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Science, engineering, and mathematics — biology, chemistry, physics, astronomy, earth sciences, social sciences, and technology research. A curated gateway to academic and professional scientific resources.
57129 resources
Includes revised species concepts and cultivar groups.
Describes physical characteristics and habitat. Provides photos of entire tree, leaves, cone, and bark.
Features photos of entire tree, leaves, cones, and bark. Describes physical characteristics, habitat, and human uses.
Description of the genus and its 8 species.
Tree identification fact sheet with photos of the leaf, flower, fruit, twig, bark and form.