Are Extraterrestrial's pagoda trees plausible?

In the National Geographic mini-series Extraterrestrial or Alien Worlds, they featured a hypothetical gas giant moon called the Blue Moon. The Blue Moon orbits a binary star, has a very dense atmosphere with lots of carbon dioxide and oxygen, and a slightly lower gravity than Earth.

The Blue Moon's landscape is dominated by giant plants called "pagoda trees":

Instead of drawing up water from the ground and having to pump it upwards, the pagoda trees collect rainwater in "sky-ponds", and are interconnected so that they do not collapse. Because they can just let gravity do its job, they can grow very high, up to 1 kilometre in fact.

My question is: Could trees that collect water like this grow to be 1 kilometre tall? Are there any other inaccuracies or implausibilities with these plants, perhaps in relation to the atmospheric conditions given?

posted over 5 years ago

SealBoi‭

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