00997nas a2200133   4500008004100000245006100041210005900102260001200161300001400173490000700187520053500194100001700729856011700746       2012                        eng d00aNew site of isoëtes echinospora (isoëtaceae) in Poland0 aNew site of isoëtes echinospora isoëtaceae in Poland  c2012///  a185 - 1880 v193 aIsoëtes echinospora Durieu is a very rare species in Poland. In 2009, it was found in Lake Okońskie in the eastern part of the Pomeranian Lakeland (NW Poland). This is the ninth locality of this species in Poland. It was found at a depth of 0.1-1.0 m. The water is acidic and poor in dissolved salts, including calcium salts, but quite rich in humic substances. The population of I. echinospora is relatively numerous. The individuals form aggregations or occur together with other isoetids (I. lacustris and Lobelia dortmanna).1 aRekowska, E.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84865174622&partnerID=40&md5=467e40749c3d822889f68937a6a8f18f