A curious aspect of sexual evolution of Cannabis under domestication has to do with the fact that humans have turned a normally dioecious
species into forms that are monoecious.
As Arthromeris himalayensis produces dioecious
prothalli, it does not resemble any type as recognized by Masuyama (1975b), though the antheridia located on the lower half of the wings (type LW) as proposed by Masuyama (1975b).
Polymorphism of 13 loci were reported out of 20 putative loci when 12 enzyme systems were studied from the dioecious
ripacian tree Populus euphratica to detect polymorphism of 3 populations.
The plants are dioecious
, with separate male and female trees.
Venustaconcha ellipsiformis, a dioecious
species, were collected at least monthly between January 2006 and October 2006.
Ants also were frequent floral visitors and potential symbionts, though they are unlikely pollinators of this dioecious
Because the shrub is dioecious
, you will need to have male and female plants to get the orange berries.
(separate male and female plants) tree species is highly threatened by an introduced insect for which there is currently no control.
Date palms are dioecious
, which means that trees have either male or female flowers but not both.
A monoecious form--that is, with both male and female flowers on the same plant--appeared in the mid-Atlantic states years after the dioecious
biotype was found in Florida.
In the new work, the objects Edmier has cast are hefty cycads, dioecious
tropical plants--in other words, each plant is gender specific, either male or female.
They are dioecious
( the males and females flower on separate plants but only the females bear the hop cones required in the brewing process.