Three structurally preserved conifer ovulate cones are described from the Pliocene sediments of Ch'ijee's Bluff on the Porcupine River, near Old Crow, Yukon Territory. Cones are ovoid to conical, symmetrical, 3.4-4.4 cm and 2.8-3.4 cm wide. Ovuliferous scales are woody, 2 cm long and 1 cm wide, with a minute dorsal umbo. Bracts are 6 mm long, lack an abaxial lobe and contain a single terete trace accompanied by two resin canals. The pith is parenchymatous with few scattered sclerenchyma cells near its outer margin. Vascular tissue consists of a continuous cylinder of secondary xylem with few resin canals. The inner cortex is parenchymatous and contains between 12 15 resin canals of uniform diameter. The outer cortex is also parenchymatous with a thin layer of sclerenchyma at its outer edge. Vascular tissues in the ovuliferous scale and bract originate as single, continuous cylindrical strands from the axis stele and diverge in the outer cortex. The abaxially concave ovuliferous scale trace splits into separate vascular bundles that alternate with resin canals in the most distal sections. Paired ovules on the ovuliferous scales are smooth, elliptical in shape, 2.7-3.9 mm long and 2.1-2.5 mm wide. Seed wings are detachable, 16 mm long and have a basal parenchymatous pad. Some megagametophyte tissue is preserved however, no embryos were found. Fossils were compared to extant species of Pinus Section Pinus and most closely resemble those of Pinus contorta Dougl. ex Loud. Symmetrical cone shape, non-reflexed cone base, flattened apophyses, cone serotiny and seed wing length distinguish the fossil cones from the extant subspecies and fossils of P. contorta. The fossil cones will be described in a new species of Pinus, Subgenus Pinus, Subsection Contortae.

Key words: fossil conifers, Pinaceae, Pinus contorta, Pliocene, Yukon Territory