Had some trouble after I duplicated the interior face and removed some vertices, prior to extruding the stem.
I also attempted to add a subdivision modifier after and the top most face turned into a spike ; very weird.
I attempted to do the extrude immediately after duplicating the face and then removing geometry but it wasn’t looking correct.
I’m assuming it is acting weird due to not applying the transforms and scale…so ill have to do another pass and try after I applied the transforms to see if i get the spike problem again.