Topic
- Heliconiaceae8
- Piper8
- Bromeliaceae7
- Lycopodiopsida7
- Foreign relations6
- Fungi5
- Lichens5
- Malpighia5
- Salvinia5
- Salviniaceae5
- Salviniales5
- Tillandsia5
- Bryophyta4
- Bryopsida4
- Dalechampia4
- Housing; Vernacular Architecture; Hogans; Igloos; Log Houses; Wigwams; Cliff Dwellings; Pueblos4
- Hymenophyllum4
- Peperomia4
- Politics and government4
- Polytaenium4