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 two localities in the sierra madre oriental mountains in nuevo león. it grows at moderate altitudes from 2150–2600 m, growing along streamsides in mountain valleys, where moisture levels in the soil are greater than the otherwise low rainfall in the area would suggest.