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Setaria: Dichotomous Key
...falling free from the more persistent glumes; mature caryopsis yellow to red or brown to black 4b. Fertile lemma evidently transversely rugulose, dull; disarticulation below the glumes, ...
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Ilex: Dichotomous Key
...stamens free; leaves without stipules; branchlets and winter buds purple 1b. Perianth 4- to 8-merous; sepals evident, persistent in fruit; petals obovate, white, connate at the base; stam...
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Salix: Dichotomous Key
... free from the branch. This character (branch brittleness) is very useful for identification and is important to note on herbarium labels. Salix trianda L. was reported from ME by Argus (2010). Howev...
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Sparganium fluctuans (floating bur-reed)
...tepals free from fruit stipe, and anthers 0.8–1.5 mm long (vs. S. fluctuans, with beak of mature fruit flattened and strongly curved, tepals adnate to fruit stipe for ca. 1/2 their length, and anthers...
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Gentianaceae: Dichotomous Key
...stamens free from the petals; anthers versatile 4a. Corolla with (4–) 5–12 lobes [Figs. 668, 669], the lobes lacking a prominent glandular spot; anthers recurving or coiling after anthesi...
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Lemna: Dichotomous Key
...acid-free paper) along with chemical preservation assist greatly with identification and vouchers the collection. Preserving thalli in 70% ethanol (C₂H₅OH) makes them transparent, which allows veins a...
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Group 3: Monocots: Dichotomous Key
...long, free floating on or near the surface of water [Fig. 61] (in part) 1b. Plants not thalloid, differentiated into stems and leaves, usually much longer or taller; habit various, but wh...
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Sparganium: Dichotomous Key
...tepals free from fruit stipe; anthers 0.8–1.5 mm long; stigmas (0.6–) 0.8–4 mm long 4a. Both the sessile carpellate spikes of the main axis and the peduncle bases of the lateral branches...
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Lemna minor (common duckweed)
...a free-floating aquatic perennial that forms a floating mat of minute foliage on the water surface. Common duckweed can be used to remove excess nutrients or toxic metals from water bodies (called phy...
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Wolffiella gladiata (sword-like bog-mat)
...native, free-floating, rootless, aquatic plant. It is found throughout much of the eastern half of the United States, though it is rare in the New England region. Habitat: lacustrine (in lakes or p...