Botany/Plant structure laboratory

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I'm experimenting here with the practicality of having laboratory excercises as part of the Botany Study Guide Comments invited.

Chapter 3. Plant Structure Laboratory[edit]

Leaves[edit]

Sessile joyweed
Ludwigia palustris (Onagraceae)(2x Enlarge)

Examine this 'marsh purslane' plant and determine the following about its leaves:

3-1. Leaf arrangement is:

a) opposite
b) alternate
c) whorled
d) entire
e) smooth


3-2. Which of the following describes the leaves:

a) sessile, margin toothed
b) peltate, margin entire
c) sessile, margin entire
d) petiolate, margin crenate
e) petiolate and hirsute

3-3. Only one of the following statements is true:

a) A monocot with clasping leaves
b) A dicot with hairy, waxy leaves to reduce water loss
c) A monocot growing in relatively wet areas
d) A dicot with leaves opposite, leaf bases attenuate
e) A wetland plant with compound leaves

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Answers to Laboratory Questions:

3-1 ~ a
3-2 ~ d (but tricky, as petiole is about 1 mm long and margins weakly crenate).
3-3 ~ d