562 



18. Equisetaceae, Horsetails. — Gen. Equisetnm. 



19. Andrgeaceae, Splitmosses. — Gen. Audraea. 



20. Bryacese, Urnmosses. — (Musci). 



Alliance 5. Lycopodales. — The Lycopodal Alliance. 



21. Lycopodiaceae, Clubmosses. — Gen. Lycopodium. 



22. Marsileaceae, Pepperv^orts. Gen. Pilularia, Isoetes. 

 Alliance 6. Filicales. — The Filical Alliance. 



23. Ophioglossaceae, Adders' Tongues. — Gen. Ophioglossum, 

 Botrychiura. 



24. Polypodiaceae, Ferns. — Gen. Osmunda; with all the dor- 

 siferous ferns of Britain. 



Class 3. Rhizogens. 



(N. B. — The only class which has no British species to represent 

 it, and which includes only fifty-three described species in the whole. 

 This class is not divided into alhances, consequently the numbers of 

 the latter are uninterrupted by the omission of the three orders of the 

 Rhizogens). 



Class 4. Endogens. 



Alliance 7. Glumales. — The Glumal Alliance. 



29. Graminaceae, Grasses. 



30. Cyperaceae, Sedges. 



33. Eriocaulacege, Pipeworts. — Gen. Eriocaulon. 

 Alliance 8. Arales. The Aral Alliance. 



34. Pistiaceae, Lemnads, or Duckweeds. — Gen. Lemna. 



35. Typhaceae, Typhads, or Bullrushes. — Gen. Typha. Spar- 



ganium. 



36. Araceae, Arads. — Gen. Arum, 

 Alliance 9. Palmales. — The Palmal Alliance. 

 Alliance 10. Hydrales. — The Hydral Alliance. 



39. Hydrocharidaceae, Hydrocharads. — Gen. Stratiotes, Hy- 



drocharis. 



40. Naiadaceae, Naiads. — Gen. Zannichellia. 



41. Zosteraceae, Seawracks, — Gen. Zostera. 

 Alliance 11. Narcissales. — The Narcissal Alliance. 



46. Amaryllidaceae, Amaryllids. — Gen. Galanthus, Leucojum, 

 Narcissus. 



47. Iridaceae, Irids. — Gen. Tris, Trichonema, Crocus. 

 Alliance 12. Amomales. — The Amomal Alliance. 



