These red stringy things are Aerial Roots. I saw this on an Ohia tree in the Volcanos National Park and I asked a park ranger what it was. She said that the tree’s natural root system was under stress, maybe it was damaged or maybe there was just not enough rain. Keep in mind that trees in the park grow in lava gravel. Very good drainage, maybe too good. So, when a tree senses that it is in trouble it sends out additional aerial roots high up on the trunk. This Ohia tree is in our yard, too close to the driveway I think.
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