What’s a dichotomous key?
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- Group 1Lycophytes, Monilophytes
- Group 2Gymnosperms
- Group 3Monocots
- Group 4Woody angiosperms with opposite or whorled leaves
- Group 5Woody angiosperms with alternate leaves
- Group 6Herbaceous angiosperms with inferior ovaries
- Group 7Herbaceous angiosperms with superior ovaries and zygomorphic flowers
- Group 8Herbaceous angiosperms with superior ovaries, actinomorphic flowers, and 2 or more distinct carpels
- Group 9Herbaceous angiosperms with superior ovaries, actinomorphic flowers, connate petals, and a solitary carpel or 2 or more connate carpels
- Group 10Herbaceous angiosperms with superior ovaries, actinomorphic flowers, distinct petals or the petals lacking, and 2 or more connate carpels
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- Dichotomous Key
- Nymphaeaceae
- Nymphaea
Nymphaea
See list of 3 species in this genusReferences: Wiersema (1997b), Hellquist and Crow (1984).
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1a. Flowers 3–7.5 cm wide, with 20–40 stamens; stigmatic disk with 5–12 lines; leaf blades elliptic, (2–) 4–9 (–15) cm wide, with a wide sinus, mottled when young
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1b. Flowers 6–19 cm wide, with 40–100 stamens; stigmatic disk with 10–25 lines; leaf blades orbicular, (5–) 10–30 (–40) cm wide, with a narrow sinus, not mottled
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2a. Petals acute to narrow-rounded at the apex; abaxial surface of the sepals and leaf blades purple or sometimes green; inner filaments narrower than the anthers; seeds 1.5–2.5 mm long; branches of the rhizome not constricted at the base; petioles faintly, if at all, striped; flowers strongly fragrant
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2b. Petals broad-rounded at the apex; abaxial surface of the sepals and leaf blades green; all the filaments broader than the anthers; seeds 2.8–4.5 mm long; branches of the rhizome constricted at the base, breaking into tuber-like segments [Fig. 56]; petioles striped with brown-purple; flowers weakly or not at all fragrant
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Show photos of: Each photo represents one species in this genus.