[cc]

Can't really be anything else but no tendrils?

[Subversive_plot]

Certainly a pea, but there are some "branches" that look like tendrils with a small leaf on them (?).

I'd let it continue and see how the rest of the plant grows. 

[cc]

Certainly a pea, but there are some "branches" that look like tendrils with a small leaf on them (?).

I'd let it continue and see how the rest of the plant grows.

I would call them buds. Either way not natural.  I have planted out. See what happens.
Meets the definition of odd.