lol, Cipriano, you're adorable   

!
Just an update, I was down around the forestry lands again and messed around a bit with the tulip-poplar...  Hillbilly, Pat, you're right on.  Lots of problems with these shoots...  one, they aren't as straight as you'd think, kinda the zig-zag growth pattern at each leaf-node.  Two, they grow so fast that second-year wood is too thick for arrows.  I did harvest a couple shafts to mess with, but there are TONS of better species around here to use.  On this trip I found a gold-mine of black cherry and red maple shafts to keep me busy until fall.... then I'm back into my multi-flora rose patches!   

Thanks for the replies, guys!!!
Here's some pics:

Some young shoots
 
 If you look close, the middle of my hand is at about the point of this year's new growth, the width of my finger is nearly 3/4" thick for comparison.

cross section of new growth, lots of pith