Reminder: Bring one flower and one fruit with you to the Angiosperm lab. Where to collect a flower and fruit?

I selected links that provide images of Angiosperms similar to those observed in laboratory. Review the links as you prepare for lab and as you study for your lab exam.

Reminder: Bring one flower and one fruit with you to the Angiosperm lab. Where to collect a flower and fruit?

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Where to collect a flower and fruit

Before you decide to collect a flower and a fruit, read the lab manual so that you will understand what you will be asked to do with the samples you provide. Among other things, you areasked to determine the kinds and numbers of flower parts present and to classify the type of fruit . These tasks will be easiest if you select a representative flower, one with flower parts (sepals, petals, stamens, pistils) that are easy to recognize. Chrysanthemums, daisys, asters and some other flowers commonly sold, while showy, may be difficult to interpret. Similarly, fruits that have seeds enclosed in chambers may be easy to interpret, while acorns, grains and other fruits may be more challenging.

Weather permitting, I usually take a walk around campus just prior to lab to collect flowers and fruits from trees, bushes and herbs. Often I collect apples from the crab apple tree along Morris ave and nearby I may locate a few flowers of Forsythia and perhaps some dandelion flowers.

Prepare in advance by looking at the examples on the website, illustrations in your text, and illustrations in other reference books.

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Assignment

         Assignment for Laboratory Exercise 15 - Flowering Plants

1.  Collect and bring to laboratory one flower and one fruit
     (they may be from the same or from different plants). Collect
     examples that will be easy to identify and work with in
     class (see the assignment on pages 15.2 and 15.3). Display your
     specimens at your desk.

2.   Display your semester collection of plants, plant parts or
     plant products together with the evaluation sheet (p. xv) and
     progress report (p. xiii).

3.   Examine the semester collections displayed by your
     classmates.

4.  Examine the materials on display. These include living and
     preserved specimens representing diversity and reproductive
     patterns of Flowering Plants.

5.  Learn the major characteristics of Flowering Plants and of
     the two Classes: Monocots and Dicots.

6   Dissect fresh flowers of Snapdragon and Gladiolus and
     identify their parts. Make a floral diagram of each (see
     figure 15.1d).

7.  Work as a group and set up a display representing
     reproduction of Flowering Plants. Each student is responsible for
     finding and displaying one or two specimens demonstrating flower
     structure (1, 2, 3), meiosis and microsporogenesis (4, 5, 6), pollen
     (7,8), megasporogenesis (9,10,11,12), megagametophyte
     development (13),  double fertilization (14), embryo (15, 16) seed
     (17) and fruit (18) development.
 

1	Flower Bud  l.s.
2	Flower Bud t.s.
3	Young Anther
4	Meiosis 1st Division
5	Meiosis 2nd Division
6	Tetrad of Microspores
7	Pollen Grain 2-cell stage
8	Pollen Tube with sperm
9	Ovary with 2 Young Ovules
10	Ovule with Megasporocyte
11	Meiosis
12	First 4-Nucleate
13	Mature Embryo Sac
14	Double Fertilization
15	Lily Embryo
16	Capsella Young Embryo
17	Capsella Seed
18	Fruit

8.   Label and color Figures 15.2. 15.3, 15.4, 15.5, 15.8  and  15.12).

9.   Prepare for the lab practicum.