elater
noun
el·a·ter ˈe-lə-tər 
: a plant structure functioning in the dispersal of spores: such as
a
: one of the elongated filaments among the spores in the capsule of a liverwort
b
: one of the filamentous appendages of the spores in the horsetails
Word History
Etymology
New Latin, from Greek elatēr driver, from elaunein to drive
First Known Use
1830, in the meaning defined above