Picea martinezii, the Martinez spruce, is a medium-sized evergreen tree growing to 25–35 m tall, and with a trunk diameter of up to 1 m. It is native to northeast Mexico, where it occurs at six localities in the Sierra Madre Oriental mountains in Nuevo León.

The leaves are needle-like, 23–35 mm long, stout, moderately flattened in cross-section, bright glossy green with inconspicuous lines of stomata; the tip is viciously sharp.

They have stiff, smoothly rounded scales 2-2.5 cm broad, and are green, maturing pale brown 6–8 months after pollination.

Martinez spruce was only discovered in 1981, and is critically endangered with just six small populations, comprising about 1,000 trees.

[2] Fossil evidence shows it had a wider distribution in the past, south to central Mexico.