ILLUSTRATIONS. 



PLATES. 



Page. 

 A typical inountain stock range. From Bridger Peak, looking east. . . Frontispiece. 



Plate I . Death camas {Zygadenits venenosus) 51 



II. Tall larkspur ( Delphinium glaucum) 67 



III. Wild geranium {Geranium viscosissimum) 66 



lY. Purple larkspur ( Delphinium bicolor) ' 73 



V. Purple larkspur {Delphinium bicolor), young plants 79 



VI. Red false mallow {Malvastrum coccineum) 78 



VII. Wyoming water hemlock {Cicuta occidentalis) 81 



VIII. Wyoming water hemlock ( Cicuta occidentalis), young plant . . 80 



IX. White loco weed {Aragallus spicatus), in flower 87 



X. White loco weed {Aragallus spicatus), in fruit 86 



XI. Silvery loco weed {Aragallus splendens) 100 



XII. Purple loco weed {Aragallus besseyi) 101 



XIII. Purple loco weed {Aragallus lagopus) 100 



XIV. Lupine ( Lrqnnus leucophyllus) 101 



XV. Lupine ( Lupinus sericeus) 100 



XVI. Ergot ( Claviceps purpurea) , in heads of wild rye grass Ill 



XVII. Cow cockle ( Vaccaria vaccaria) 113 



XVIII. Swamp camas {Zygadenus elegans) 117 



XIX. Showy milkweed {Asclepias speciosa ) 118 



XX. Black henbane {Hyoscyamus niger) 124 



XXI. Prairie fennel {Lomatium montanum) 127 



XXII. Prairie fennel ( Lomatium platycarpum) ■. 126 



XXII I. Prairie fennel {Musineon hookeri) 127 



XXIV. Plains Cymopterus ( Cytnoptems acaidis) 126 



XXV. Mountain false lupine ( Thermopsis montana) 127 



XXVI. Synthyris {Synthyris rubra) 129 



XXVII. Western wild cherry {Prunus demissa) 131 



XXVIII. Baneberry {Actaea eburnea) 132 



XXI X. Arnica {Arnica monocephala) 136 



XXX. Yellow Eriogonum {Eriogonum flavum) 140 



XXXI. Scarlet Gaura {Gaura coccinea) 140 



XXXII. Pink-flowered wild onion {Allium brevistylum) 141 



XXXII I. Wild hyacinth {Leucocrinum montanum ) 143 



XXXIV. Wild sunflower {Balsamorhiza sagittata) 146 



XXXV. Low milk vetch ( Orophaca caespitosa ) 148 



XXXVI. False esparcet {Astragalus bisulcatus) 148 



13 



