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Potamogeton ogdenii (Ogden's pondweed)
...0.6–2 mm wide, without lacunae, and stipules usually white, the margins connate (vs. P. ogdenii, with leaf blades with mostly 3–9 veins, 1.2–2.9 mm wide, with 0–3 rows of lacunae on each side of the m...
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Helianthus occidentalis (naked-stemmed sunflower)
...plant's tip or towards it's base. Number of pappus parts: 2. Tuft or plume on fruit: the...
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Tanacetum parthenium (feverfew tansy)
...12-20 mm long, involucres 12-20 mm in diameter, and capitula borne mostly singly at the tips of stems and branches (vs. T. parthenium, with rays mostly 2-10 mm long, involucres 5-7 mm in diameter, and...
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Carex grisea (inflated narrow-leaved sedge)
...mostly 2-2.6 mm wide, and mostly 1.8-2.3 times as long as wide).: Carex amphibola widest leaf blades mostly 2.4-4 mm wide and beak of perigynium 0.4-1.2 mm long (vs. C...
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Panicum amarum (bitter panicgrass)
... 20.0 cm–250.0 cm. Floret number: 1.0 NA–2.0 NA. Glume veins: 7 or more. ...
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Symphoricarpos orbiculatus (red snowberry)
... 2. Symphoricarpos orbiculatus Moench Ered snowberry. Symphoricarpos symphoricarpos (L.) MacM. • CT, MA, RI, VT. Roadsides, forest borders, yard...
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Veronica agrestis (green field speedwell)
...capsules 2.5–4 x 3.5–6 mm, with 9–12 seeds per locule (vs. V. agrestis, with the corolla blue or white, styles up to 1 mm long, not extending beyond the apical notch of the capsules, and capsule 4–6 x...
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Schizachyrium scoparium (little bluestem)
... 2. Plant height: 30.0 cm–210.0 cm. Bristles below spikelets: no. S...
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Magnolia tripetala (umbrella-tree)
...72.0 mm–300.0 mm. Leaf blade shape: the leaf blade is elliptic (widest near the middle and tapering at both ends). Ae...
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Veronica spuria (bastard speedwell)
...or 2. Leaf arrangement: whorled: there are three or more leaves per node along the stem. Leaf blade base: ...