1. Dandelion Pollen

2. Dogwood Pollen

3. Daffodil Pollen

4. Gardenia Pollen

5. Magnolia Pollen

6. Red Bud Pollen

7. Rose Pollen

8. Snapdragon Pollen

9.
Sunflower Pollen

10.
Ragweed Pollen

11.
Birch Pollen

12. Pine Pollen

13. Bermuda Grass Pollen

14. Answer key for pollen SEM images
Specimen
Scale bar size (um)
Scale bar size (cm)
Pollen size (cm)
Pollen size (um)
Method of dispersal
Allergen?
shape
Dandelion 10
4.3 14
32.6
insect no
spikey ball
Dogwood
19.5
45.3
football
Daffodil 50 3
50.0
taco
Gardenia 20
3.4 7
41.2
lumpy sphere
Magnolia
4.6 9
97.8
mild-low exposure
Red Bud
3.6 6
33.3
rod
Rose
8.5
28.3
Snapdragon
3.1
9.5
30.6
Sunflower 5
23.3
yes-but low exposure
Ragweed 11
18.3
wind
yes
Birch
14.5
24.2
smooth round
Pine
3.7
51.4
no-too big
smooth lobes
Bermuda Grass
2.6
smooth deflated ball
*longest dimension