where …

branchlets droop, cones=long (10-15 cm) (4-6 in)
🇳🇴 Norway spruce  Picea abies

some branchlets droop, others splay horizontal;  needles | very sharp
Colorado blue spruce  Picea pungens

buds and twigs=hairless;  needles=blue-green
white spruce  Picea glauca

buds and twigs=hairy;  needles=blunt-pointed, short (<1 cm) (<½ in)
black spruce  Picea mariana

buds and twigs=hairy;  needles=medium (>1 cm) (>½ in)
red spruce  Picea rubens

Learn more about spruce genus Picea (Picea spp.)

Part of 🌲︎ cedar / fir / hemlock / larch / pine / spruce  family Pinaceae.

Uses by native peoples
(Ethnobotany database)

Picea hosts caterpillars of 158 species
of butterflies and moths, in some areas.

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