INDEX 



305 



wintergreen 174 

 Creeping 175 



wintergreen fam- 

 ILY 174 



Winter Sage 77 

 Wire-grass 25, 40, 51 

 Witch-grass 24 



WOAD 98 



Wolf-berry 220 

 wolfsijan'e 94 

 Wolfs Bean 131 

 Woodbine 154 

 WOODL.A.ND Star 111 

 Wood Or( hid 59 

 Wood-rush 52 

 Wood Sage 202 

 Woodsia 281 



Wood-sorrel 149 



Wood-sorrel Fam- 

 ily 149 



Woolly Yellow 

 Daisy 257 



Wormwood 260 

 Roman 224 



Wyethia 254 



XanthJum 224 

 Ximenesia 255 

 Xerophyllum 50 

 Xylophacos 142 

 Xylorriza 240 

 Xylosteiim 220 



Yamp 168 



Yarrow 259 

 YteLLOw Bell 55 

 Yellow Flax 149 

 Yellow Pea 131 

 Yellow Philox 102 

 Yellow Pond Lily 



86 

 Yellow Rattle 217 

 Yellow Rose 123 

 Yellow Saxifrage 



114 

 Yellow Water- 

 cress 101 

 Yellow Wood-sor- 

 rel 149 

 Yerba Buena 204 

 Yerba Santa 192 



Yew 18 



Yew Family 18 

 Youngia 275 

 Yucca 56 

 Yucca Family 56 



ZanichelUa 20 

 ZANNICHELLIA- 



CEAE 19 

 Zauchneria 163 

 Zinnia (64) 253 

 Zizia 169 

 Zosterella 50 

 Zygadenus (6, 6) 50 

 ZYGOPHYLLACE- 



AE 150 

 Zygophyllidium 151 



FLORA 



of the 



Rocky Mountains and Adjacent Plains 



containing descriptions of the native and naturalized flowering plants 

 and fernworts, growing in 



Colorado, Utah, Wyoming, Idaho, 

 Montana, Saskatchewan, Alberta, 



and the neighhoring parts of 



Nebraska, South Dokota, North 

 Dakota and British Columbia 



by 



P. A. RYDBERG, Ph.D. 



Curator, New York Botanical Garden 



Published by the author. Price $3.75, net. 



Address: 3304 Rochambeau Avenue, New York City. 



After more than twenty-five years of study of the Flora of the Rocky Mountain 

 region and seventeen years after the first description was drawn, the author has 

 presented this work to the public. The Flora is a book of XII+1110 pages octavo 

 and contains the descri])tion of 1038 genera and 5897 species of plants, of which 

 respectively 13 and 43 are proposed as new, together with keys to families, genera 

 and species. The introduction contains also a history and scope of the work, in- 

 formations concerning nomenclature, pronunciation and accentuation of scientific 

 names, names of authors, common names, distribution, altitudes and life zones, 

 and tables of abbreviations, etc. The appendices give a summary, a list of new 

 genera, new species and new combinations published, a list of the authors of the 

 scientific names, a glossary ot tlie bt>tt.;n):c.-j,l,terms. and an index to Latin and Eng- 

 lish names. ' ' ' . 



