18 Silene acaulis L. _Moss Campion_ 82 18 Lychnis apetala L. _Nodding Lychnis_ 82 19 Alsine borealis (Bigel.) Britton. _Northern Stitchwort_ 86 19 Mœhringia lateriflora (L.) _Blunt-Leaved Sandwort_ 86 19 Arenaria capillaris nardifolia (Ledeb.) Regel. _Rock Sandwort_ 86 20 Caltha leptosepala Hook. _Caltha leptosepala_ 104 20 Trollius albiflorus (A. Gray) Rydb. _Western Globe-Flower_ 104 21 Aquilegia brevistyla Hook. _Small Blue Columbine_ 102 22 Aquilegia flavescens S. Wats. _Yellow Columbine_ 106 22 Aquilegia formosa Fisch. _Western Columbine_ 106 23 Delphinium Brownii Rydb. _Mountain Larkspur_ 108 23 Anemone globosa Nutt. _Wind-Flower_ 108 24 Anemone Drummondii S. Wats. _Alpine Anemone_ 92 24 Anemone parviflora Michx. _Northern Anemone_ 92 25 Pulsatilla hirsutissima (Pursh) Britton _Pasque-Flower_ 94 25 Pulsatilla occidentalis (S. Wats.) Freyn. _Western Anemone_ 94 26 Atragene columbiana Nutt. _Purple Virgin’s-Bower_ 90 27 Ranunculus saxicola Rydb. _Ranunculus saxicola_ 100 27 Ranunculus alpeophilus. A Nels. _Ranunculus alpeophilus_ 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 inamœnus Greene _Ranunculus inamœnus_ 98 29 Thalictrum megacarpum Torr. _Thalictrum megacarpum_ 96 29 Thalictrum occidentale A. Gray. _Western Meadow Rue_ 96 30 Delphinium Menziesii DC. _Blue Larkspur_ 110 30 Lithophragma parviflora (Hook.) Nutt. _Lithophragma_ 110 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 33 Draba glacialis Adams _Whitlow-Grass_ 114 33 Draba aurea Vahl. _Golden Whitlow-Grass_ 114 34 Parnassia montanensis Rydb. & Fern. _Marsh Grass-of-Parnassus_ 126 34 Ribes lacustre (Pers.) Poir. _Swamp Gooseberry_ 126 35 Mitella nuda L. _Naked Bishop’s-Cap_ 132 35 Pectiantia pentandra (Hook.) Rydb. _Mitrewort_ 132 36 Saxifraga cernua L. _Nodding Saxifrage_ 136 36 Saxifraga rivularis L. _Alpine Brook Saxifrage_ 136