They’re adventitious roots. Perfectly normal, especially in a humid atmosphere.

Phew!! Thank you. I was getting a bit neurotic.

If you don't like their appearance, you can remove them w/o harming the plant.

Tip: If you decide to remove them, sooner is better because in order to grow, the plant will necessarily devote food/energy resources that could be put to better use elsewhere.

Al

The fact that these roots grow easily on Schefflera is a clue to how easy they are to propagate. If you want more, cuttings are a cinch.

the plant is leaning significantly .... and is huge ... it might be time to start a new one.. and get rid of this old beast ...

when is the last time it was repotted .. media does wear out .. and repotting such a huge plant is not easy ...

if it were mine.. and understanding it is going to become a problem in the next few years.. i would start a few new ones.. and get them going.. and then make a decision on the momma plant ...

watch a few of the vids at the link below to understand how easy it will be

tongue in cheek.. i dont know if i should respond to this: I was getting a bit neurotic.

so i wont.. lol ...

ken

https://duckduckgo.com/?q=schefflera+propagation&t=ffcm&iax=videos&ia=videos

btw.. if you turned the plant once a month or so... it wouldnt have developed the lean .. in theory anyway ....