EKSPLORASI DAN IDENTIFIKASI PURUN DANAU (Lepironia articulata) LOKAL SEBAGAI ADSORBEN ALAMI PADA IKLIM TROPIKA LEMBAB DI KALIMANTAN TIMUR

Purun is one of the endemic plants that naturally grows wild in peat and swamp areas. commonly found areas Indonesia, including East Kalimantan, especially Kabupaten Kutai Kertanegara. belongs to Cyperaceae family. This plant a typical land. Swamp land for long time during year always saturated with water or inundated. lives swamp, tidal river are acidic sulphate.There three types purun known namely danau, tikus bajang. The danau (Lepironia articulata Retz. Domin.) has fundamental difference when compared bajang, which much larger size than bajang leaves tougher like woody more clearly lined other. also cavity similar bamboo stick. objectives study were 1. determine character natural humid tropics habitat; 2. Knowing characteristics habitat. research design used this descriptive research. results showed that: morphological was form cylindrical stem pipe grew elongated tapered tip, had thin partitions filled inside, bulkhead solid at base shiny green. outer part white covered shaped reddish brown sheath. end then into compound flower will contain many seeds generative phase. flowers located stem. roots fibrous grow stolons. habitat characterized by presence water, either stagnant flowing varying heights (between 100 cm 300 cm). In addition soil pH conditions (4.10-5.20) open without shade. adapting well acid sulphate soils, able absorb heavy metal elements such as Pb, Cd Zn.