sphenophyte
English
Etymology
From
spheno-
(
“
wedge
”
)
+
-phyte
(
“
plant
”
)
.
Noun
sphenophyte
(
plural
sphenophytes
)
Any of an ancient type of
simple
vascular
plants
of which only the
horsetails
remain which have
hollow
stems
that
produce
spores