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Arctium minus (common burdock)
...heads 25-45 mm wide and array of flower heads flat-topped (vs. A. minus, with bur-like flower heads 15-25 mm wide and array of flower heads not flat-topped).: Arctium lappa ...
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Cirsium arvense (creeping thistle)
...plant's tip or towards it's base. Seed hair tuft details: the pappus hairs have smaller hairs along their sides. L...
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Carex normalis (greater straw sedge)
... 2.2 mm–6.5 mm. Achene width: 0.9 mm–1.2 mm. Scale length: 2.1 mm–3.3 mm. ...
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Agropyron cristatum (crested wheat grass)
...of 25-45 degrees (vs. A. cristatum, with spikes 8-23 mm wide and spikelets diverging from the inflorescence rachis at an angle of 45-90 degrees).: Agropyron desertorum ...
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Swida racemosa (gray dogwood)
...1–2 mm long (vs. S. racemosa, with pith white or infrequently light brown, style of nearly uniform diameter throughout, and sepals shorter than 1 mm).: Swida amomum ...
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Liatris pycnostachya (thick-spiked blazing star)
...11-20. Flower head width: None mm–2.9 mm. Disk flower shape: the disk flower is tube-shaped (cylindrical...
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Quercus cerris (European turkey oak)
...or 20 m tall), with deeply lobed leaves and platy, fissured bark. It's easy to distinguish by its acorns, which have bristly caps. Habitat: anthropogenic (man-made or disturbed habitats), fore...
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Salsola tragus (prickly saltwort)
...1–2 mm wide in drying, gradually narrowed to a firm, spine tip 0.5–1.5 mm long (vs. S. tragus, with leaf blades narrow-linear to filiform, not or only scarcely fleshy in life, narrower than 1 mm wide ...
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Elymus wiegandii (Wiegand's wild-rye)
...(1873-1942), who led the Cornell herbarium (Bailey Hortatorium) for 28 years and vastly increased its plant collections to over 250,000 specimens. Habitat: floodplain (river or stream floodplains), ...
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Betula pubescens (downy birch)
...or 2. Bark texture: the bark of an adult plant peels off easily or hangs off. Wings on branch: the...