Helianthus tuberosus

Cutting: fragment of plant (usually a stem) capable of forming roots to make a new plant.

Diaspora: part of a plant that separates from the mother-plant and ensures propagation. This may be a seed, fruit, bud, bulb, etc.

Sucker: a shoot that grows from the root of a perennial plant.

Stubble burning: an ancient agricultural practice that consists of hoeing the superficial layer of grassland, drying it then burning it and spreading the ash across the fields.  The technique has been abandoned today, but the term has remained to describe simple burning techniques.

Waterweed cutting: a technique that consists of cutting and removing reeds and other herbaceous plants growing in ditches, rivers, canals and ponds.  

Indigenous: used for a plant that has colonized the region in question by natural means or due to anthropogenic factors, but in the latter case, established before 1500 AD.

Layer: an aerial stem capable of rooting itself when it comes into contact with the ground and forming a new plant separate from the mother plant.

Nutrients: nutritious elements consisting of the group of organic and mineral compounds necessary to a living organism.

Obsidional: related to the siege of a town.  Used for a plant whose presence is linked to the stationing of troops during armed conflict.

Polemochorous: used for a plant dispersed as a result of armed conflict.

Riparian forest: all the trees, bushes and shrubs that live on riverbanks (synonymous with river or streamside woodland).