Opposite Leaf Structure
Look at the tip- the part farthest away from the stem- of several
leaves. Choose big leaves that arenít starting to decay. Observe the angle
formed when the two sides of the leaf come together at the tip. Look only within
Ĺ cm of the tip, not farther down the leaf. Acute leaves have angles less than
90 degrees, obtuse leaves form angles greater than 90 degrees. Youíll need to
approximate, as every leaf may be slightly different. Just because a leaf is
long and thin doesnít mean the tip is acute. Use a magnifying glass to take a
close look at the tip of thin leaves.
If you don't think your plant is represented above try going back a level and choosing again.
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