Foamy Illusion

See the peaks of frothy foam,
so plentiful--it's seasonal.
beneath a sky, blue August dome,
ocean scene: seems reasonable.

But it's Wisconsin, no sea here,
and still the lacy peaks prevail.
It seems to happen every year,
and few can name its frothy sail.

Festooned with green the roadside brush,
decorated as for a ball,
when sunflower, and corn are lush,
snowy peaks strive to top it all.

Summer foliage, upholstered green,
changed suddenly as while we slumber,
the foam on waves so white is seen,
what can it be?--wild cucumber.