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Dichanthelium acuminatum (hairy rosette-panicgrass)
...mostly 2-2.2 mm long (vs. D. acuminatum, with a ligule of hairs 1-5 mm long and spikelets 1.3-2.1 mm long).: Dichanthelium boreale spikelets 2.1–2.6 mm long, and sheat...
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Poaceae Group 4: Dichotomous Key
... 20a. Lemmas usually blunt at the apex, with parallel veins that do not converge near the tip [Figs. 264, 265] 21a. Lemmas prominently veined; plants of freshwater habitats ...
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Cardamine: Dichotomous Key
...with 2 or 3 (rarely up to 5) leaflets [Fig. 512]; siliques 5–12 mm long; fruiting pedicels 1–3 mm long [Fig. 515]; petals absent or up to 1.2 mm long and not exceeding the sepals (in part) ...
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Utricularia geminiscapa (mixed bladderwort)
... 2.0 NA–2.0 NA. Flowering stem growth form: the flowering stem is upright. Petal or sepal number: ...
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Rubus frondosus (leafy-flowered blackberry)
...than 2 times as long as wide).: Rubus argutus prickles of the stem mostly 2–4 mm long, numbering 0–20 per 10 cm, leaf blades herbaceous, and inflorescence with mostly ...
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Linaria genistifolia (broom-leaved toadflax)
...corolla 20–50 mm long and leaf blades 10–40 mm wide, broad-lanceolate to ovate, mostly 2–4 times as long as wide (vs. L. genistifolia, with the corolla 13–22 mm long and leaf blades 3–15 mm wide, narr...
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Sparganium angustifolium (narrow-leaved bur-reed)
...(0.8–) 0.9–1 (–1.2) mm long and stigmas (0.6–) 0.8–1 (–1.2) mm long, and S. emersum has anthers 1–1.5 (–2) mm long and stigmas (1–) 1.5–2 (–2.5) mm long. Native to North America? ...
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Sparganium fluctuans (floating bur-reed)
... 2.0 mm–3.5 mm. Leaf arrangement: alternate: there is one leaf per node along the stem. Stamen number: ...
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Apera spica-venti (loose silky bentgrass)
...mostly 2-5 mm wide, panicles relatively open and 20-150 mm wide, and anthers 1-2 mm long).: Apera interrupta Synonyms: Agrostis spica-ven...
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Verbesina encelioides (golden crownbeard)
...with 2–10 sterile ray flowers, and leaf blades serrate to subentire (vs. V. envcelioides, with plants annual, 2–10 dm tall, stems without decurrent wing-angles, capitula with 10–15 carpellate ray flow...