> Possibly bulbs that "push" themselves out of the soil evolved in situations
> of highly mobile soils, such as dunes or repeatedly flooded zones, and this
> strategy keeps the bulb at an optimal level where it will not be buried too
> deeply and have to expend too much stored energy extending its leaves and
> scape to the increasingly distant surface.
I have a couple of interesting photos that nicely illustrate the adaptation
of Hymenocallis to growing on dunes. I can't post to the PBS wiki
yet but would be glad to send copies to anyone interested.
Regards,
Phil Andrews
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