Here is some wild parsnip I saw growing in a field. Actually wild parsnip is just the cultivated parsnip brought from Europe to North America by settlers, which has esccaped from the garden and now grows wild.
Some of this is growing wild in my garden paths and on the edges of my woods on my property, where the lawn or driveway meets the woods.
One thing everyone should know about wild parsnip is that if you touch the leaves with your bare skin then expose it to sunlight you can get a terrible, painful rash. It is said to be a long lasting rash and can cause scarring. The research I did said it must be exposed to sunlight to cause the problem with the skin. There is a lot of information on this topic on the Internet if you want to learn more just google it.
The plants I see now (April) are about a foot high and are in bloom. These can get 2-5 feet tall over the season and do continue blooming as time goes on, I've seen them also blooming in May and June.
Again this is just the cultivated plant whose seed has been released to the wild and is self-sowing. Therefore, the root of this plant is the edible parsnip that we buy in grocery stores!
(Legal disclaimer before eating any wild growing plant educate yourself and check with an experienced wildcrafter.)