Explanation of Plate II. 



1. Ranunculus fascicularis p. 130. 



2. Achenes of Ranunculus re pens p. 129. 



3. Achenes of Ranunculus septcntrionalis p. 130. 



4. Achenes of Ranunculus recurvatus p. 126. 



5. Ranunculus dclphinifolius p. 121. 



6. Achenes of Ranunculus dclphinifolius p. 121. 



6a. A single achene of Ranunculus dclphinifolius p. 121. 



7 and la. Achenes and a single achene of Ranunculus purshii . p. 122. 



8 and 8a. Achenes and a single achene of Ranunculus abortivus . p. 124. 

 9. Achenes of Ranunculus pennsylvanicus p. 127. 



10. Flowers and leaves of Batrachium tricophyllum p. 131. 



11. Achenes of Batrachium trichophyllum p. 131. 



12. Achenes of Batrachium divaricatum p. 132. 



13. Oxygraphis cymbalaria p. 133. 



14. Head of fruit of Oxygraphis cymbalaria p. 133. 



15. Myosurus minimus p. 120. 



