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Ambrosia trifida (giant ragweed)
... 11-20. Leaf blade base: the leaf has a distinct petiole. Leaf tip extension: NA. ...
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Heliotropium indicum (Indian heliotrope)
... 1.0 None–1.0 None. Stipule features: NA. Sepal and petal color: the sepals are dif...
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Crataegus boyntonii (stinking hawthorn)
...flowers 13–17 mm wide, and pomes obloid to obovoid (vs. C. boyntonii, with leaf blades with 3 or 4 pairs of obtuse to subacute lobes, the tips of the lobes ascending, those on long shoots with broad-o...
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Centaurea nigra (black knapweed)
... 15.0 mm–18.0 mm. Leaf type: leaves are simple (i.e., lobed or unlobed but not separated into leaflets). Leaf...
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Sisyrinchium atlanticum (eastern blue-eyed-grass)
...mm–11.0 mm. Petal fusion: the perianth parts are separate. Inflorescence type: the inflorescence is...
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Hydrocotyle umbellata (many-flowered marsh-pennywort)
... 1. Fruit length: 1.0 mm–2.0 mm. Berry color: NA. Capsule color (Vi...
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Dichanthelium oligosanthes (few-flowered rosette-panicgrass)
... 1.0 NA–2.0 NA. Leaf blade width: 4.0 mm–15.0 mm. One or more florets: there is one flore...
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Sambucus racemosa (red elderberry)
... 1. Twig winter color: brown. Sepal cilia (Ilex): NA. Twig ha...
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Isotrema tomentosum (woolly Dutchman's pipe)
... 1. Leaf type: the leaf blade is simple (i.e., lobed or unlobed but not separated into leaflets). Hairs on under...
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Trichophorum clintonii (Clinton's bulrush, Clinton's clubsedge)
...(1807-1885), a judge and son of a New York Governor, who began botanizing as a hobby when he was in his late fifties. Habitat: floodplain (river or stream floodplains), shores of rivers or lakes ...