Fasciation
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Fasciation, also known as cresting, is a relatively rare condition of abnormal growth in vascular plants in which the apical meristem, which normally is concentrated around a single point and produces
Wyethia helianthoides or mule's ear wildflower (on right) showing fasciation
A "crested" saguaro cactus (Carnegiea gigantea), resulting from fasciation, located at Saguaro National Park (West), Arizona, U.S.
A "cockscomb" strawberry (Fragaria × ananassa)
An example of fasciation, or "cresting," on a coneflower (Echinacea).
Witch's broom
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Witch's broom or witches' broom is a deformity in a woody plant, typically a tree, where the natural structure of the plant is changed. A dense mass of shoots grows from a single point, with the resul
Fasciation
…Phyllody Witch's broom White, Orland E. (1945). "The Biology of Fasciation". Journal of Heredity. 36: 11–22. doi:10.1093/oxfordjournals.jhered.a105409…
Witch's brooms on downy birch, caused by the fungus Taphrina betulina
Witch's broom on a white pine
Witch's broom in Yamaska National Park, Québec