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Elatine minima (small waterwort)
... 1 or 2. Underwater leaf blade veins: 1.0 NA–1.0 NA. Leaf stalk attachment to leaf: the peti...
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Group 6: Herbaceous angiosperms with inferior ovaries: Dichotomous Key
...Leaves 1–12 per node, entire, toothed, or lobed, without arcuate venation; flowers not pseudanthial, lacking petaloid bracts 10a. Calyx 3-merous, gamosepalous, petaloid (in part) ...
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Group 7: Herbaceous angiosperms with superior ovaries and zygomorphic flowers: Dichotomous Key
...with 1–3 seeds (in part) 10b. Calyx with 4–6 sepals; androecium of 2–25 stamens, but not 3; fruit a capsule, silique, legume, schizocarp, or achene 11a. Fruit a legume or s...
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Quercus: Dichotomous Key
...obovate, 15–75 mm wide; petioles 10–20 mm long; carpellate involucres 5–9 mm tall and 10–18 mm in diameter; nuts 10–18 mm wide 3b. Leaf blade linear to narrow-elliptic, 10–25 mm wide; pet...
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Quercus rubra (northern red oak)
...covering 1/3 to 1/2 of the nut (vs. Q. rubra, with a terminal winter without hairs and circular in cross-section, and involucre of nut (the "cap") covering 1/3 or less of the nut).: ...
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Utricularia cornuta (horned bladderwort)
...7–14 mm long and a lower corolla lip 9–16 mm long, pedicels 1–2 mm long, and intact leaf-like branches with a mass of brown cells at the apex, often forming a callus tip).: Utricularia sub...
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Eleocharis acicularis (needle spikesedge)
...mm–1.5 mm. Fruit length: 0.7 mm–1.1 mm. Floral scale nerves: 1. Leaf special fea...
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Oenothera filiformis (bee-blossom)
...petals 1.5–3 mm long, and anthers 0.5–1 mm long (vs. O. filiformis, with sepals 6–18 mm long, petals 6–15 mm long, and anthers 1.5–5 mm long).: Oenothera curtiflora st...
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Solanum carolinense (Carolina nightshade)
...berry 1–1.5 cm long, yellow).: Solanum melongena petals yellow and leaf blades evidently 1- to 2-times pinnately lobed (vs. S. carolinense, with petals light purple to...
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Viola pectinata (pectinate-leaved violet)
...(Brainerd 1921, Russell 1965) This is because it is similar in flower and fruit morphology to V. brittoniana and often (but not always) occurs with that species. However, these two species diff...