When people say to study living trees in regard to styling.... are we talking about the standard, undisturbed, ideal version of a tree?
Or are we talking about studying pictures of those that have been... disturbed... in some way.
I ask because looking at the ideal growth of any particular tree is usually not very bonsai friendly or interesting, aside from the Junipers I knew in Colorado.
When it comes to form there are two major factors at play, genetics and stimuli.
Genetics are the blueprints for growth pattern, stimuli affect how they are expressed.
There aren’t any truly undisturbed mature trees. All experience damage/loss. Whether from some external force or self pruning.
“Standard form”, suggests a tree expressing its genetic blue prints relatively undisturbed. Often younger trees or those in full sun in a favorable location. Park trees, etc.
Ideal tree form is subjective depending on what a persons goals are. Ideal forest trees that I assess for work are tall, very straight, low taper, and branchless for their bottom halves or more. Pretty much the opposite of what most would consider ideal for bonsai.
I reference studying wild trees in some of my threads. What I mean is that people should see them in person if possible, numerous forms in different places. Study all. Identify features/forms common to a species or genus. Supplement these observations by reading about the trees too. The USFS provides decent species data sheets. State organizations are also likely to provide good reading.
Try to figure out why the trees appear as they do.
Eg. Park trees look like park trees because they face little competition for light, generally are pruned from below, treated for pests, and may be watered regularly. Studying this “standard form” can help piece together a trees genetic blue prints (how they want to grow vs how they have to grow.)
Forest trees look different. They appear less tamed and express how a species has to grow when faced with competition and affected by other stimuli. They usually are narrower, taller, and more damaged.
To really elevate understanding of form it is crucial to learn about
why certain features and shapes develop. What causes them? Knowing the why provides context to form. Understanding context helps one style a tree into a more believable design.
There are some features that are relatively uncommon in bonsai because without context they are considered flaws or just ugly. But when one understands what a tree went through to form them, these unsavory features may suddenly appear beautiful.