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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
Eryngium are perennial plants from thick, cylindric or turnip-shaped taproots.
1b. Bracts subtending inflorescence conspicuous, usually projecting well beyond the width of the inflorescence, mostly spinulose-toothed [Fig. 349]; leaf blades lobed or unlobed and then elliptic-oblong to elliptic-ovate and net-veined; inflorescence usually blue
Show photos of: Each photo represents one species in this genus.