Pronunciation /pəˈl(j)uːd(ə)l/ /ˈpal(j)ʊd(ə)l/
(of a plant, animal, or soil) living or occurring in a marshy habitat.
Early 19th century from Latin palus, palud- ‘marsh’ + -al.
Cattails were, in my youth, a good indicator of a paludal area. Common Reed (genus Phragmites), a very invasive plant, has overtaken such spaces.