Yam Family. Comprised of 4 genera and 870 species of herbaceous or woody vines and shrubs, distributed throughout tropical and warm temperate regions. Member of this family have thick, sometimes woody roots or tuber-like underground stems and net-veined, often heart-shaped leaves that are sometimes lobed.

Teasel Family. Comprised of 11 genera and about 350 species of perennial or biennial herbs and shrubs. Flowers are bisexual and slightly irregular, clustered in a dense head. There are five sepals, four to five united petals and four stamens.

Freshwater Bivalve Family. Comprised of 4 genera of small freshwater mussels and aquatic bivalve mollusks that attach themselves to stones or other hard surfaces using a byssus.