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Abies
See list of 3 species in this genusReference: Hunt (1993).
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1a. Branches deeply grooved, especially the 2- and 3-year-old ones
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1b. Branches ungrooved or scarcely grooved
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2a. Leaves 1.2–2.5 cm long, dark green and hardly (if at all) glaucous; seed cones 4–7 cm long; resin canals of leaves median, located well away from either epidermis (this character best viewed in cross-section with a 20 × hand lens)
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2b. Leaves (1.5–) 4–6 cm long, glaucous on both surfaces; seed cones 7–12 cm long; resin canals of leaves located near the abaxial epidermis
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Each photo represents one species in this genus.