Page 15 - escursioni_A
P. 15

Itineraries
                    Also the chasmo-chomophytic and epiphytic moss- and fern-commu-
                 nities (POLYPODIETEA) are well represented with the association Ano-
                 grammo leptophyllae-Selaginelletum denticulatae (POLYPODION SERRATI).
                    The  chasmophytic  vegetation of  local  undisturbed  base-rich
                 rocky cliffs  (DIANTHION  RUPICOLAE)  is  ascribed  to  Bupleuro
                 dianthifolii-Pseudoscabiosetum limonifoliae at Marettimo and to Sca-
                 bioso creticae-Centauretum ucriae elsewhere; several subassociations
                 characterised by local narrow endemics are recorded in this area, i.e.
                 helichrysetosum straminei at Zingaro, ericetosum siculae at Mt. Cofano,
                 brassicetosum drepanensis on the top of Zingaro Mts., brassicetosum ma-
                 crocarpae on Egadi Islands. Plenty of interesting plants may co-occur
                 on the same site, not only the above-mentioned narrow endemics, but
                 also Sicilian endemics like Anthemis cupaniana, Cymbalaria pubescens,
                 Helichrysum panormitanum subsp. latifolium, etc., circum-Tyrrhenian
                 endemics such as Asplenium petrarchae subsp. petrarchae, Convolvu-
                 lus cneorum, Dianthus rupicola subsp. rupicola, Glandora rosmarinifolia,
                 Hyoseris taurina, Iberis semperflorens, Senecio cineraria subsp. bicolor, Se-
                 seli bocconei, etc., and other very rare plants like Phagnalon metlesicsii,
                 only occurring on Mt. Cofano and at Lanzarote in Canary islands.
                    Several communities  linked to rock crevices  (ASPLENIETALIA
                 LANCEOLATO-OBOVATI), such as Phagnalo saxatilis-Cheilanthetum
                 maderensis and Cosentinietum bivalentis occur at Levanzo and Maret-
                 timo, while the chasmo-nitrophilous vegetation of disturbed rocky
                 cliffs and stone walls (CYMBALARIO-PARIETARIETEA DIFFUSAE)
                 is locally represented by numerous communities referred to CYMBA-
                 LARIO-ASPLENION (e.g. Sedo dasyphylli-Ceterachetum officinarum)
                 and  ARTEMISION ARBORESCENTIS-CAPPARIDION  SPINOSAE
                 (Capparidetum rupestris, Centranthetum rubri, Hyoscyamo albi-Parieta-
                 rietum judaicae and Antirrhinetum siculi).
                    The  pioneer assemblages  typical to local  screes  (Sedo  sedifor-
                 mis-Centranthetum rubri), rather common on Mt. Inici, Mt. Sparagio,
                 Mt. Palatimone, Mt. Monaco, Marettimo island, belong to the ende-
                 mic alliance EUPHORBION RIGIDAE.

                    Hydro-hygrophilous vegetation
                    The streamlets of the locality called ‘Acci’ (= Apium in Sicilian
                 dialect) in the northern part of Zingaro reserve host several hy-
                 grophilous communities dominated by few rhizomatous helophites


                 64
   10   11   12   13   14   15   16   17   18   19   20