| 1. | The upper surface is glossy, contrasting with a pale undersurface.
|
| 2. | Letterboxes and the undersurface of toilet seats are common sites.
|
| 3. | Front undersurface is slightly pointed and sharply cut away below.
|
| 4. | The undersurface of the abdomen is black, with two white spots.
|
| 5. | The leaflets have prominent veins on both upper and undersurfaces.
|
| 6. | Stomata occur either on both surfaces or undersurface only.
|
| 7. | The undersurface of the hindwings is almost uniform brown.
|
| 8. | The leaf undersurface is covered with white hair.
|
| 9. | Leaf venation is more evident on the undersurface.
|
| 10. | The undersurface of the fruit body is made up of tubelike pores rather than gills.
|