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
- Cyperaceae
- Carex
- Carex Group 6
- Section Limosae
Section Limosae
See list of 4 species in this sectionReference: Ball (2002b).
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1a. Carpellate scales longer than the perigynia they subtend [Fig. 94]; lowest bract of inflorescence 3–15 cm long, equaling or exceeding the height of the inflorescence; stems usually phyllopodic, with dead leaf remains at base
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1b. Carpellate scales shorter than (rarely as long as) the perigynia they subtend [Fig. 95]; lowest bract of inflorescence 0.5–7 cm long, shorter than the height of the inflorescence; stems usually aphyllopodic, without dead leaf remains at base (usually phyllopodic and with dead leaf remains at base in C. rariflora)
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2a. Carpellate scales 1.3–1.8 mm wide, narrower than the perigynia they subtend; lateral spikes usually androgynous, (10–) 25–50 mm long; leaf blades 2–5 mm wide
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2b. Carpellate scales 2–3.4 mm wide, wider than (rarely as wide as) the perigynia they subtend; lateral spikes usually unisexual and carpellate (sometimes androgynous in C. limosa), 6–20 mm long; leaf blades 1–2.5 mm wide
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3a. Perigynia acute at apex, with a beak 0.1–0.5 mm long; stems usually aphyllopodic, without dead leaf remains at base; lateral spikes with 8–30 perigynia; leaf blades glaucous-green, involute
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3b. Perigynia rounded to obtuse at apex, with a beak up to 0.3 mm long; stems usually phyllopodic, with dead leaf remains at base; lateral spikes with 2–10 perigynia [Fig. 95]; leaf blades green, relatively flat or sometimes with involute margins
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Show photos of: Each photo represents one species in this section.