01299nas a2200145   4500008004100000245009800041210006900139300001000208490000600218520077500224653006300999100002001062700002101082856005001103       1994                        eng d00aCentrolepidi-Hydrocotyletea alatae, a new class of ephemeral communities in Western Australia0 aCentrolepidiHydrocotyletea alatae a new class of ephemeral commu  a55-620 v53 aIn Western Australia - a relatively arid portion of the continent - wet environments are only occasionally vegetated, but well-developed communities occur in winter-wet habitats in sandplain depressions, along water courses and on rock (mostly) granite outcrops. These communities are composed of small-sized annuals, mostly belonging to the Centrolepidaceae, Asteraceae, Cyperaceae, Juncaginaceae, and Stylidiaceae. Multivariate analysis was carried out on 46 phytosociological relevés; four associations are recognized with a distinct floristic composition and ecology. Species occurring in this vegetation are mostly therophytes (66%) and many are endemics; a new vegetation class Centrolepidi-Hydrocotyletea alatae, endemic for Australia, is proposed and described.10aendemism, rock outcrop, Sandplain, syntaxonomy, therophyte1 aPignatti, Erika1 aPignatti, Sandro  uhttps://juncaginaceae.myspecies.info/node/276