Leaf Identification
Leaf Identification - Related Videos
12:06
Tree Identification: How To Use a Dichotomous Key
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University A dichotomous key is a tool that identifies items in nature, such as leaves. This method is based on the idea of choosing between two characteristics. The word dichotomous comes from two Greek words that mean “to divide into two parts.” In a dichotomous key for leaf identification, each pair of phrases describes different features of the leaf. Only one of the phrases correctly applies to the leaf being keyed out. The...
11:09
Relating Stomatal Conductance to Leaf Functional Traits
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Cited by 39 •
2015
Unraveling how physiology and morphology are linked allows a deeper understanding of mechanistic functioning of plant leaves. We present both a procedure to derive parameters of stomatal regulation from stomatal conductance measurements and correlations with traditional functional leaf traits.
07:03
Assessing Stomatal Response to Live Bacterial Cells using Whole Leaf Imaging
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Cited by 38 •
2010
We have developed a simple and reproducible protocol to access stomatal response to live bacteria. This method minimizes wounding and manipulation of the leaf as compared to the use of epidermal peels reported previously.
08:14
LeafJ: An ImageJ Plugin for Semi-automated Leaf Shape Measurement
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Cited by 93 •
2013
Demonstration of key methods for high throughput leaf measurements. These methods can be used to accelerate leaf phenotyping when studying many plant mutants or otherwise screening plants by leaf phenotype.
10:49
Measuring Rates of Herbicide Metabolism in Dicot Weeds with an Excised Leaf Assay
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Cited by 14 •
2015
This manuscript describes how herbicide metabolism rates can be effectively quantified with excised leaves from a dicot weed, thereby reducing variability and removing any possible confounding effects of herbicide uptake or translocation typically observed in whole-plant assays.
FAQs
Shape, arrangement, venation, margin, texture, and attachment provide complementary evidence rather than relying on one feature alone. For example, the pattern of veins can be considered alongside the leaf edge, surface texture, and point of attachment. Comparing several observable traits improves consistency when botanical descriptions or reference specimens present similar-looking alternatives.
Leaf features create a structured basis for comparing an unknown plant with documented botanical characteristics. Arrangement and attachment describe how leaves relate to the plant, while shape, margin, venation, and texture add distinguishing detail. Considering this combination reduces dependence on a single visual impression and supports more defensible classification during ecological studies.
A dichotomous key guides identification through a sequence of contrasting choices based on observable traits. Reference specimens and botanical descriptions instead provide material or written characteristics for direct comparison. Both approaches help match an unknown leaf to documented plant identities, but they organize evidence differently and can support careful checking of the same classification.
Begin by examining the available leaf characteristics, including shape, arrangement, venation, margin, texture, and attachment. Next, compare those observations with botanical descriptions, reference specimens, or a dichotomous key. Record the resulting plant identity for the survey. Applying the same feature-based process across observations supports consistent documentation of vegetation and plant diversity.
The method is valuable during biodiversity surveys, habitat composition assessments, conservation planning, and ecological research. Identifying plants from leaf traits allows investigators to document which vegetation occurs in a study area and compare observations over time. This information can support evaluations of plant diversity and contribute to broader assessments of ecosystem health.
Repeatedly documenting plant identities allows researchers to track vegetation patterns and changes in habitat composition. Recognizing indicator species adds ecological context because some species are associated with particular environmental conditions. Over long-term monitoring, these records can help reveal shifts in plant communities and inform conservation decisions concerning biodiversity and ecosystem health.