Plants & Human Affairs
Cherries.wmf (7140 bytes) Plants & Human Affairs (BIOL106)  -  Stephen G. Saupe, Ph.D.; Biology Department, College of St. Benedict/St. John's University, Collegeville, MN 56321;;

Pre-Lab: Deciduous Trees & Shrubs


  1. Print a copy of the Checklist to Trees & Shrubs and bring a copy to lab.

  2. Be prepared to spend the lab period outdoors.  Dress appropriate, apply sunblock and insect repellent as necessary (available in Bailey Herbarium)

  3. Read the Deciduous tree lab and then answer the questions below.


  1. In the space below, complete the sketches for Figure 1 and Figure 2.









Fig. 1.  Sketch of a twig with 4 simple leaves, each leaf with an entire leaf margin.  The leaves are attached to the stem alternately Fig. 2. Sketch of a pinnately compound leaf with 7 leaflets; each leaflet has a serrate leaf margin
  1. How can you tell the difference between a tree and shrub?


  2. What is the foolproof method to distinguish between a simple leaf and a compound leaf?


  3. What is a bud?


  4. Name the family of woody plants at CSB/SJU that is represented by the greatest number of species (hint: see the checklist of species available on the web).


  5. Name the genus of woody plants at CSB/SJU that is represented by the greatest number of species.

:  write the appropriate species in the blank


warty bark

2 acorns
3 opposite leaves, winged fruits that occur in pairs
4 baseball bats
5 good for carving and honey
6 palmately compound leaves, large brown seed
7 introduced shrub that has escaped into our woodlands
8 large heart shaped leaves, hard seeds attached to modified leaf
9 white or grayish peeling bark
10 heart-shaped leaves, long thin brown pods

produces cyanide, glands on the leaf stalk


veins cobwebby when broken


have veins that run to tip of the leaf  (2 possible answers)

14 thorns on trunk of native tree, cultivated variety unarmed, compound leaves,
15 understory tree with fruit clusters that look like flavoring produce for beer

huge leaves, doubly compound, salmon-colored pith, hard seeds make a beverage

17 shrub whose twigs are chewed to relieve a toothache (2 possible answers)
18 elongated pods that were probably dispersed by mastodons
19 fruit cluster makes a lemonade substitute
20 seeds are eaten, husk and bark used to make a vegetable dye
21 common prairie tree, around farmsteads (more than one possible answer)
22 often infected with a "witches broom"

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Last updated:  09/08/2005 / � Copyright  by SG Saupe