Humulus lupulus, hops, Cannabaceae, diagram of plant with flowers and fruits

Eupatorium rugosum, white snake root, Asteraceae, plants in flower

Encelia farinosa, Asteraceae, plants in flower

Ageratum houstonianum, Asteraceae, plants in flower

Hevea brasiliensis, native rubber, Euphorbiaceae, plantation

Parthenium argentatum, guayule, Asteraceae, plants

Manilkara (Achras) sapota, sapote, Sapotaceae, flower and fruits

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© David S. Seigler, Integrative Biology 425, Plant Secondary Metabolism, Department of Plant Biology, 265 Morrill Hall, 505 S. Goodwin Ave., University of Illinois, Urbana, Illinois 61801, USA. 217-333-7577. seigler@life.uiuc.edu.