Abstract
A program of artificial pollinations has demonstrated that Podophyllum peltatum L. (Berberidaceae), the may apple, is, locally at least, selfincompatible, not agamospermic, and dependent upon pollen transferred between populations mainly by species of Bombus to effect the production of mature fruit and seed. The experimentation has also provided the evidence to show that optimum seed set results from cross-pollinations which take place 48 hours after anthesis, apparently.

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