Answer: It's actually very easy to identify male and female pumpkin flowers once you know what to look for. Male flowers are attached by a straight stem; female flowers have a slight swelling directly behind the petals so the stem is thicker than those attached to male flowers. This swelling is where a little pumpkin will develop if the female flower is pollinated. Check several flowers (there may be several males or females in a row) and eventually you will see the difference.
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