| 31. | The leaf features a mid rib and two other lateral veins, giving a three veined appearance.
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| 32. | The mine has the form of an elongate, tentiform, underside mine between two lateral veins.
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| 33. | Small foveolae ( raised hairy bumps ) appearing at the junction of the midrib and larger lateral veins.
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| 34. | The main midrib of the leaf is raised on both sides, as are the many lateral veins.
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| 35. | At the other end, the lateral veins form into an intramarginal vein, which circles the leaf.
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| 36. | They create a lower-surface, long and narrow tentiform mine, usually between two lateral veins.
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| 37. | In " Ostrya ", the mine is shorter and less constrained by the lateral veins.
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| 38. | They create a lower-surface tentiform mine, usually in the axle of a thick lateral vein.
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| 39. | The sori are round and small, occurring in on both sides of lateral veins of the leaves.
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| 40. | The mine is constrained between two veins or, less frequently, a lateral vein and the leaf margin.
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