marsilea crenata, a species of fern found in southeast asia

marsilea crenata flora plants botany ferns species vegetation nature ecology habitat biodiversity ecosystem classification morphology diversity environment distribution characteristics natural research reproduction growth types native area conservation cultivation traditional use pharmacology pharmacognosy phytochemistry biological activities medicinal properties pharmacological effects resources benefits healing active compounds chemical constituents extracts bioactive drug interactions toxicity utilization exploitation aquatic freshwater habitats pteridophytes fern found southeast asia plant looks like four-leaf clover