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Solidago: Dichotomous Key
... 19a. Leaf blades elliptic to ovate, 3–10 cm wide, 1.2–2.2 (–2.5) times as long as wide; stem angled, not glaucous 19b. Leaf blades lanceolate to narrow-elliptic, 1–3 cm wide, 3–1...
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Potentilla: Dichotomous Key
...4–10 (–11) mm long; filaments 1.5–3.5 mm long; anthers 0.7–1.2 (–1.6) mm long 9a. Leaflets sparsely tomentose abaxially, toothed with elongate, triangular-lanceolate teeth mostly 5–15 mm ...
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Viola key for fruiting and cleistogamous flowering material: Dichotomous Key
...5–10 mm long; seeds 1.5–2.2 ×1.2–1.5 mm 27b. Stipules herbaceous, green, mostly dentate or undulate; capsules 10–12 mm long; seeds 2.5–3.2 ×1.5–1.8 mm 26b. Stip...
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Lycopus americanus (American water-horehound)
... 1.0 mm–1.4 mm. Tendrils: the plant does not have tendrils. Staminodes: the flower ...
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Nasturtium microphyllum (one-rowed water-cress)
...fruit 1.5-3 mm wide with seeds aligned in 2 rows in each chamber (vs. N. microphyllum, with fruit 1-1.5 mm wide with seeds aligned in 1 row in each chamber).: Nasturtium officinale ...
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Torreyochloa pallida (pale false manna grass)
... 1.0 mm–10.0 mm. Glume veins: 1. Floating leaf blade width: 1.5 mm–3.0 mm. ...
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Apiaceae: Dichotomous Key
...21a. Upper leaf sheaths dilated, wider than 10 mm [Fig. 350]; inflorescence with 15–150 primary branches 21b. Upper leaf sheaths not dilated, narrower than 10 mm; marginal flowers of umbe...
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Glyceria septentrionalis (floating manna grass)
...rachilla 1.9–2.5 mm long, and anthers 2–3 mm long (vs. G. septentrionalis, with lemmas 3.7–5.3 mm long, internodes of rachilla 1.1–1.8 mm long, and anthers 1–1.7 mm).: Glyceria fluitans ...
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Callitriche palustris (vernal water-starwort)
... 1.0 NA–1.0 NA. Specific habitat: in lakes or ponds. Number of pistils: 1. ...
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Oenothera gaura (biennial bee-blossom)
...petals 1.5–3 mm long, and anthers 0.5–1 mm long (vs. O. gaura, with sepals 6–18 mm long, petals 6–15 mm long, and anthers 1.5–5 mm long).: Oenothera curtiflora stems d...