the populations are dioecious
, with unisexual flowers, those on a given plant either entirely male or entirely female).
From the above discussions, it may be concluded the Arthromeris himalayensis gametophytic generation shows some derived developmental features: 1) dioecious
prothalli promotes intergametophytic fertilization (may be of sibling and/or non-sibling mating); 2) archegoniate prothalli that are meristematic and cordate shaped, continuously producing archegonia, increase the chances of sporophyte production; and 3) long-lived gametophytes (more than 110 days) that also promote intergametophytic fertilization.
In Pistachio vera, a commercially important dioecious
plant, DNA segments were amplified with the objective of identifying markers linked to sex determination.
The species is dioecious
, though hermaphrodites do exist (Gleason and Cronquist 1993).
Researchers fear potential cross-pollination between monoecious and dioecious
hydrilla in areas where both biotypes grow together.
-those which have sexes on different plants and therefore require a male to pollinate the fruit-bearing female -include Hippophae rhamnoides, Aucuba japonica and Vibrunum davidii, while trees and shrubs that bear ornamental fruit without needing two plants include Arbutus unedo,crataegus,malus, sorbus, pyracantha,cotoneaster,euonymus and berberis.
For a fabulous display of purple fruits, you need tog row a male variety near Gaultheria mucro-nata `StagRiver' Other dioecious
(those which have sexes on different plants and therefore require a male to pollinate the fruit-bearing female) include Hippophae rhamnoides, Aucuba japonica and Vibrunum davidii, while trees and shrubs that bear ornamental fruit without needing two plants include Arbutus unedo,crataegus,malus, sorbus, pyracantha,cotoneaster,euonymus and berberis Is there any way we can tell a female from a male plant?
Some of the most preferred species (Populus and Salix) are dioecious
, that is, the male and female reproductive organs occur on different individuals.
(separate sexed) species, there are separate male and female versions of the same plant.
A number of selected cultivars are dioecious
(individual trees are male or female, but not both).
I was once chatting with an attractive Arapesh woman of my own age -- we were both about 40 at the time -- when the question arose as to why some papaya trees (a dioecious
species) bear fruit, while others don't.
Most species of precious coral are uni-sexual or dioecious