On 4 Dec 2000 13:28:03 GMT, una at mars.its.yale.edu (Una Smith) wrote:
It might well be the first tree on earth, you're not well informed.
>Anyway, the sex of cultivated Ginkgo trees in North America is quite
>irrelevant because these trees are not part of a breeding population.
That's just the point:
Ginkgo trees have either male or female gametophytes, but not both.
Landscapers plant only male trees, and that's why the species can't
survive in the wild - not enough females.
>talulah1 at my-deja.com writes:
>>> Who gives a you-know-what if the Ginkgo is a "native" or not!!! It
>>IS one of the oldest trees known to man
>>No, it isn't.
>>Ginkgo biloba is special because it is the sole remaining species of
>a group that was once far more diverse. That group diverged from its
>closest living (i.e., extant) relatives about 350 million years ago.
>>Anyway, the sex of cultivated Ginkgo trees in North America is quite
>irrelevant because these trees are not part of a breeding population.
>>--
> Una Smith una.smith at yale.edu>> Department of Ecology and Evolutionary Biology
> Yale University
