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Leaves binate, from 10 to 20 cm. long, stout and rigid; resin-ducts medial, hypoderm multiform, the inner cells gradually larger, remarkably large in the angles of the leaf.

The spikelets are oblong, acute, binate, one pedicel being shorter than the other, usually appressed to the rachis and not spreading.

But in my variety the increase of the number of the leaflets may extend to these primary organs, and make them binate or even ternate.

Its short binate leaves, the persistent long prickles of its cone, and its tough branches, combine to distinguish this Pine from its associates.

It is recognized by its smooth branches, binate leaves and numerous, often multiserial, clusters of persistent, often closed, cones.