Supplement to Lab Topic 16: Plant Diversity II

[return to lab schedule] [home] [class schedule] [BioPort] [contents]

àPlease observe and draw all displayed specimensß

(keeping in mind that traditionally introductory biology labs require

memorization of specimens for identification at a later date).

Map of Stations

[Front of Room]

1A, 1B, 1C	2A, 2B, 2C	3A, 3B, 3C	4A, 4B, 4C	5A, 5B, 5C
6A, 6B, 6C	7A, 7B, 7C	8A, 8B, 8C	9A, 9B, 9C	10A, 10B, 10C
11A, 11B, 11C	12A, 12B, 12C	13A, 13B, 13C	14A, 14B, 14C	15A, 15B, 15C
16A, 16B, 16C	17A, 17B, 17C	18A, 18B, 18C	19A, 19B, 19C	20A, 20B, 20C

[Back of Room]

Boxes in above table refer to desks.

Materials should be arranged in the order presented in your lab text.

Please let us know if there is a discrepancy or other problems.

Please be aware that you don’t necessary have to begin at station 1.

Please pay attention to suggested microscope magnifications (below)

(too-high magnification can be as misleading as too-low magnification).

Specimen List

Page	Sect.	Section Title	Stat.	Specimen	State	Container	Scope	Comments
420	16.1.A	Divisions of Gymnosperms	1A,B	Pine, various	Dried	Herbarium	None	Do not draw
420	16.1.A	Same as above	1C	Cones, female, w/o seeds	Dried	Zip locks	None	Do not draw
420	16.1.A	Same as above	2A	Ginkgo leaves	Dried	None	None	Draw
420	16.1.A	Same as above	2B	Ginkgo Balboa	Preserved	Bottle	None	Do not draw; do not remove from bottle
420	16.1.A	Same as above	2C	Ginkgo Bilboa???	Dried	Herbarium	None	Do not draw
420	16.1.A	Same as above	3A	Zamia floridana	Living	Pot	None	Draw
420	16.1.A	Same as above	3C	Ephedra trifurca	Dried	Herbarium	None	Don’t draw [ephedrine "Mormon tea" (Google Search)]
422	16.1.B	Pine Life Cycle	4A	Pinus straminate cone, B495 (male cone)	Slide	None	Dissecting	Draw
422	16.1.B	Same as above	4C	Pinus female cone, B500	Slide	None	Dissecting	Draw
422	16.1.B	Same as above	5A	Pne life cycle	Poster	None	None	This is useful for interpreting the specimens
422	16.1.B	Same as above	5A	Pinus ovulate strobili at pollination, PB563 (#2 on poster)	Preserved	Bottle	None	Don’t draw;, do not remove from bottle
422	16.1.B	Same as above	5A	Pinus ovulate strobili second summer, PB563 (#3 on poster)	Preserved	Bottle	None	Draw; do not remove from bottle
422	16.1.B	Same as above	5A	Pinus straminate cones (#8 on poster)	Preserved	Bottle	None	Draw, keep in bottle
422	16.1.B	Same as above	5B	Pine seeds (loose)	Dried	Petri dish	None	Draw
422	16.1.B	Same as above	5B	Cones, female, w/o seeds	Dried	None	None	Do not draw
422	16.1.B	Same as above	5C	Pine mature pollen, 30-1448	Slide	None	Compound	Draw
427	16.2.A	Flower Morphology	6	Flowers	Fresh	None	Dissecting	Follow directions in lab text
430	16.2.B	Pollinators	7	Flowers	Fresh	None	Dissecting	Follow directions in lab text
???	16.2.C	Angiosperm Life Cycle	11A	Lilium anthers, B681	Slide	None	Dissecting	Draw; ID the various structures
???	16.2.C	Same as above	11C	Lilium ovary, B700	Slide	None	Compound	Draw (can you figure out what you are looking at?)
???	16.2.C	Same as above	12A	Lily life cycle	Poster	None	None	Do not draw
???	16.2.C	Same as above	12C	Lily flower	Model	None	None	Do not draw
???	16.2.C	Same as above	13A	Lilium pollen tube, B692	Slide	None	???	Draw
435	16.2.D	Fruits and Dispersal	13C	Germination	Model	None	None	Do not draw
435	16.2.D	Same as above	14A	Peanut dissection (see directions below)	Living	None	Dissecting	Draw
435	16.2.D	Same as above	14C	Apple dissection (see directions below)	Living	None	None	Do not draw
435	16.2.D	Same as above	15, 19, 20	Fruit	Living & Dried	Plates	None	Follow directions in text and Enjoy!
---	---	---	16	Plant/tree books	---	---	---	---

Peanut dissection directions:

· For exercise 16.2, lab study D, we will dissect a peanut ["You can investigate how an embryo grows in a seed by buying a bag of peanuts. Carefully open one of the peanut shells and look closely at the various parts as you munch. The woody peanut shell is actually the fruit formed from the enlarged ovary wall, while the reddish papery coating around each peanut is the seed coat, the wall of ovule. The two oval halves of the peanut are the dried, salted remains of the cotyledons, the thick first leaves of the embryo. The embryos of peanuts and many other plants, including pears, have two cotyledons and are therefore called dicotyledons (dicots). Plants with just one cotyledon---lilies and palms, for example, as well as corn and other grasses, are called monocotyledons (monocots)." (p. 805, Postlethwait and Hobson, 1995)]

Apple dissection directions:

· For exercise 16.2, lab study D, we will also dissect an apple ["The next time you start to eat a pear or an apple, you can apply your knowledge of plant anatomy while examining the food you are eating. Opposite the stem of a fresh pear or apple at the base of the fruit you can probably see the sepals and sometimes the stamens still attached. As you bite into the flesh of the fruit, you are devouring the receptacle, the enlarged base of the flower. When you get to the core of the pear or apple, you will have reached the ovary wall. The oval seeds inside develop from the ovule, and the tough brown seed coat is the mature wall of the ovule." (pp. 803-804, Postlethwaite and Hobson, 1995)]

Choice of containers:

· Concave slide: Use a concave slide when a normal slide will crush the specimen (e.g., Volvox)

· Dish (observe in): Many specimens will need to be removed from their containers to observe; an appropriate dish will be supplied for pouring the specimen into; please use a dish for this purpose only if you are instructed to (Laboratory prep person: please supply dishes and label specimens that should or should not be observed in dishes)

· Dissection pan: Any dissections will be done in a dissection pan; you will obtain specimens for dissections from stations then bring those specimens, in a dissection an, back to your desk; if the specimen is presented to you in a dissection pan, then that specimen should be observed at the station but not extensively dissection (i.e., poking and otherwise manipulating is OK, but cutting, etc., is not)

· Petri dish: Normally a petri dish will be employed if that is what the specimen is supplied in

· Slide (microscope): Use a slide when the specimen is relative small and will be observed using a compound scope

· No container: Some items are suffiently large or are already mounted such that a container is not necessary

Choice of microscopes:

· Compound microscope: Use for observing relatively small specimens

· Dissection (stereoscopic) microscope: Use for observing the fine structure of relatively large specimens

· Phase-contrast microscope: Use for observing especially living bacteria

· No microscope: Some items are sufficiently large or its fine structure sufficiently inaccessible that we will not employ microscopic observation