel & al., 1965; Nelson, tribution of S. vomeracea subsp. vomeracea probably 1968; Landwehr, 1977; Gölz & Reinhard, 1980; extends from the northeastern part of Spain (Benito Moore, 1980; Meikle, 1985; Pérez Chiscano & al., Ayuso & Tabuenca Marraco, 2001), Basque country 132 C. Venhuis & al. (Lizaur & Lazare, 2004), the lower Pyrenees, south- northern, central and southern Italy and Greece. ern France (Gölz & Reinhard, 1980) and southern Flowers from specimens of this subspecies are more Switzerland (Gölz & Reinhard, 1980; Moser & al., slender than S. vomeracea subsp. vomeracea and defi- 1999) to northern Italy (Gölz & Reinhard, 1980; Bau- nitely different from the plants from Extremadura. mann & Künkele, 1991; Kropf, 2002). Pérez Chiscano (1977) describes Extremaduran In the last 150 years, S. vomeracea and its synonyms populations that probably evolved by hybridisation –S. pseudocordigera (Sebastiani) Moricand and S. between S. vomeracea and S. lingua (= S. × intermedia longipetala (Tenore) Pollini– have often been report- Forest.), but in 1991 Pérez Chiscano & al. mentioned ed from the Iberian Peninsula. Intensive studies dur- no hybrids with any Serapias species. Devesa Alcaraz ing the past 20 years have improved insight into the (1995) notes that Extremaduran S. vomeracea and Serapias group. On the basis of these studies, we sup- S. cordigera often form transitions towards S. lingua. posed that earlier presentations of S. vomeracea (or Recently, Benito Ayuso & Tabuenca Marraco (2001) equivalent names) from predominantly southwestern suggested that individuals on photographs of S. coastal regions of the Iberian Peninsula by Pérez Lara vomeracea subsp. vomeracea, taken of populations in (1886), Coutinho (1913), Martínez Gámez (1921), Extremadura by Pérez Chiscano & al. (1991) differ to Camus & Camus (1928), Vicioso (1948), Bodegom some extent from S. vomeracea from the northeastern (1972), Landwehr (1977), Rivera & Cabezudo (1985), part of Spain. Confusion is further augmented by the Valdés & al. (1987), Buján & al. (1990) and Sáez & al. fact that Tyteca (1997), Kreutz (pers. comm., 2004), (2005) probably represent S. strictiflora (Fig. 4c) or Benito Ayuso (pers. comm., 2004) and Venhuis & al. S. elsae. Recent studies indeed confirm that S. vome- (2004) postulated that the individuals shown in these racea does not occur in northwestern Spain (Cor- photos display morphological similarities with S. tizo & Sahuquillo, 1999), Portugal (Tyteca, 1997; cordigera L, which occurs throughout Iberian Penin- Delforge, 2002; Venhuis & al., 2004, Sáez & al., 2005), sula (Willkomm, 1861; Nieschalk & Nieschalk, 1973; the province of Málaga (Lowe, 1998) and other south- Landwehr, 1977; Pérez Chiscano & al. 1991, Sáez & ern and central parts of Spain up to Madrid (Benito al., 2005). Ayuso & Tabuenca Marraco, 2001). However, reports On the basis of the morphological data presented of S. vomeracea by Willkomm (1861), Gandoger in this paper, the putative S. vomeracea from Ex- (1890), Montserrat (1962), Van der Sluys & González tremadura probably originated from hybridisation Artabe (1980), Romero & Rico (1989), Cebolla & Ri- between S. vomeracea subsp. vomeracea and S. cordi- vas (1994), Delforge (1995a) and Sáez & al. (2005) of gera. Consequently, these plants should be considered the northeastern part of Spain presumably involve a new taxon, which we propose to name S. occidenta- S. vomeracea subsp. vomeracea (Table 4; Figure 8). lis. This is supported by the map of distribution of S. vomeracea presented by Benito Ayuso & Tabuenca Methods Marraco (2001), which is based on observations to the north of Madrid and from more northeastern locali- In the spring of 2004 we compared all the Serapias ties. species that occur at the western part of the Mediter- In Extremadura, S. vomeracea was first reported by ranean zone (mainland of Spain, Portugal, France, Rivas Mateos (1931) as S. pseudocordigera. Subse- and western Italy) we sought stable and uniform quently, Rivas Goday (1964) used the name S. lon- characteristics that could distinguish between popu- gipetala for plants of the same region. More recently, lations of different regions. To get a representative Pérez Chiscano & al. (1991) mentioned S. vomeracea view, we studied three populations per species (Table subsp. vomeracea for Extremadura. However, a 1) and measured 25 randomly selected specimens of meticulous morphological study by us of this taxon each population, for a total of 75 specimens per from that region revealed significant differences from species. Vouchers are kept at the AMD herbarium data on populations collected in southern France and (Table 1). For each population, we measured fifteen western Italy, northern Italy by Gölz & Reinhard quantitative (Table 2) and eight qualitative charac- (1980) and Baumann & Künkele (1991) and Madrid ters; the hair density, distribution, curvation, shape by Benito Ayuso (pers. comm., 2005) for S. vomeracea and position of the epichile, the shape and lamellae subsp. vomeracea. We also compared our measure- position, hood position, the petal shape and the bract ments with data reported by Baumann & Künkele versus hood ratio. The three populations for each (1991) and data provided by Pellegrino (pers. comm., species were all chosen with a maximum possible dis- 2005) of S. vomeracea subsp. longipetala from tance (min. 50 km) between, to avoid spatial and ge- Anales del Jardín Botánico de Madrid 63(2): 131-143. July-December 2006. ISSN: 0211-1322 A new Tongue-orchid (Orchidaceae) in southwest Spain: Serapias occidentalis 133 Table 1. Sampled populations of the studied Serapias species belonging to the S. vomeracea group, including vouchers. Species Location Region Country Voucher S. cordigera Cotifo Algarve Portugal S. cordigera Badajoz Extremadura Spain S. cordigera Frejus Var France AMD122572-122573 S. perez-chiscanoi Badajoz Extremadura Spain S. perez-chiscanoi Aljucén Extremadura Spain S. perez-chiscanoi Trujillanos Extremadura Spain S. occidentalis Campo Lugar Extremadura Spain AMD122200-122202 S. occidentalis Obando Extremadura Spain AMD123300-123302 S. occidentalis Aljucén Extremadura Spain S. vomeracea subsp. vomeracea Arquettes-en-Val Aude France S. vomeracea subsp. vomeracea Pierrefeu-du-Var Var France S. vomeracea subsp. vomeracea Taggia Liguria Italy AMD122570
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