The H. ovalis from Antigua was found beside a
dredged channel, possibly introduced during dredging or another
maritime activity. Although H. stipulacea appears to be dispersing
in the Caribbean and was found around several islands, it was
looked for, but not seen, in Antigua (Willette and Ambrose, 2009);
the H. ovalis population we discovered in 2009 was apparently not
found during their 2007–08 survey. The discovery of H. ovalis in
Antigua suggests the species’ capacity for dispersal, either natural
or anthropogenic. Interestingly, both species are dioecious, meaning
that both seeds or male and female plants would need to be
transported to establish a viable, sexually reproducing population
The H. ovalis from Antigua was found beside a
dredged channel, possibly introduced during dredging or another
maritime activity. Although H. stipulacea appears to be dispersing
in the Caribbean and was found around several islands, it was
looked for, but not seen, in Antigua (Willette and Ambrose, 2009);
the H. ovalis population we discovered in 2009 was apparently not
found during their 2007–08 survey. The discovery of H. ovalis in
Antigua suggests the species’ capacity for dispersal, either natural
or anthropogenic. Interestingly, both species are dioecious, meaning
that both seeds or male and female plants would need to be
transported to establish a viable, sexually reproducing population
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