Noun
A
plant
of
the
genus
,
with
a
rosette
of
sessile
leaves
about
10
cm
(
4
")
long
with
a
narrow
part
instead
of
a
petiole
,
and
with
a
spike
inflorescence
with
the
flower
spacing
varying
widely
among
the
species
. ''
See
also
''
psyllium
.