LIST OF PLATES. 



Plate Page 



1. Painted flowers of Aeonitum and Delphinium Frontispiece 



2. Life-history of the flowers of Aeonitum columbianum and Delphinium scopulorum, 272 



3. Life-history of Rubus strigosus and Potentilla gracilis 272 



4. Life-history of Heracleum lanatum and Sedum stenopelatum 272 



5. Life-history of Galium boreale and Saxifraga bronchialis 272 



6. Life-history of Campanula rotundifolia and Erysimum asperum 272 



7. Life-history of Geranium caespitosum and Dodecatheon meadia 272 



8. Life-history of Chamaenerium angustijolium 273 



9. Life-history of Pachylophus caespitosus 273 



10. Life-history of Pirola elliptica, Frasera speciosa, and Gentiana amarella 273 



11. Life-history of Gilia aggregata and pinnatifida, Mertensia sibirica, and Lithosper- 



mum multiflorum 273 



12. Life-history of Pentstemon glaber 273 



13. Life-history of Castilleia miniata and Monarda fistulosa 273 



14. Life-history of Allium cernuum and Zygadenus elegans 274 



15. Mutilated and inverted flowers of Aeonitum 274 



16. Mutilated flowers of Aeonitum, Delphinium, and Monarda 274 



17. Mutilated flowers of Geranium, Chamaenerium, and Pentstemon glaber 274 



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