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Geum vernum (spring avens)
...petals 2–4 mm long (vs. G. vernum, with the epicalyx absent, cluster of achenes stipitate on a stalk 1-2 mm long above the persistent calyx, and petals 1-2 mm long).: Geum virginianum ...
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Rosa arkansana (prairie rose)
...(if 2 or more) the carpels are not fused to one another. Carpels fused: the carpels are fused to one another. Collateral bud...
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Rosa canina (dog rose)
...1–2 mm wide, the stigmas exserted 1–2 mm beyond it, leaflets pale green abaxially, and sepals pinnatifid).: Rosa cinnamomea Synonyms: Ros...
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Quercus coccinea (scarlet oak)
...1/2 of the nut).: Quercus rubra sinuses of leaf blades usually extending less than 1/2 way from the tip of the lobes to the midrib and winter buds 7-10 mm long, hairy ...
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Sanguisorba minor (salad burnet)
...mostly 25–80 mm long and flowers with 4 stamens and 1 carpel (vs. S. minor, with leaflets 5–20 mm long and flowers with 12 or more stamens and 2 carpels).: Sanguisorba canadensis ...
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Callitriche hermaphroditica (autumn water-starwort)
...or 2. Floating leaf length: 0.0 mm–0.0 mm. Style number: 2.0 None–2.0 None. Roots flo...
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Bromus hordeaceus (soft brome)
...or 2 spikelets; reproductive stems slender, 2–16 cm tall; awns sometimes divaricate in fruit … 6a. B. hordeaceus ssp. thominei (Hardouin) Mair e in Ember...
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Verbesina alternifolia (wingstem crownbeard)
...mm–250.0 mm. Seed hair tuft length: 1.5 mm–2.0 mm. Leaf blade width: 20.0 mm–80.0 mm. ...
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Anemone cylindrica (long-headed windflower)
...usually 2 or 3 leaves, and the heads of achenes 1.5-3 cm tall and 1-1.5 times as tall as wide (vs. A. cylindrica, with the inflorescence subtended by usually 5-9 leaves, and the heads of achenes 2-4.5...
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Allium tricoccum (ramps, wild leek)
...Bulbs 2–4 (–5) ×1–1.5 cm; leaves not or scarcely petiolate, white at the base, with blades (1.5–) 2–4 (–4.5) cm wide; spathiform bracts 1–2 cm long; umbel with (6–) 12–18 (–24) flowers … 6a. ...