Dichotomous Taxonomic Key
Field-guide-style dichotomous key for identifying common trees.
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flowchart TD
A{Leaf type?} -- needle-like --> N{Needles in bundles?}
A -- broad / flat --> B{Leaf margin?}
N -- yes, 2-5 per bundle --> Pine[Pinus — Pine]
N -- single, attached individually --> S{Branches drooping?}
S -- yes --> Spruce[Picea — Spruce]
S -- no --> Fir[Abies — Fir]
B -- serrated --> Ser{Alternate or opposite?}
B -- smooth --> Sm{Leaf shape?}
Ser -- alternate --> Birch[Betula — Birch]
Ser -- opposite --> Maple[Acer — Maple]
Sm -- lobed --> Oak[Quercus — Oak]
Sm -- entire ovate --> Magnolia[Magnolia]