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
- Asteraceae
- Asteraceae Group 1
- Tragopogon
Tragopogon
See list of 3 species in this genusReference: Soltis (2006).
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1a. Peduncles slender, not enlarged in flower and scarcely enlarged even in fruit; cypsela body including beak 15–25 mm long; involucre 12–24 mm tall in flower, becoming 19–38 mm tall in fruit; involucral bracts shorter than to equaling the ray flowers in length
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1b. Peduncles apically enlarged and fistulous in flower and fruit [Fig. 473]; cypsela body 25–40 mm long; involucre 25–40 mm tall in flower, becoming 40–70 mm tall in fruit; involucral bracts exceeding ray flowers in length
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2a. Ray corollas yellow; pappus white to sordid-white; leaf apex usually straight (i.e., not prominently curved)
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2b. Ray corollas purple; pappus light brown; leaf apex usually recurved to recoiled
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Show photos of: Each photo represents one species in this genus.