Transcript Herbarium & Dichotomous keys - Chemistry-i

SI Session
Handout
Herbarium
Dichotomous keys
Spring 2010
For Dr. Hughey’s Bio 3 Class
Designed by Pyeongsug Kim ©2010 [email protected]
Picture from Pyeongsug’s Herbarrium,
http://dj003.k12.sd.us/science%20labs/scientific%20naming/wacky_people
_dichotomous.htm
How to Identify plants?
1) Ask Botanist
2) Find botany book and compare the
picture
3) Use a dichotomous key
4) Use the herbarium
5) Genetics(DNA) analysis
Picture from The field trip Spring2009 http://www.flickr.com/photos/davis_boyz/3433538674/
Designed by Pyeongsug Kim, ©2009
Herbarium
Designed by Pyeongsug Kim, ©2009
How to Make Algal Herbarium
Place the algae on a blotter (2) and cover them
with cloth or muslin (3 - so that they stick only to
paper) place another blotter (4) on top place
corrugated cardboard spacers (1) on top &
bottom to help dry your "sandwich".
Picture from http://www.botany.hawaii.edu/BOT201/Algae/how_to_make_your_own_algal_herba.htm
Designed by Pyeongsug Kim, ©2009
Just joke! Please, don’t take
seriously..
Wacky People Key
1. Two feet …………………………………2
1. Some other number of feet ………………3
2. Does not look at all human …………4
2. Looks a lot like a human ……………5
3. One leg …………………………………...6
3. Three or four legs ………………………..7
4. Fly-like ……………………Mosk Cara
4. Not fly-like ………………………….8
5. Seems to be a girl ……………………Rita Nita
5. Not a girl………………………………….9
6. Leg is curled , two feet ………Ru-ela.Brella
6. Leg is straight, one foot………Giggles
7. Three legs ……………………………….10
7. Four legs ………………………………..11
8. Has webbed feet ………………Hex Oculate
8. Clawed feet ………………………….12
9. Curly hair, no toes ………………..Lugio Wirum
9. Wiggly looking mouth, three toes on feet…..C. Nile
10. Very long nose, open mouth ………….Elle E. Funk
10. Some other appearance ……………….13
11. Has duck bill, two pinchers ………………..Tri D. Duckt
11. No arms or pinchers ……………………….14
12. Has ears, tail, and beak ………………..Grif Leon
12. Four eyes on stalks ……………………Eggur Ondy
13. One eye, webbed feet ……………………...Cue Kide
13. Four stalked eyes, four pinchers …………..Quadrumenox
14. Three toed feet, nose like a flower ……Tunia petalos
14. Spider-like, has spots …………Patterned mulywumpus
From
http://dj003.k12.sd.us/science%20labs/scientific%20naming/wacky_people_dichotomous.htm
Dichotomus Keys
:a tool that allows the user to determine the identity of items.
In constructing keys, keep the following in mind:
•Use constant characteristics rather than variable ones.
•Use measurements rather than terms like "large" and "small".
•Use characteristics that are generally available to the user of
the key rather than seasonal characteristics or those seen only
in the field.
•Make the choice a positive one - something "is" instead of "is
not".
•If possible, start both choices of a pair with the same word.
•If possible, start different pairs of choices with different words.
•Precede the descriptive terms with the name of the part to
which they apply.
Designed by Pyeongsug Kim, ©2009
Dichotomus Keys
1. Edges grated ……..2
1. Edges smooth ……..3
2. Diameter 24.26 mm ……. 25 ¢
2. Diameter 17.91 mm ……. 10 ¢
3. Color brown ……. 1 ¢
3. Color silver ……. 5 ¢
Designed by Pyeongsug Kim, ©2009
Dichotomus Keys
Please, Don’t…..
1. Size largest …….. 25 ¢
1. Size smallest ……..10 ¢
Use measurements rather than terms like "large" and "small".
1. Diameter 24.26 mm ……. 25 ¢
1. Diameter 17.91 mm ……. 10 ¢
2. Diameter 17.91 mm ……. 10 ¢
2. Color brown
……. 1 ¢
Use same traits
2. Color silver
2. Color brown
……. 10 ¢
……. 1 ¢
Designed by Pyeongsug Kim, ©2009
Dichotomus Keys
Juglans nigra
Try it! so fun! 
http://www.dnr.state.wi.us/org/caer/ce/eek/veg/treekey/index.htm
Designed by Pyeongsug Kim, ©2009
Dichotomus Keys
Designed by Pyeongsug Kim, ©2009
A
B
C
D
1. Leaves flat ---------------------------------- 2
1. Leaves needle-like or scale-like ------ 3
C
2. Outline of leaf oval-shaped ...........____
B
2. Outline of blade star-shaped .........____
3. Length of leaf more than 1cm long ---------- 4
3. Length of leaf less than 0.5 cm long ---------- _____
D
E
4. Blades arranged in cluster ------------------------ _____
4. Blades scattered or alternated--------------------_____
A
http://kirbypl.wilkes.edu/needle.html
Designed by Pyeongsug Kim, ©2009
E