Common Name: PINE FAMILY
Habit: Shrub, tree, evergreen; monoecious. Stem: young crown conic; twig not grooved, resinous, generally persistent. Leaf: simple, generally alternate, sometimes in bundles or appearing +- 2-ranked, linear or awl-like; base decurrent, woody or not, persistent several years. Pollen Cone: generally < 6 cm, not woody, deciduous. Seed Cone: generally woody; bracts, scales generally persistent; scale not peltate, fused to or free from subtending bract. Seed: 2, on scale base adaxially.
Genera In Family: 10 genera, 193 species: generally northern hemisphere; many of great commercial value, supplying > 1/2 of world's timber.
eFlora Treatment Author: J. Robert Haller, Nancy J. Vivrette, & James R. Griffin, except as noted
Scientific Editor: Thomas J. Rosatti, Bruce G. Baldwin.

Common Name: PINE
Stem: young crown conic, mature often rounded or flat; branches +- whorled in young plants; young bark smooth, mature furrowed; bud +- conic, generally resinous. Leaf: generally 2.5--35 cm, generally sessile, in bundles of (1)2--5; bundles 1 in axils of alternate, awl-like bracts, base in a sometimes deciduous, scaly sheath of bracts, generally persistent several years. Seed Cone: often whorled, generally maturing, opening 2nd year, persistent on stem or not; stalk 0 or < 16 cm; bract included, fused to scale at least basally, minute; scale tip reflexed, elongated 3--7 cm or often with a rounded or angled, often prickled knob < 3 cm. Seed: coat hard, woody or not. Chromosomes: 2n=24.
Etymology: (Latin: pine) Note: Pinus pinea L., stone pine (leaves 2 per bundle, 10--30 cm; seed cone 8--15 cm, maturing in 3 years) cultivated in Europe for over 6000 years for edible seeds (pine nuts), reportedly naturalized in SnFrB, northern ChI.
Unabridged Note: Morphological, genetic study of relationships among Pinus jeffreyi, Pinus ponderosa, and Pinus washoensis indicates that the taxa should be classified as 2 species, Pinus jeffreyi and Pinus ponderosa, and that the latter comprises three varieties: Pinus ponderosa var. pacifica (new taxon), Pinus ponderosa var. ponderosa, and Pinus ponderosa var. washoensis (new combination).
eFlora Treatment Author: J. Robert Haller & Nancy J. Vivrette
Unabridged Reference: Millar & Critchfield 1988 Madroño 35:39--53

Common Name: PONDEROSA PINE, WESTERN YELLOW PINE
Stem: trunk generally < 68 m, generally < 2.2 m wide; branched in lower 1/2 when mature or not; mature bark furrows shallow, well spaced, forming plates, outer scales with +- yellow inner surfaces; mature crown short, conic or flat-topped; buds resinous, scales red-brown, dark-hairy. Leaf: (2)3[5] per bundle, 12--26 cm, < 2 mm thick, +- or not glaucous, deep yellow-green; sheath persistent. Seed Cone: +- spreading or recurved, 7--15(18) cm, ovate to +- conic, when immature green-brown to dark purple; stalk < 2 cm, persistent with proximal scales; scales generally darker abaxially than adaxially, in open cone well separated to very crowded; knob prickles < 3 mm, straight or outcurved; bracts with light brown fringing hairs. Seed: < wing.

Unabridged Note: Because the neotype of Pinus ponderosa actually is a Washoe pine cone, a different name for Pacific Ponderosa pine would have been needed had the name Pinus ponderosa not been conserved with a different type by recent, special botanical legislation.