- Attenuate tapering down to the base with concave margins forming an angle of <45°
- Auriculate with ear shaped lobes at the base
- Cordate heart shaped at the base
- Cuneate wedge-shaped at an angle of 45-90° with straight margins
- Hastate basal lobes shaped like the hilt of a sword, pointing outwards
- Oblique assymmetrical
- Sagittate basal lobes shaped like an arrowhead, pointing back and down
- Truncate squared off at close to 180°
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| Attenuate leaf base |
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| Auriculate base of Manzanita |
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| Cordate base of Cheeseweed |
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| Mystery plant has Cuneate leaf base |
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| Hastate leaf base of a Manzanita |
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| Mystery plant on campus has oblique base |
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| Sagittate leaf base |
Truncate n/a
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