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Cotton: The Fabric of Our Lives
http://www.siu.edu/~ebl/leaflets/cotton.htm
Characteristics of Gossypium and history of human use.
Gossypium barbadense
http://www.botany.hawaii.edu/faculty/carr/images/gos_bar.jpg
Photograph of foliage and opening boll.
Gossypium hirsutum
http://www.hort.purdue.edu/newcrop/duke_energy/Gossypium_hirsutum.html
Description and uses of cotton.
Gossypium tomentosum
http://www.botany.hawaii.edu/faculty/carr/images/gos_tom.jpg
Photograph of leaves and flower.