bran - broken husks of the seeds of cereal grains that are separated from the flour by sifting

plant material - material derived from plants

sheath, case - an enveloping structure or covering enclosing an animal or plant organ or part

cornhusk - the husk of an ear of corn

hull - dry outer covering of a fruit or seed or nut

cod, pod, seedcase - the vessel that contains the seeds of a plant (not the seeds themselves)

bract - a modified leaf or leaflike part just below and protecting an inflorescence

remove, take away, withdraw, take - remove something concrete, as by lifting, pushing, taking off, etc. or remove something abstract; "remove a threat"; "remove a wrapper"; "Remove the dirty dishes from the table"; "take the gun from your pocket"; "This machine withdraws heat from the environment"