Vascular flora of calcareous outcrops in North-Western Sardinia (Italy)

Calcareous outcrops in North-Western Sardinia cover a large area (about 380 Km2) known as "Sassarese". In this study the vascular flora of this area is investigated. The actual flora is checked and, when possible, older references, synonyms and critical notes are given. The floristic list includes 840 entities. Among them, 18 have been cultivated (cultae), 11 are considered erroneously reported and so they are excluded from this area (excludendae) and 81 are in various ways considered not confirmed and to enquiry (inquirendae). The current floristic contingent is therefore reduced to 730 entities, divided into 98 families and 385 genera, many of them here documented for the first time in this area. Among them the more relevant are the Sardinian-Corsican endemic Silene nodulosa Viv. and the Sardinian endemic Hieracium gallurense Arrigoni, previously reported only for granite substrata in North-Eastern Sardinia. The biological spectrum shows a clear dominance of therophytes (41%). The chorological spectrum highlights the dominance of the Tethydic element, in which the dominance of more strictly Mediterranean element emerges. Four entities have in this area their locus classicus: Centaurea corensis Valsecchi et Filigheddu, Limonium racemosum (Lojac.) Diana and Scrophularia morisii Valsecchi, exclusive of the region object of this study, and Ophrys sphegodes Mill. subsp. praecox Corrias. Some entities, though not endemic, have a limited or fragmentary distribution in Sardinia, e.g. Capparis spinosa L. subsp. rupestris (Sm.) Nyman, Coridothymus capitatus (L.) Reichenb. f. and Erica multiflora L., whereas Viola arborescens L.. Borago pygmaea (DC.) Chater et Greuter and Carex panormitana Guss. are included in the Red Book of Italian Plants. Although the area is strongly urbanised and subjected since long time ago to agricultural and pastoral uses, its flora is still rather diversified. The presence of species depending on the existence of hedges, dry-stone walls and other smaller structures belonging to traditional agricultural activities still present, is also substantial, even though their dilapidated state is often high. Finally the presence of floristic elemento of great interest together with small residuals of spontaneous vegetation are of very high value. Indeed, several natural elements from traditionally agricultural activities are present within an area of intense anthropic impact. The indiscriminate building development of the valleys, the reckless exploitation of the water sources and the diffusion of dumps, threaten increasingly some habitats of the region. The improvement of the natural resources could be done through an adeguate ecological net starting from a basic knowledge of the floristic biodiversity, that is the main aim of this work

Lectotypification of <i>Artemisia variabilis</i> Ten. (Compositae)

The name Artemisia variabilis Ten. is here lectotypified. Observations and synonyms are given

Ricerche biosistematiche e corologiche sulle Thymelaeaceae in Italia: 1. <i>Daphne alpina</i> L.

Distribution, systematics and taxonomy of Daphne alpina L. are discussed. The taxon Daphne alpina L. subsp. scopoliana Urbani is here described for the first time

Nuove segnalazioni di <i>Thymelaea tartonraira</i> (L.) All. in Italia meridionale

New localities far Thymelaea tartonraira (L.) All. in southern Italy are given. The species is here reported for the first time in Basilicata and Calabria

La Sezione Ligia (Fasano) Meisn. del genere <i>Thymelaea</i> P. Miller (Thymelaeaceae) in Italia

Nell'ambito del genere Thymelaeaceae P. Miller (Thymelaeaceae) la sez. Ligia (Fasano) Meisn., nell'accezione proposta da TAN (Notes R. B. G. Edinb., 38:149-164, 1990), comprende sei entità delle quali quattro annuali, tutte afferibili al complesso Thymelaea passerina (L.) Cosson et Germ. e due perenni, entrambe mediorientali e fortemente correlate tra loro. Questa indagine, condotta nell'ambito di ricerche di tipo biosistematico, tassonomico e corologico compiute sull'intera famiglia (URBANI, Tesi di Dottorato, 1989; Taxon 40: 493-495, 1991; Webbia 46(2): in stampa), ha portato alla circoscrizione delle unità sistematiche italiane e della loro distribuzione

Notulae alla checklist della flora vascolare italiana 4: 1413-1417

1413. Marsilea strigosa Willd. (Marsileaceae) 1414. Hypericum androsaemum L. (Hypericaceae) 1415. Anthriscus caucalis M. Bieb. (Apiaceae) 1416. Deschampsia flexuosa (L.) Trin. (Poaceae) 1417. Leersia oryzoides (L.) Sw. (Poaceae

La Flora degli affioramenti calcarei miocenici della Sardegna settentrionale

Nel presente lavoro vengono riportati dati preliminari su uno studio pluriennale della flora di tutta l'area interessata alla successione carbonatica miocenica, che si estende approssimativamente da Sorso-Sennori-S. Lorenzo fino a Uri-Ittiri-Florinas su di una superficie di circa 390 Km2. Tale successione consiste di sedimenti miocenici marini di composizione calcareo-marnoso-arenacea, poggianti sia sulle vulcaniti olicomioceniche che su sedimenti lacustri tufitico-selciferi

Notulae alla checklist della flora vascolare italiana 4: 1418

1418. Cuscuta cesattiana Bertol. (Convolvulaceae

Gli Habitat terrestri costieri e litorali della Sardegna settentrionale: verifica della loro attribuzione sintassonomica ai sensi della Direttiva 43/92/CEE “Habitat”

In this work we talk about coastal and littoral terrestrial habitats and plant communities in Northern Sardinia. We check the right attribution of different plant communities to their habitat type, among those indicated in the Annexe I of the 43/92/EEC Habitat Directive, and the coherence between the Natura 2000 Network and the tested habitat presence in the study area. Finally, some critical examples, regarding either the interpretation or the application of the Habitat Directive, are discussed. In the study area 16 community habitats have been detected, and among them three are priority habitats (1510*, 2250* and 2270*). 15 habitats are confirmed, been mentioned in at least one Natura 2000 formulary, instead, habitat 2220 is here reported for the first time in Northern Sardinia. The presence in the study area of 5 habitats mentioned in Natura 2000 formularies (1310, 2110, 2120, 2240 and 5410) is not confirmed. The percentage of high threatened habitats in the study area (37.5%) is higher than the national one (24%). On the other hand the percentage of low risk habitats in coastal areas of Northern Sardinia (37.5%) is lower than the Italian one (48%). These considerations give priority to the conservation of the coastal and littoral areas in Northern Sardinia. Finally, the discussion of some critical applicative examples bring us to ask for a really needed Habitat Directive Annexe I revision

Chromosome numbers for the Italian flora: 13

In this contribution, new chromosome data obtained on material collected in Italy are presented. It includes the first count for Dianthus carthusianorum subsp. tenorei, Helosciadium nodiflorum, Hieracium hypochoeroides subsp. cilentanum, H. lesimanum, H. scopolioides, H. terraccianoi. In addition, first Italian counts for Crupina vulgaris, Damasonium alisma, and Illecebrum verticillatum are reported