Leo in N E Illinois
The Professor
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the last one, wide open root over rock is a nice example. Very much different from what normally is seen.
But your pictures do show: Most tridents have very strongly haning branches, more often seen in confifers.
Question remains whether this is their natural growth habit, or really a design choice made for this species. And if so, why.
The answer is available if you get out of bonsai websites and look at images from China, North Korea, South Korea, Japan and Taiwan of old trident maples growing in their landscapes. Those are the countries it is native, look for images from those areas that include trident maples. You might also look for 100 year old trees in arboretums and botanic gardens around the world. According to Wikipedia, the trident maple was introduced to Europe and USA in 1896, so in theory you should be able to find European specimens possibly as old as 120 years old give or take. Check your local botanic garden or arboretum. You may be able to see how a mature specimen looks.
A poor start is the Wikimedia page. Note some of the photos are from Korea and Japan.
![commons.wikimedia.org](/proxy.php?image=https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2F6%2F6c%2FAcer_buergerianum_seeds.jpg&hash=392892b45d5f8864382b6b7ca97b31d7&return_error=1)
Acer buergerianum - Wikimedia Commons
From the little surfing I did writing this post, the "natural form" for the trident maple seems similar to the form for Acer rubrum and many of the other north American native maples. Pretty similar to Acer palmatum too. So in all likelyhood the "single trunk pine tree style" you dislike is not a common shape for trees in the wild. An informal broom like shape seems to be the common theme for Acer buergerianum.