The colour of a Scots pine is variable; some trees may be blue-green while others are yellow-green. The needles appear in clusters of two, are usually twisted and are about four to eight centimeters long. The bark on the upper portion of the stems is orange or orangeish-brown and is smooth to the touch. Closer to the trunk it is a greyish or reddish-brown and the trunk is often fissured in scaly plates. The cones grow both singly and in groups of two to three and are up to eight centimeters long. They are usually yellow-brown and contain tiny prickles on the cone scales.