| California Oak Mortality Task Force: Addresses the issue of elevated levels of oak mortality through research, management, education and public policy. Contains monthly updates, distribution maps, symptoms, and educational materials. |
| California Oaks: Descriptions and pictures of the oaks native to California from Las Pilitas Nursery. |
| California Oaks Foundation: Non-profit educational organization committed to preserving the state's oak forest ecosystem and its rural landscapes. |
| Common Oaks of Florida: Descriptions and illustrations of 19 species. |
| International Oak Society: Nonprofit organization dedicated to encouraging the study and cultivation of the true oaks (genus Quercus). News, events, and publications. |
| Key to the Species of Oaks Native to Middle Tennessee: Summer key for 19 species. Includes images of leaves and acorns. |
| Oak Key: Identification keys based on characteristics of acorns or twigs for 12 New England species. |
| Quercus cerris L.: Collection of pictures of the Turkey oak. |
| Quercus coccifera: Photographs of flowering leafy shoots. |
| Quercus fontanesii: Image of foliage and catkins. |
| Quercus havardii: Information on distribution and occurrence; value and use; characteristics; and fire ecology. |
| Quercus incana: Distribution and occurrence; value and use; characteristics; and fire ecology. |
| Quercus nigra: Distribution and occurrence; value and use; characteristics; and fire ecology. |
| Quercus oblongifolia: Information on distribution and occurrence; value and use; characteristics; and fire ecology. |
| Quercus palustris: Distribution and occurrence; value and use; characteristics; and fire ecology. |
| Quercus petraea: Collection of pictures of leaves, acorns, buds of Quercus petraea (Mattuschka) Liebl. |
| Quercus pungens: Information on distribution and occurrence; value and use; characteristics; and fire ecology. |
| Quercus shumardii: Distribution and occurrence; value and use; characteristics; and fire ecology. |
| Quercus wislizenii: Distribution and occurrence; value and use; characteristics; and fire ecology. |
Classical
