A culm was originally a stem of any type of plant. It is derived from a Latin root, culmus. It is now used mostly in its more technical botanical sense, where it specifically refers to the above-ground or aerial stems of grasses (Poaceae; including bamboos) and sedges (Cyperaceae).
Culm (city) - Chelmno
Culm was the old German name for a place in the former West Prussia. It is now known by the Polish: Czarze.