How to Model a Mushroom shape? Is there any good way to make a half decent mushroom?  

I'm specifically trying to make the mushroom on the back of Parasect for an animation. How can you make a rounded cone? Is there an addon for that, or do I have to make it myself?

Specifically, I'm thinking of a cross between an ovoid three-dimensional shape and a cone. 

(It's also a good question when you are making rounded nose cones for objecs such as rockets)
If a Screw Modifier isn't already enough, simple Polygon modelling will be surely.


add a 5 (or more..) sided circle
extrude up and scale to give hints of the shape
then stick a subsurf modifier on it
(optional) then use a lattice or a curve modifier for deformation. Deform to taste.




The lattice:



The Curve Modifier: