Squash blossems

Squash blossems

I have had more blossoms on my summer squash plant than I can count, but no fruit. I got a book yesterday that describes how to pollinate the blossoms yourself, showing the differences between the male and female plants. It says the females have a swelling behind the flower. Well, I don't see any swelling on any of the flowers. Is there such a thing as an all male plant? What's the deal here?
lemon verbena help!

lemon verbena help!

HUGE caterpillar, what is it?

HUGE caterpillar, what is it?

Happy Labor Day

Happy Labor Day

The “Heart” of the Canna

The “Heart” of the Canna

Custom curtains??

Custom curtains??

Garden Inspiration?

Garden Inspiration?