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Webbia
Journal of Plant Taxonomy and Geography
Volume 47, 1993 - Issue 2
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Original Articles

Segnalazione di alcune entità fitogeograficamente significative nell'Appennino Ligure occidentale

Reports on some entities of remarkable phytogeographical interest in the Western Ligurian Apennines

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Pages 245-258 | Accepted 09 Oct 1992, Published online: 14 Apr 2013
 

Riassunto

La realizzazione del tracciato di un metanodotto sulle alture del ponente della città di Genova ha portato alla genesi di litosuoli serpentinosi sui quali il ricupero della flora spontanea si compie con estrema lentezza. Il censimento delle entità pioniere (220 in tutto) ha consentito di individuarne 17 di notevole interesse fitogeografico, di cui ben 10 tra specie e sottospecie endemiche. Si tratta di Minuartia laricifolia subsp. ophilithica, Cerastium utriense, Ononis spinosa subsp. foetens, Euphorbia spinosa subsp. ligustica, Viola bertolonii, Plantago holosteum, Senecio inaequidens, Carduus litigiosus, Centaurea aplolepa subsp. Aplolepa, Robertia taraxacoides, Festuca tracbyphylla, Festuca gracilior, Festuca robustifolia, Sesleria cfr. uliginosa, Agropyron pectinatum, Agropyron tricbophorum, Stipa setigera.

La presenza di ambienti devegetati, se ha condotto ad uno scadimento localizzato ma a volte serio del paesaggio, ha anche consentito la diffusione di forme vegetali rare o comunque a distribuzione localizzata, molto frugali ma, in linea di massima, fornite di doti competitive modeste.

The realization of the lay-out of a methane pipeline on the mountains of the hinterland of Genoa produced many eroded serpentine lithosoils; the colonization from natural flora takes place very slowly. The census of colonizing species (220 in all) has allowed to find 17 entities of remarkable phytogeographical interest: Minuartia larictfolia subsp. ophiolithica, Cerastium utriense Ononis spinosa subsp. foetens Euphorbia spinosa subsp. ligustica, Viola bertolonii, Plantago holosteum, Senecio inaequidens, Carduus litigiosus, Centaurea aplolepa subsp. aplolepa Robertia taraxacoides, Festuca trachyphylla, F. gracilior, F. robustifolia, Sesleria cfr. uliginosa, Agropyron pectinatum, A. trichophorum, Stipa setigera.

Brief information is given about the climate, the geology and the pedology of the territory; accounts are given also of the distribution area and the phytogeographical meaning of these entities.

The present research confirms the importance of serpentine soils as a place of conservation and development for species frugal but who request a low degree of competition among the vegetables.

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