Volume 27 deals with Cyperaceae subfamilies Mapanioideae and Cyperoideae and the tribes Schoeneae and Sclerieae.
1. Subfamily Mapanioideae
2. Tribe Chrysitricheae
3. Lepironia
4. Tribe Hypolytreae
5. Hypolytrum
6. Mapania
7. Scirpodendron
8. Subfamily Cyperoideae
9. Tribe Schoeneae
10. Cladium
11. Machaerina
12. Rhynchospora
13. Schoenus
14. Tribe Sclerieae
15. Scleria
16. Index to botanical names