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Posters 108 NEW DATA ON DIVERSITY OF PYRUS (ROSACEAE) IN SICILY Francesco M. RAIMONDO, Rosario SCHICCHI, Pietro MAZZOLA Dipartimento di Scienze Botaniche dell'Università, Palermo, Italy; raimondo@unipa.it The high diversity in the genus Pyrus, in Sicily, has recently allowed the description of some news species – i.e. P. vallis-demonis, P. castribonensis and P. sicanorum – in addition to the previously known P. spinosa, P. pyraster and P. communis. Recent observations have also stressed the great variability of the populations and the hardeness to definite the most meaningful and frequent expressions of the variation within taxonomic units. The genetic diversity of the above mentioned new taxa has been also compared with P. spinosa, P. pyraster and P. communis. The results show a high similarity between P. castribonensis and P. spinosa, and between these and P. communis and P. pyraster. P. sicanorum appears rather distinct; finally, P. vallis-demonis, appearing close to P. cordata, is therefore quite distinct from all the above mentioned taxa.This variability is referred to both previous and active hybridation processes, as well as to the gene flow between the wild taxa and the huge number of P. communis cultivated forms, produced by millenary agricultural activity in Sicily. Infact, about 150 ethno-varieties have so far been counted, more than 50% of which occur in the Madonie mountains, that are among the most important Sicilian centres of wild diversity. Another remarkable centre is found on the Nebrodi mountains, where the census of cultivated forms is still in progress. In this context, a new population consisting of different aged indiduals which constantly bear peculiar morphological characteristics has been found confined in the Mediterraneantemperate belt of the Madonie mountains. It could be delimited as a new taxon of specific rank related to P. spinosa. Keywords: Taxonomy, Rosaceae, Maloideae, Sicilian flora. 44
NOMENCLATURAL AND TAXONOMIC REMARKS ON “PRUNUS CUPANIANA” (ROSACEAE) FROM SICILY Francesco M. RAIMONDO, Vivienne SPADARO Dipartimento di Scienze Botaniche dell'Università, Palermo, Italy: raimondo@unipa.it “Prunus cupaniana” is a nomen nudum doubtfully given by Gussone (1842) to some Sicilian populations close to Prunus mahaleb L. from which they are distinct by both biological and ecological characters. This name was later cited by Nyman (1878) which did not provide its validation, contrary to the erroneous IPNI report “Prunus cupaniana Guss. ex Nyman -- Consp. Fl. Eur. 1: 213. 1878 [Sep 1878]“. Fiori (1926) applied the Gussone’s epithet to the infraspecific combination “Prunus mahaleb � cupaniana (Guss.)”, which is invalid being based on a nomen nudum. Before Fiori, Lojacono (1891) treated the same populations under P. mahaleb var. prostrata. Recently Raimondo & Spadaro [in Fl. Medit. 19: 309 (2009)] treated the population of “Prunus cupaniana” as Prunus mahaleb subsp. cupaniana. This latter name is invalid too. In order to maintain the subspecific rank, the examined taxon is here treated as: Prunus mahaleb subsp. prostrata (Lojac.) Raimondo & Spadaro st. nov. [Bas. Prunus mahaleb var. prostrata Lojac., Fl. Sic. 1(2): 164 (1891); Prunus mahaleb subsp. cupaniana (Guss.) Raimondo & Spadaro, nom. inval.] This subspecies differs from P. mahaleb subsp. mahaleb by its characteristic prostrate or ascending many-stemmed bushy habit; leaves cordate, coriaceous; corymb poor with small flowers; fruits small, ovoid, slightly flattened, black when ripened. It is also ecologically distinct. Keywords: Taxonomy, Nomenclature, Flora, Sicily. 109 45 Posters
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OrganizationCommittee: ............
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) Posters: Ahmet AKSOY, Durmu� OK
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H. A�k�n AKPULAT, Ebru ATA�LA
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Stanislav ŠPANIEL, Judita LIHOVÁ,
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March 22, 2010 Monday 09:00 - 10:30
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11:45 - 12:15 AKAN, H. "The Botanic
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Oral Lectures 14 CONSERVATION OF ME
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Oral Lectures METALLOPHYTES, HYPERA
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Oral Lectures 18 STUDY CASES ON CON
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Oral Lectures 36 CHENOPODIACEAE IN
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Posters CONSERVATION OF BIODIVERSIT
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