plant stem
structural axis of a vascular plant, supporting leaves, flowers and fruits
rhizome
underground stem in which various plants asexually reproduce via budding.
culm
above-ground stem of a grass or sedge
caudex
biological structure in a plant stem
trunk
main wooden axis of a tree
peduncle
the stalk of a plant bearing an inflorescence or solitary flower
stipe
in plants, stalk that supports some other structure
branch
part of a tree; a shoot axis that develops from an axillary bud meristem or from equal divisions of a meristematic apical cell
straw
stem of a grass
phylloclade
flattened, photosynthesizing plant shoot
pedicel
structure connecting flowers or fruit to the main stem of a plant
tiller
stem produced by grass plants