Botany/Plant structure laboratory

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

Leaves
Ludwigia palustris (Onagraceae)([[media:leaves_opposite.jpg|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

<< Chapter 3

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