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Roots

root structural type

Classification based on position and origin.

aerating or knee	Vertical or horizontal aboveground roots.
buttress	Roots with board-like or plank-like growth on upper side, presumably a supporting structure.
fascicled	Fleshy or tuberous roots in a cluster.
fibrous	With fine, threadlike or slender roots.
moniliform	Elongate roots with regularly arranged swollen areas.
pneumatophorous	With spongy, aerating roots, usually found in marsh plants.
prop	Adventitious, supporting roots usually arising at lower nodes.
tap	Persistent, well-developed primary root.