Planting Liatris corns...... Is there a right side up ??

I've got a bag of Liatris corns.... too many assorted shapes... I can't
for the life of me, figure out any 'proper' way to plant them.

Some have concave bottoms and a small 'knob' of the top.

Others have tiny fibers "old growth" on the concave side
and 'new' tiny fibers "new growth' on the knobby side. I'm thinking
these are new roots. If they are, then there are roots on two
opposing sides... both concave and knobby....

Still others are knobby all over the place. No tops, no bottoms
just knobby.

Any ideas on which end goes 'up' ??


Also, planting depth is 2" - 4". Any preference to shallower
or deeper, or does it not matter.

Thanks in advance...

Peter