water fir
noun
(In early use) a fir tree, or a plant likened to a fir, growing in or near water; (now) specifically either of two deciduous coniferous trees found in parts of China, Glyptostrobus pensilis and the metasequoia, Metasequoia glyptostroboides.
Origin
Mid 19th century; earliest use found in George Don (1798–1856), botanist and plant collector.