This rare Mexican pine tree was only discovered in 1969 and represents something of a taxonomic enigma, appearing to be a mid-point between the subgenus Strobus ('Haploxylon') and Pinus ('Diploxylon') (3) (5). These pines reach up to 30 metres in height (2), and mature trees have an irregular crown of branches (3). The dark brown bark is thick and deeply fissured, breaking easily into large plates (2); in younger trees the bark is smooth and greyish-green in colour (3). The slender green needles are 6 - 10 cm long and grouped in tufts of 4 - 5 (5). Oblong cones are borne at the ends of the branches, hanging down either singly or in pairs; they mature to a rich yellowish-brown or ochre colour before falling to the ground (3).
- Diameter: 30 - 60 cm (2)
- Height: 15 - 30 m (1)