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Table II
Mean percent cover (± standard error [SEM]) of plant species in the mixed oak forests for which the percent cover exceeded 2%. Laurus nobilis was included because of its high frequency.
| Plant species | Cover % | Frequency |
|---|---|---|
| (mean ± SEM) | ||
| Trees | ||
| Alnus glutinosa (L.) Gaertner | 3.3 ± 3.3 | 1 |
| Betula celtibericaa L. | 5.0 ± 3.2 | 2 |
| Castanea sativa Miller | 9.1 ± 4.6 | 3 |
| Fraxinus excelsior L. | 5.0 ± 3.5 | 3 |
| Laurus nobilis L. | 0.8 ± 0.1 | 3 |
| Quercus pyrenaica Willd. | 3.7 ± 3.7 | 1 |
| Quercus robur L. | 41.7 ± 14.1 | 7 |
| Robinia pseudoacacia L. | 4.0 ± 1.7 | 3 |
| Salix atrocinerea Brot. | 5.3 ± 3.5 | 2 |
| Shrubs | ||
| Cornus sanguinea L. | 3.0 ± 0.8 | 3 |
| Corylus avellana L. | 31.0 ± 11.9 | 5 |
| Crataegus monogyna Jacq. | 4.1 ± 3.9 | 5 |
| Frangula alnus Miller | 3.1 ± 1.5 | 3 |
| Rhamnus alaternus L. | 6.5 ± 6.0 | 2 |
| Rubus sp. | 8.8 ± 2.2 | 7 |
| Ulex gallii Planchon | 8.9 ± 7.1 | 5 |
| Climbers | ||
| Hedera helix L. | 15.4 ± 9.7 | 6 |
| Ferns | ||
| Dryopteris affinis (Lowe) | 5.1 ± 3.6 | 3 |
| Fraser- Jenkins | ||
| Polystichum setiferum | 5.5 ± 4.1 | 2 |
| (Forsskål) Woynar | ||
| Pteridium aquilinum (L.) Kuhn | 3.3 ± 1.7 | 4 |
| Herbs | ||
| Poaceae | 17.6 ± 6.5 | 7 |
| Smilax aspera L. | 10.2 ± 6.6 | 6 |