Systematics is the study of the diversity of organism characteristics. In biology, systematists are the scientists who classifyspecies and other taxa, which they do with aim of defining how they relate evolutionarily.
Gnetophyta A few images of each family. http://www.science.siu.edu/landplants/Gnetophyta/gnetophyta.html
Phylum Gnetophyta (Vessel Bearing Gymnosperms) Characteristics of the group, with representative images. http://botit.botany.wisc.edu/courses/systematics/Phyla/Gnetophyta/Gnetophyta.html
Help build the largest human-edited directory on the web.
