Reproduction and Growth
Roystonea regia produces unisexual flowers that are pollinated by animals. European honey bees and bats are reported pollinators. Seeds are dispersed by birds and bats that feed upon the fruit.
Seed germination is adjacent ligular—during germination, as the cotyledon expands it only pushes a portion of the embryo out of the seed. As a result, the seedling develops adjacent to the seed. The embryo forms a ligule, and the plumule protrudes from this. Seedlings in cultivation are reported to begin producing a stem two years after germination, at the point where they produce their thirteenth leaf. Growth rates of seedlings averaged 4.2 cm (1.7 in) per year in Florida.
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