1. leaves scale-like – Cupressaceae
1. leaves needle-like
2. leaves aromatic – Pinaceae
2. leaves not aromatic – Taxaceae
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
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
| gymnospermkey.docx |
