Linked from
The 35 pages that link to Dioecy, each with the reason it gives.
Sexual dimorphismRelated: Separate male and female plants can differ in growth, form, and resource allocation.
Date palmRelated: Date palms have separate sexes, so orchards need pollen from male trees.
PopulusRelated: Most Populus species are dioecious, making sex determination a research focus.
SalicaceaeRelated: Willows and poplars commonly separate pollen-producing and seed-producing flowers among individuals.
Ginkgo bilobaRelated: Ginkgo trees are male or female, so seed production depends on nearby pollen sources.
Juniperus communisRelated: Common juniper plants are usually male or female, so cone production depends on sex.
PodocarpaceaeRelated: Many podocarps bear male and female reproductive structures on different trees.
SalixRelated: Most willow species bear male and female flowers on separate plants.
Juniperus virginianaRelated: Eastern redcedar commonly bears pollen cones and seed cones on separate trees.
Taxus baccataRelated: Yew trees are usually male or female, so seed production requires nearby pollen.
Araucaria araucanaRelated: Male and female cones are usually borne on separate Araucaria araucana trees.
Salix albaRelated: Male and female flowers occur on separate white willow trees.
TaxusRelated: Many yew species have separate male and female plants, affecting seed production in cultivation.
PandanaceaeRelated: Many Pandanaceae species bear male and female flowers on separate plants.
Rafflesia arnoldiiRelated: Successful pollination requires male and female Rafflesia flowers to bloom close together.
Borassus flabelliferRelated: Male and female flowers grow on separate Borassus flabellifer trees.
HollyRelated: Many holly species have separate male and female plants, affecting fruit production.
Juniperus scopulorumRelated: Rocky Mountain juniper plants are usually male or female, shaping seed production.
PandanusRelated: Many pandanus species bear male and female flowers on different individuals.
Populus trichocarpaRelated: Black cottonwood has separate male and female trees, shaping pollen and seed production.
DiospyrosRelated: Separate sexes occur in many Diospyros species and affect fruit production.
FraxinusRelated: Some ash species separate male and female flowers onto different trees.
Ilex aquifoliumRelated: Holly plants are generally male or female, so fruiting depends on female plants and pollination.
Juniperus deppeanaRelated: J. deppeana is generally dioecious, so pollen-producing and seed-producing cones occur on different trees.
Maclura pomiferaRelated: Osage orange has separate male and female trees.
Populus tremulaRelated: Aspen trees are male or female, so reproduction requires pollen transfer between individuals.
Populus tremuloidesRelated: Individual quaking aspens bear flowers of one sex, rather than both.
Salix nigraRelated: Black willow has separate male and female trees.
SerenoaRelated: Serenoa repens bears male and female flowers on separate plants.
Urtica dioicaRelated: The species name points to its commonly separate male and female plants.
Zanthoxylum piperitumRelated: Sex-separated plants affect fruit production in cultivated sanshō.