Hi Mel - not much good at formal ID, but if you can bend it around your wrist without it cracking (this goes for other hedgrow finds too) you can use it (after letting it 'rest' under a hedgrow for a couple or 3 weeks after cutting). If it does crack, it'll still be great for living willow stuff (fedges, domes etc). Dont know if you youve got any guidance, but courses aside ( I have learnt so much on odd days with Blithfield Willow Crafts) I love 'Handmade baskets from natures colourful materials' by Susue Vaughan. Thanks for reminfding me that these dormant days are precious and I need to get out there and cut!!!