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Ilex crenata (Japanese holly)
...with 1–3 teeth per margin, the teeth usually restricted to the apical 1/3 of the blade, and flowers 6- to 8-merous (vs. I. crenata, with leaf blades with mostly 4–10 teeth per margin, the teeth usuall...
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Ratibida columnifera (prairie Mexican-hat)
...spherical, 10–25 x 10–18 mm, plants from fibrous roots, and pappus usually absent (vs. R. columnifera, with disk cylindric, 10–50 x 7–12 mm, plants from a taproot, and pappus usually consisting of 1 o...
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Arabis procurrens (running eared-rockcress)
...40-100 X 2.5-4 mm (vs. A. procurrens, with lower surface of leaves pubescent with mesifixed hairs, petals 8-10 mm long, and fruit 12-35 X 1-1.5 mm).: Boechera canadensis ...
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Triticum aestivum (bread wheat)
...mm–12.0 mm. Spikelet position: NA. Lower glume length: 6.0 mm–12.0 mm. Infloresc...
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Hippuris vulgaris (common mare's-tail)
... 1.0 None–1.0 None. Lifespan: the plant lives more than two years. Bulbils: the pla...
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Spartina alterniflora (smooth cordgrass)
... 1.0 NA–1.0 NA. Leaf blade texture: the leaf blade is rough and sandpapery. Lemma hairs: ...
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Betula populifolia (gray birch)
...8-11 mm (vs. B. populifolia, with branches spreading to ascending, staminate aments usually solitary, and carpellate aments mostly 10-25 x 6-8 mm).: Betula pendula ...
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Ostrya virginiana (hop-hornbeam)
...usually 1-seeded, does not separate or split open at maturity). Stamen number: 4. Leaf stalk shape: ...
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Muhlenbergia frondosa (wire-stemmed muhly)
... 1.6 mm–1.9 mm. Floret number: 1.0 NA–1.0 NA. Lemma base hairs: the lemma has hairs at th...
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Montia linearis (narrow-leaved montia)
...4-15 mm long, and capsules with 10-20 seeds (vs. M. linearis, with petals white to pale pink, 4-6.5 mm long, and capsules with 1-3 seeds).: Calandrinia ciliata sepals ...