IIRC Western Hemlock has flat needles of varying length on the same twig, whereas yew needles are of more uniform length. Hemlock's top growth shoot flops over.
"Spruces needles are in singles (Sitka's spikey, Norway's not)
Pine needles are in pairs
Fir needles are flat
Helmlock needles are short, medium and long.
Yew will kill you".
NS
