weak stem
The name of the stem of a plant is called a stalk. If it is soft it is a herbaceous Weak ones are called climbers, and swollen or broken ones are called galls.
It has a weak stem
Pumpkin is a plant that has a long weak stem.
Weak
hibiscus have strong stem
allmanda have strong stem
I imagine that happens because the leaf is old and its stem is weak and can't hold the old leaf.
Yes. Find a picture of one. It also has a weak stem.
Yes. A trunk is not only a stem but it is the main stem of a tree.
The money plant's stem is weak, so it will support itself on strong objects by growing around them.
papaya tree is soft stem