Illustrations xvii 



FACING PAGE 



26 Atragene columbiana Nutt. Purple 



Virgins-Bower ;-,;,- ; , , . ., , . 90 



27 Ranunculus saxicola Rydb. ; - . 100 

 27 Ranunculus alpeophilus. A Nels. . 100 



27 Ranunculus Eschscholtzii Schl. Snow 



Buttercup . . . . . .100 



28 Ranunculus eremogenes Greene. 



Ditch Crowfoot . . . .98 

 28 Ranunculus Purshii Richards. Pursh's 



Buttercup . . . .98 



28 Ranunculus inamcenus Greene . . 98 



29 Thalictrum megacarpum Torr . . 96 



29 Thalictrum occidentale A. Gray. 



Western Meadow- Rue . . .96 



30 Delphinium Menziesii DC. Blue 



Larkspur . . \v: . .no 



30 Lithophragma parviflora (Hook.) 



Nutt. Lithophragma . . .no 



31 Physaria didymocarpa (Hook.) A. 



Gray. Bladder-Pod . . . 116 



31 Smelowskia calycina (Desv.) C. A. 



Meyer. Smelowskia . . .116 



32 Draba oligosperma Hook. Whitlow- 



Grass . . . . . 112 



32 Draba andina (Nutt.) A. Nels. 



Mountain Whitlow-Grass 112 



