Dale observes that the red flowered and strong stemmed penstemon have both stamens and pistils in the same flowers.
Strong stemmed penstemon flower with both pistils (sticking out) and the stamen (in the petal shadow). Image by Dale Lindgren
These penstemon plants ___________.
To review this concept go to Flowering Principles: Plants with Perfect Flowers.
If Dale wants the strong stemmed penstemon to be the male parent, he should?