Explanation of Plate I. 



1. Fruit of Hydrastis canadensis p. 96. 



2. Pods of Isopyrum biternatum p. 99. 



3. Pods of Caltha palustris p. 98. 



4. Fruiting- raceme of Actaea alba p. 101. 



5. Fruiting raceme of Actaea rubra p. 100. 



6. Flower of Aquilegia canadensis p. 102. 



7. Follicles of Aquilegia canadensis p. 102. 



8. Follicles of Delphinium ajacis p. 106. 



9. Follicles of Delphinium carolinianum p. 104. 



10. Follicles of Delphinium tricorne . p. 103. 



11. Flower of Delphinium tricorne grandiflorum p. 104. 



12. Head of fruit of Anemone cylindrica p. 108. 



13. Head of fruit of Anemone virginiana p. 109. 



14. Head of fruit of Anemone canadensis p. 110. 



15. An achene of Anemone canadensis p. 110. 



16. Head of fruit of Anemone quinquefolia p. 101. 



17. Achenes and involucre of Hepatica acuta p. 112. 



18. Achenes of Syndesmon tha/icfroides p. 114. 



