Weber State University
Department of Botany
1. Leaves scale-Iike or acicular, opposite; fruit berry-like. Cupressaceae
1. Leaves narrowly linear, spirally arranged on the stem. Pinaceae
1. Leaves always acicular, jointed at the base. J. communis
1. Leaves scale-like, never jointed (2)
2. Edges of leaves minutely serrulate (as seen through a hand lens). J. osteosperma
2. Edges of leaves never serrulate. J. scopulorum
J. communis L var. depressa Pursh
J. osteosperma (Torr.) Little
J. scopulorum Sarg.
1. Leaves in clusters of 2-5 (except in P. monophylla which has but one leaf that is round in cross section). Pinus
1. Leaves not in clusters, but borne singly, 4-sided or flattened in cross section (2)
2. Leaves 4-sided in cross-section; branches with rough persistent leaf bases. Picea
2. Leaves flattened in cross-section; branches without rough leaf bases (3)
3. Cone scales persistent; cones with conspicuous forked bracts. Pseudotsuga
3. Cone scales deciduous: cones without bracts. Abies
1. Cones gray-green; resin ducts of the leaves positioned adjacent to the lower epidermis. A. concolor
1. Cones dark brown-purple; resin ducts of the leaves positioned centrally. A. lasiocarpa
A. concolor (Gord. & Glend.) Lindl.
A. lasiocarpa (Hook.) Nun.
Picea A. Dietr.
P. engelmannii Parry ex Engelm.
1. Leaves solitary. P. monophylla
1. Leaves in clusters of 2 or 5 (2)
2. Leaves in clusters of 2. P. contorta
2. Leaves in clusters of 5. P. flexilis
P. contorta Dougl.
P. flexilis James
P. monophylla Torr. & Frem.
P. menziesii (Mirb.) Franco var. glauca (Biessn.) Mayr
Key to Woody Plants of Northern Utah
A combined PDF file of the two plant keys is available. You will need an Adobe Acrobat Reader in order to read and print this file. (In case you haven't heard, the Reader is free.)
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5 June 2003