Grasslands of the order Brometalia erecti Br.-Bl. 1936 on Antiapennine calcareous massifs in central-southern Tuscany (central Italy).

Fiorisuie characten/oties, syntaxomomonsy and synecolagy of grasslands of the order Ro-someto//o erecíl on calcarcaus massifs of centralsssutheno ruseany are repaced Mullicar/ate analysis was uses> so compare 64 phytasoeioisogical relevés made in <he years 1997. 2000 and 2001. These pastures occur in arcas uf the tenoperate oceanie region, with upper hill so montane themootype and lower humid so lowcr hyperhuníid oousobrotype. lo ser/a> comímomoco wish wosuds ouf Osía-a s.-msrp/nmjhlio Scop. and with beecb woods oms summits The plant consmssuniticu surveyed were clasoificol imo sise following assooeiaoions: /3 Cerastio etrusci-Broraetans co-ecli ass naco (Phleo-Rroooíon Biondi & Blasi ex Bisuusdi & sol 1995), idenuilied loor serie grasslands on musosderate nos ssecp siapes with has/e lishasois in the hill and iower montanc belos; /s has twa variants relased tom somil chemosical and phys/cal clsaracters: ctuiosparisoom with sima/lar vegetation of osher Apeno/nc arcas confinois she wessern eon¡oooaoiom¡ amíd automsonosuus ¡¡ature of tese esonimnuoities; u) Troj olio inconmali-Ro-ometaon crec/i Oberdorfer & i-!oufniaon [967 (Rroraion W. Kmocls 1926), koown fromss she Ligurian Apennine downwards; in tbe area studied it shosws a new oíAntiapenmsi¡sies subassocias/on ¡somísoed plmleelemsoons ambigmsi ibas includes: a mesophilous var/ant with Aro-hcnao!ueroon elotius, related to fIat or north-exposcd stations in time oooau¡stain belo linked so onature sss/ls with high nsoisture ah year, rich in transgressive species of <he class Msmlirmiso-Arrhenolhereteo TUscos 1937: mm subnitrophilous var/aol wish Cao-lina carvasbasa, related so grasing and exelus/ve toso/ls wish high clay esumoíponenu: a srans/í/omn var/aol sowards xeu-sopu¡/lous grasslands. Thc ssudy canfirms sbe preseomee of the alliance Ph/ea- Bronmismn o Tuseany as an isolased omppendage with nturtlsem oufposts of xerrmcalcicalous consmunities widcspread in