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Basic Dichotomous Key: A Guide to Easy Pollen Identification
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1. Spines present on outside |
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2. Spines very long |
Aster |
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2. Spines shorter yet still easily observable |
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1. Spines absent on outside |
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3. Pores and/or furrows present |
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4. Both pores and furrows present |
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5. 4 pores and furrows |
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5. 3 pores and furrows |
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6. Surface has web like appearance |
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6. Surface has normal appearance |
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7. Area between pores enlarged |
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7. Area between pores normal |
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8. Area under the pore very enlarged |
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8. Area under the pore slightly enlarged |
Beech |
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4. Pores or furrows |
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9. Furrows |
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10. 4 furrows and is diamond shaped with furrows at the points and the area below the furrows are enlarged |
Ash |
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10. 3 furrows |
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11. Bump in the middle of each furrow present |
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11. Bump in the middle of each furrow absent |
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12. Wide furrows and looks like a biohazard sign |
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12. Normal furrows and looks like oaks without bumps |
Sycamore |
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9. Pores |
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13. Shape triangular |
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14. Area above the pores enlarged |
Hickory |
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14. Area above the pores normal |
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13. Shape not triangular |
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15. More than 3 pores present |
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16. Between 4 and 6 pores present |
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17. Size small (<19 um) and 4 pores |
Nettle |
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17. Size large (>20 um) |
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18. 5 pores with area above and below the pores enlarged |
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18. 4 to 6 pores with area below the pores enlarged |
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16. More than 6 pores present |
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19. Area below the pores enlarged |
Hackberry |
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19. Area below the pores normal |
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20. Pores on top and pores on the bottom absent |
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20. Pores even distributed |
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21. Pores number less than ten |
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21. Pores greater than 10 and looks like a golf ball |
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15. 3 pores or less |
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22. One or two pores |
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23. Two pores |
Mulberry |
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23. One pore |
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24. Area above the pore enlarged |
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24. Area above the pore normal and possibly 4 cells in a group |
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22. Three pores |
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25. Area below the pores enlarged |
Hemp |
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25. Area above and below the pore enlarged |
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3. Pores and/or furrows absent |
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26. Grains look like Mickey Mouse ears |
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26. Grains have normal appearance |
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27. Middle of the grain is star shaped |
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27. Middle of the grain is circular |
