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Types of keys3/12/2024 If materials to be identified are cultivated, one of the manuals treating such plants should be selected, since most floras do not include cultivated plants unless naturalized. However, if the locality is unknown a general work may be selected. If the family or genus is recognized, one may choose to use a monograph or revision. If the locality of an unknown plant is known, a flora, guide, or manual treating the plants of that geographic area may be selected. The keys may be in a flora, manual, guide handbook, monograph, or revision. (a) Appropriate keys should be selected for the materials to be identified. Suggestions for the Use of Taxonomic Keys: By making the correct choice at each level of the key, one can eventually arrive at the name of the unknown plant. It provides a choice between two contradictory statements resulting in the acceptance of one and the rejection of the other.Ī single pair of contradictory statements is called a couplet and each statement of a couplet is termed a lead. The key consists of a series of choices, based on observed features of the plant specimen.
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