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Ranunculus bulbosus (bulbous crowfoot, St. Anthony's turnip)
...to 1 mm long (vs. R. bulbosus, with petals 6–15 mm long, usually longer than the sepals, base of stem thickened and bulb-like, and anthers 1.2 mm long or longer).: Ranunculus sardous ...
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Oxalis dillenii (slender yellow wood sorrel)
... 15.0 mm–25.0 mm. Petal length: 4.0 mm–10.0 mm. Horns in hoods (Asclepias): NA. ...
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Sinapis arvensis (corn charlock)
... 15.0 mm–57.0 mm. Fruit length to width ratio: 10.0 NA–14.3 NA. Leaf blade veins: the lea...
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Hypericum perforatum (common St. John's-wort)
... 1.0 NA–1.5 NA. Leaf tufts in axils: there are clusters of smaller leaves growing out of axils. Leaves on ste...
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Pyrola elliptica (elliptic-leaved shinleaf)
...a 1990s study conducted in Massachusetts, elliptic-leaved shinleaf was one of the few understory plants that still had not recovered since the forest canopy was blown down in a 1935 hurricane, even th...
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Rorippa palustris (common yellow-cress)
... 1.5 mm–3.0 mm. Fruit width: 1.5 mm–3.5 mm. Petal number: 4.0 NA–4.0 NA. ...
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Gentiana clausa (closed gentian, meadow bottle gentian)
...mm–150.0 mm. Leaf type: the leaves are simple (i.e., lobed or unlobed but not separated into leaflets). Seed length: ...
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Epilobium lactiflorum (white-flowered willow-herb)
... 1.1 mm–1.6 mm. Stem spacing: the plant is growing in tufts, or compact clusters with closely spaced stems, or it is densely matted to...
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Cardamine impatiens (narrow-leaved bitter-cress)
... 1.1 mm–1.5 mm. Flowering stem cross-section: the flowering stem is circular, or with lots of small angles so that it is roughly circu...
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Oenothera parviflora (small-flowered evening-primrose)
... 1.1 mm–1.8 mm. Bulblets replace flowers: there are no bulblets where the flowers are located. Stamen attachm...