Nathaniel Whitmore
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Evergreen Key

1/1/2016

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1.  leaves scale-like – Cupressaceae
1.  leaves needle-like
            2.  leaves aromatic – Pinaceae
            2.  leaves not aromatic – Taxaceae
Local genera of Pinaceae can be keyed out as follows:​

1. deciduous trees with needles in whorls – Larix
1. evergreen trees
            2. needles in clusters (fascicles) of 2-5 – Pinus
            2. needles occurring singly
                        3. twigs mostly smooth with circular leaf scar – Abies
                        3. twigs rough with raised leaf scars
                                    4. needles spirally arranged around twig, sessile – Picea
                                    4. needles with petiole arranged on opposite sides of twig – Tsuga
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