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
- Group 2: Gymnosperms
Group 2: Gymnosperms
See list of 3 families in this group-
1a. Seeds borne singly, partly concealed by a red, fleshy aril; abaxial surface of the flat leaves bearing pale yellow, longitudinal, stomatal lines
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1b. Seeds 1–400, borne in woody or fleshy strobili, lacking a fleshy, red aril [Figs. 43,45,48]; abaxial surface of the flat to tetragonous leaves without yellow lines (though sometimes with white or gray stomatal lines)
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2a. Leaves opposite or whorled, imbricate and concealing the branchlet (the branchlet visible in Juniperus communis), persistent on dried specimens; strobili with peltate scales, or with opposite, basifixed scales, or the scales fleshy and coalesced into a berry-like form [Fig. 43]; each scale of a strobilus bearing 1–20 ovules, without free subtending bracts
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Show photos of: Each photo represents one family in this group.