Last modified on 15 September 2008, at 00:57

Botany/Plant structure laboratory

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

Chapter 3. Plant Structure LaboratoryEdit

LeavesEdit

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