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Sanguisorba officinalis (great burnet)
... 1.0 None–1.0 None. Stipule features: NA. Sepal and petal color: NA. ...
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Brachyelytrum aristosum (northern long-awned wood grass)
...mm–11.5 mm. Spikelet axis tip: there is an extension of the spikelet axis beyond the tip of the spikelet. Glumes per spikelet...
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Rubus pensilvanicus (Pennsylvania blackberry)
...per 10 cm, leaf blades tending to be more chartaceous, and inflorescence with mostly 1–7 leafy bracts (vs. R. pensilvanicus, with prickles of the stem mostly 2–4 mm long, numbering 0–20 per 10 cm, lea...
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Betula pendula (European weeping birch)
...mostly 10-25 x 6-8 mm (vs. B. pendula, with branches on mature trees usually pendulous, staminate aments mostly in pairs, and carpellate aments mostly 23-40 x 8-11 mm).: Betula populifolia...
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Cephalanthus occidentalis (common buttonbush)
...usually 1-seeded, does not separate or split open at maturity). Twig winter color: gray. Hairs on upper side of leaf blade: ...
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Potamogeton epihydrus (ribbon-leaved pondweed)
... 11.0 NA–41.0 NA. Sepals fused only to sepals: NA. Length of peduncle: 15.0 mm–160.0 ...
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Cinna arundinacea (sweet wood-reed)
...glume 1-veined and 2.6-4.1 mm long (vs. C. arundinacea, with upper glume 3-veined and 4.1-6.6 mm long).: Cinna latifolia Synonyms: Cinna ...
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Najas gracillima (slender waternymph)
...with 13–17 spinules and apex of leaf sheath truncate or auriculate).: Najus flexilis each margin of the leaf blade with 20–100 minute, unicellular spinules and apex of...
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Galium tricornutum (rough-fruited bedstraw)
...0.5-1 mm in diameter and schizocarps 1-1.4 mm wide (vs. G. tricornutum, with the corolla 1–1.7 mm in diameter, white, and schizocarps 3–5 mm wide).: Galium divaricatum ...
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Lipocarpha micrantha (small-flowered dwarf-bulrush)
... 15.0 mm–100.0 mm. Stamen number: 1. Seed tails: NA. Flowe...