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Toyon
Heteromeles arbutifolia
36.7783, -119.418
Field Notes
Description:
The pulp of immature fruits contains a toxic cyanogenic glucoside that protects developing fruits from bird predation. As the fruit ripens, the cyanogenic glucosides gradually shift out of the pulp and into the seed, pulp carbohydrate levels increase, and fruits turn from green to bright red. The fruits become more attractive to birds as they ripen, and bird dispersal of the seeds is encouraged. Subsequent seed predation is prevented by the localization of cyanogenic glycosides in the seeds.
Habitat:
foothills of mt diablo.
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