stani gismu

x1 is a/the stalk/stem/trunk [body-part] of plant/species x2; [metaphor: main support].

See also tuple, mudri.

In notes:

mudri
x1 is a quantity of/is made of/contains wood/lumber from tree(s) of type/species x2.
tuple
x1 is a/the leg [body-part] of x2; [metaphor: supporting branch].
cmastani
c1=s1 is a/the sprout/shoot of plant/species s2 by standard/norm c3.
gejystani
x1 is a rhizome/rootstalk of plant/species x2.
jesystani
s1 is a thorn of plant/species s2
stanycma
c1=s1 is a/the sprout/shoot of plant/species s2 by standard/norm c3.
stanyxruba
x1 is a quantity of rhubarb of species/strain x2.
tu'uspa
x1 is a vascular plant
stori
x1 [body-part] is the upper/normally exposed part(s) or region(s) of a plant or sedentary organism (stalk/stem/trunk, branches, leaves, flowers, fruit; not root, bulb, or burrowing parts), belonging to plant x2.
torso
x1 is the torso (part of body excluding head and limbs) of x2