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Genus: Rosa (rose)
...and 1 sepal with slender lobes on only 1 margin. A clue that a rose may be a naturalized European species and not native is the presence of a double corolla. References: Lewis (1957), Graham and Prima...
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Onagraceae: Dichotomous Key
... 1a. Perianth 2-merous [Fig. 738]; fruit indehiscent, covered with uncinate bristles; leaves opposite; petals white 1b. Perianth 4- to 6-merous; fruit dehiscent (indehiscent in so...
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Botrychium: Dichotomous Key
...roots 1.5–5.5 mm thick 1 cm from stem (mean=2.5 mm), dark gray-brown and with abundant transverse circular ridges in the proximal 1–5 cm (in part) 1b. Trophophore simple or up to twice...
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Cystopteris: Dichotomous Key
...(1993a). 1a. Rachises, costae, and indusia sparsely to densely stipitate-glandular; bulbils often present on the abaxial blade surface (these rare and misshapen in C. laurentian...
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Nuphar: Dichotomous Key
...(1997), Hellquist and Crow (1984). 1a. Sepals 1–2.5 cm long, numbering 5 per flower; anthers predominantly shorter than the filaments, 1–3 mm long; fruit strongly constricted below the...
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Hydrocharitaceae: Dichotomous Key
...[Figs. 131, 132] 4a. Leaves all basal, 10–110 cm long, with a prominent, broad, central lacunar band [Fig. 132]; staminate flowers with 2 stamens 4b. Leaves borne on an elon...
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Cornaceae: Dichotomous Key
... 1a. Flowers with 5–8 petals, of 2 types—staminate with 8–15 stamens and functionally carpellate with 5–10 stamens that have nonfunctional anthers; pith diaphragmed; leaves alternate ...
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Section Paludosae: Dichotomous Key
...(5.5–) 8.5–21 mm wide, the longest ligules 13–40 mm long 3b. Leaves with blades 2.6–5 (–6) mm wide, the longest ligules 1.8–12.5 mm long 1b. Perigynia pubescent; style articu...
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Puccinellia: Dichotomous Key
... 1a. Anthers 1.5–2.6 mm long; first glume 2–3.5 mm long; second glume 2.8–4 mm long; spikelets with 5–11 florets; plants often stoloniferous 1b. Anthers 0.3–1.5 (–2) mm long; firs...
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Ilex: Dichotomous Key
...(30–) 50–100 mm long; carpellate flowers 4-merous; drupe red (rarely yellow), 7–10 mm thick 4a. Leaf blades dull or barely sublustrous, with marginal spines that are +/- in plane with the...