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Term Definition
Buttress An outgrowth at the base of a tree trunk thought to support trees when they grown on unstable soil or on steep slopes. Buttresses and bole of a tree. Drawing by B. Angell.
Endocarp buttress A raised, somewhat rounded ridge running the length of the endocarp in the fruits of species of . Cross-section of the hypanthium of Grias cauliflora. Photo by C. Carollo.
Flying buttress Buttress of a tree trunk that is elevated above the ground. Compare with plank buttress and running buttress. Flying buttresses. Photo by S. A. Mori.
Plank buttress A flattened, board-like buttress. Plank buttresses. Photo by C. A. Gracie.
Running buttress A thick, rounded buttress that extends along the ground several meters or more from the trunk. Compare with flying buttress and plank buttress. Tree of Caryocar glabrum. Photo by C. A. Gracie.