Zamia encephalartoides
Large species whose leaves have leaves with smooth petioles; found in Santander, Colombia.
http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/taxon.pl?name=Zamia+encephalartoides

Coccoloba uvifera: The Leaves and a Parasite
Photographic study by Walter Dioni of the Sea Grape or Beach Grape tree and the midge whose larvae cause galls on its leaves.
http://www.microscopy-uk.org.uk/mag/artjul04/wdcocco.html

Neural Network Leaves Recognition
Neuronal network based recognition system of leaf images
http://damato.light-speed.de/lrecog/

Image
leaves
http://www.csdl.tamu.edu/FLORA/Fern&Gym/F&G033.jpg

Ficus benghalensis
Photograph of leaves.
http://www.dipbot.unict.it/orto/0149-1.html

Colocasia antiquorum
Photographs of flowers and leaves.
http://www.dipbot.unict.it/orto/0947-1.html

Washingtonia filifera
Image showing leaves.
http://www.dipbot.unict.it/orto/0098-1.html

Acer oblongum
Images of leaves and fruit.
http://www.dipbot.unict.it/orto/0011-1.html

Betula lenta
The University of Tennessee, Knoxville was founded in 1794 and was designated the state land-grant institution in 1879. The University now has nearly 26,000 students and 400 academic programs.
http://tenn.bio.utk.edu/vascular/database/vascular-photos-enlarge.asp?CategoryID=Dicots&FamilyID=Betulaceae&GenusID=Betula&SpeciesID=lenta&PhotoNameID=be_lent1&PhotographerNameID=Wofford%20and%20Chester

Chorisia insignis
Image of flower and leaves.
http://www.dipbot.unict.it/orto/0061-1.html