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Ipomoea aquatica
http://aquat1.ifas.ufl.edu/ipaqpic.html
Images and description of water-spinach, an invasive plant.
Ipomoea batatas
http://www.botany.hawaii.edu/faculty/carr/images/ipo_bat.jpg
Image of the plant and flowers.
Ipomoea batatas
http://plants.usda.gov/cgi_bin/plant_profile.cgi?symbol=IPBA2
Profile of the sweetpotato from the USDA.
Ipomoea horsefalliae
http://www.botany.hawaii.edu/faculty/carr/images/ipo_hor.jpg
Closeup and magnified photograph of the flower.
Ipomoea pes-caprae
http://www.botany.hawaii.edu/faculty/carr/images/ipo_pes.jpg
Photographs of the plant in flower.
Ipomoea quamoclit
http://www.floridata.com/ref/i/ipom_qua.cfm
Description, image, and cultivation.