<Ul> <Li> "Asparagus fern"--This may apply to one of several species of the monocot genus Asparagus, which are flowering plants . </Li> <Li> "Sweetfern"--A flowering shrub of the genus Comptonia . </Li> <Li> "Air fern"--A group of animals called hydrozoan that are distantly related to jellyfish and corals . They are harvested, dried, dyed green, and then sold as a "plant" that can "live on air". While it may look like a fern, it is merely the skeleton of this colonial animal . </Li> <Li> "Fern bush"--Chamaebatiaria millefolium--a rose family shrub with fern - like leaves . </Li> </Ul> <Li> "Asparagus fern"--This may apply to one of several species of the monocot genus Asparagus, which are flowering plants . </Li> <Li> "Sweetfern"--A flowering shrub of the genus Comptonia . </Li> <Li> "Air fern"--A group of animals called hydrozoan that are distantly related to jellyfish and corals . They are harvested, dried, dyed green, and then sold as a "plant" that can "live on air". While it may look like a fern, it is merely the skeleton of this colonial animal . </Li>

Where do many plants in the phylum polypodiophyta live