Attachment 3 - Guide to Distinguishing Ponderosa_Jeffery Pines.pdf

Attachment 3 Ponderosa/Jeffrey guide Attribute Ponderosa pine Jeffrey pine Seedlings and Saplings:

Foliage Yellow-green Blue-green New growth Glabrous green-brown Glaucous blue-green Buds Resinous Non-resinous Bark Dark brown tends to furrow at early age Grey, tends to remain unfurrowed at early age

Poles & small sawtimber Foliage Tends to carry more Tends to carry less Branching Tends to carry finer Tends to be coarser Bark Tends to have irregular Tends to be evenly layered like lines on topo map Tends to feel scaly Tends to feel spongy When cut with knife shows distinct yellow, resinous When cut with knife color is dark red w/ or w/o white or silver striations

Large Sawtimber Bark Powdery yellow under-surface of scale Red-brown on undersurface of scales

Tends to have large orange plates

Tends to have narrower magenta plates w/ an iridescence

Tends to be odorless or smell slightly of vanilla

Tends to smell strongly of vanilla

Cones Immature Small, green Large, purple Open-fallen Small “prickly” (spines on scales pointing out) Large “gentle” (spines on scales pointing in)

Wood Stumps show greater percent of sapwood to heartwood

Stumps show greater proportion of heartwood to sapwood

Note: Unequivocal differences are in bold. Attributes for seedlings and saplings and most of those for large sawtimber are diagnostic, enabling trees at these stages to be comparatively easy to identify. Poles and small sawtimber which lack mature bark and have foliage above reach are often quite difficult to identify.