in the LycopodiaccEe, Equisetacese, &c. 441 



Fruit whorls 5, alternate, showing 10 vertical rows of opened 

 carpels. Divergence = -p^. 



19. C. (sp.). Swan River. Leaves in whorls of 6, alternate. 

 Divergence = ~. 



20. C. (sp. with spinous, slightly twisted leaves). Swan 

 River. Leaves in whorls of 4, alternate. Fruit whorls of 4, 

 alternate, showing 8 vertical rows of carpels. Divergence = ^. 



2L C. (sp.). Swan River. Leaves in whorls of 9, alternate. 

 Fruit whorls of 9, ditto. Divergence = ^jr. 



22'. a Hugeliana (35 feet high). Mount Brown, 900 feet. 

 Leaves in whorls of 8, alternate. Divergence = y'^. 



23. C. (sp.). West Australia, between Perth and King George's 

 Sound. Leaves in whorls of 7, alternate. Fruit whorls ditto. 

 Divergence = ^. 



24. C. (sp.). W. Australia. Leaves in whorls of 8, alternate. 

 Fruit whorls ditto. Divergence = ^. 



25. C. rigida. Port Phillip. Leaves in whorls of 7, alternate. 

 Diverirence = ^. 



26. C. a'istata. Avoca. Leaves in whorls of 12, alternate. 

 Divergence = t^. 



27. C. rigida. Sealer's Cove. Leaves in whorls of 8, alter- 

 nate. Divergence = j^. 



28. C. (sp.). Common " She Oak" of Cape Riche, forming a 

 large tree. Cape Riche, West Australia. Leaves in whorls of 

 10, alternate. Fruit whorls ditto. Divergence = ^. 



29. C. (sp.). Cape Riche, W. Australia. Leaves in whorls of 

 9, alternate. Fruit whorls ditto. 



30. C. (sp.). Vavau and Lifuka, Friendly Islands. Leaves 

 in whorls of 7, alternate. Fruit whorls ditto. Divergence = Yf 



31. C. (sp.). Near Cape Riche, W. AustraUa. Leaves in 

 whorls of 5, alternate. Fruit whorls ditto. Divergence = —n' 



32. C. (sp.). Between King George's Sound and Cape Riche. 

 Leaves in whorls of 9, alternate. Divergence = -j^. 



33. C. (sp.). Between King George's Sound and Cape Riche. 

 Leaves in whorls of 5, alternate ; leaf-scars on old stem and 

 twigs very Lepidodendriform and quincuncial. Fruit whorls of 5, 

 alternate. Divergence = ^ir- 



34. C. (sp.). Near Cape Riche, W. Australia. Leaves in 

 whorls of 5, alternate. Leaf-scars of stem well marked. Fruit 

 whorls of 5, alternate. Divergence = -y^. 



On comparing the numbers of leaves in the whorls, it appears 

 that they may all be reduced to the following — 



4, 5, 6, 7, 8, 9, 10, 12, 



the favourite numbers being 5, 7, and 8. The angles of diver- 

 gence are dencjted by the reciprocals of these numbers, doubled. 



