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Mentha: Dichotomous Key
...4–19 or more verticillasters of flowers, elongate and cylindric, (30–) 40–100 (–150) ×5–10 (–15) mm 4a. Leaf blades ovate to suborbicular, 1–2 times as long as wide, mostly shorter...
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Linum: Dichotomous Key
...(1963). 1a. Flowers with 4 sepals, petals, stamens, and styles; sepals with 3 apical lobes; leaf blades 2–3 mm long; plants diminutive annuals, 3–10 cm tall 1b. Flowers wi...
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Oxalis: Dichotomous Key
...(1–) 2–12 (–18) flowers; petals pink-purple to purple (rarely pink or white); sepals with a pair of orange tubercles at the apex (these confluent and appearing as 1 tubercle in O. violacea); le...
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Populus key for mature vegetative material: Dichotomous Key
...5–10 cm long, eciliate, crenate-serrate with teeth ca. 1 mm tall; apex of petiole without glands; branchlets terete; lateral winter buds appressed 5b. Leaf blades on long shoots 10–18 cm ...
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Mibora minima (early sand grass)
...cm–15.0 cm. Anther length: 1.0 mm–1.7 mm. Inforescence position: the spikelets are mainly carried at the ...
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Muhlenbergia sylvatica (woodland muhly)
...S1) Information from Dichotomous Key of Flora Novae Angliae: 10. Muhlenbergia sylvatica Torr. ex Gray N...
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Crypsis schoenoides (swamp pricklegrass)
...mm–1.1 mm. Inflorescence branches: there are no branch points between the base of the inflorescence axis and the flowers, or they are not obvious. ...
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Wolffia borealis (northern water-meal)
...surface, 1–1.5 times as long as wide (vs. W. borealis, with thalli with a minute, upward-bent point at each apex, lacking a central papilla, 1.3–2 times as long as wide).: Wolffia brasilie...
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Daphne cneorum (rose daphne)
...reaching 1 foot (0.3 m) in height, and suitable for rock gardens. Habitat: anthropogenic (man-made or disturbed habitats) All Characteristics: New England state: ...
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Spirodela polyrrhiza (common duck-meal)
...7–16 veins, 1–1.5 times as long as wide, and roots numbering 7–21 per thallus, only 1 or 2 perforating the small, membranous scale at thallus base).: Landoltia punctata ...