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
- Myricaceae
Myricaceae
See list of 3 genera in this familyReferences: Baird (1968), Bornstein (1997).
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1a. Leaves stipulate, with pinnately lobed blades; bracts exceeding the fruit, persistent, forming an enclosing bur
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1b. Leaves exstipulate, the blades entire or toothed but without lobes [Fig. 728]; bracts shorter than to equaling the fruit, not forming a bur
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2a. Carpellate bracts 2, accrescent, clasping the achene in fruit; achene flattened, not concealed with a thick layer of wax; staminate aments borne at the apex of the previous year’s branchlet; leaf blades serrate in the distal ⅓; winter buds dark brown, ovoid, acute at the apex; preformed staminate aments present
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2b. Carpellate bracts 4–6, small and inconspicuous, even in fruit; achene subglobose, covered with a thick layer of blue-white wax; staminate aments borne below the apex of the previous year’s branchlet; leaf blades variably serrate in the distal ½; winter buds red, subglobose, obtuse at the apex; preformed staminate aments absent
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Show photos of: Each photo represents one genus in this family.