White (or cream-colored, or champagne ivory or bleached poodle blonde):

Western Solomon's-seal (Lily; Smilacina stellata): mid-May to mid-June

*White Camas and Death Camas (Lily; Zygadenus elegans and Z. venenosus): late May to mid-Aug

Fairy Bells (Lily; Disporum trachycarpum): Late May to mid-June

Wild White Geranium (Geranium; Geranium richardsonii): Late May to early July

Rock Jasmine (Primrose; Androsace chamaejasme): mid-May to early July

Fairy Candelabra/Pygmy Flower (Primrose; Androsace septentrionales): Late April to early June

Mountain Sandwort (Pink; Arenaria spp.): Mid-may through July

*Saxifrages (Saxifrage; Saxifraga spp.): May to August

*One-flowered Wintergreen/Single Delight (Heath): Mid-July to early August

Grass-of-parnessus (Saxifrage; Parnassia spp.): July and August

Western Canada Violet (Violet; Viola canadensis): Late May to mid-July

*Bunchberry/Dwarf Dogwood (Dogwood; Cornus canadensis): June and July

Wild Strawberry (Rose; Fragaria virginiana): May to July

*Kinnikinnik/Bearberry (Heath; Arctostaphylos uva-ursi): May to August

*Twinflower (Honeysuckle; Linnaea borealis): July

*White Pussytoes/Small-flowered Everlasting (Composite; Antennaria microphylla): June and July

Coltsfoot (Composite; Prenanthes frigidus): May

Wild Sweat Pea/Vetchling (Pea; Lathyrus ochcoleucus): May to July

*Milk Vetch (Pea; Astragalus spp.): May and June

*White Clover (Pea; Trifolium repens): Late June to early August

Round-leaved Sundew (Sundew; Drosera rotundifolia): Late June to early August

*Bog Orchids (Orchid; Habenaria spp.): June and July

*Yarrow/Milfoil (Composite; Achillea millefolium): June to September

*Cow Parsnip (Carrot; Heracleum lanatum): June to August

*Fleabane (Composite; Erigeron spp.): April to August

Western Willow Aster (Composite; Aster hesperius): July and August

Greenish

*Meadow-rue (Buttercup; Thalictrum spp.): June and July

Peppergrass (Mustard; Lepidium densiflorum): June to August

Wild Sarsaparilla (Ginseng; Aralia nudicaulis): June

Twisted Stalk (Lily; Streptopus amplexifolius): May and June

False Hellebore (Lily; Veratrum viride): July and August

Stinging Nettle (Nettle; Urtica dioica): July

Yellow or Orange

*Western Wood Lily (Lily; Lilium philadelphicum): Mid-June to mid-July

Yellow Lady's-Slipper/Moccasin Flower (Orchid; Cypripedium calceolus): Mid-June to early July

*Dandelion (Composite; Taraxacum officinale): April to October

Hawkweed (Composite; Hieracium spp.): July and August

Arnica (Composite; Arnica spp.): Mid-June to September

*Wild Gaillardia/Brown-eyed Susan (Composite; Gaillardia aristata): July to September

*Potentilla/Cinquefoil (Rose; Potentilla spp.): May to September

*Buttercup (Buttercup; Ranunculus spp.): May to September

Yellow Avens (Rose; Gerum aleppicum): June to August

*Yellow Columbine (Buttercup; Aquilegia flavenscens): June

Purslane (Purslane; Portulaca oleracea): July

*Yellow Dryas/Yellow Mountain Avens (Rose; Dryas dummondii): Mid-June to early July

Stonecrop/Sedum (Orpine; Sedum stenopetalum): June

Yellow Alumroot (Saxifrage; Heuchera cylindrica): July to mid-August

Draba/Whitlow Grass (Mustard; Draba spp.): May to August

Flexweed (Mustard; Descurania sophia): June and July

Ragwort/Groundsel (Composite; Senecia spp.): June to August

Mountain Goldenrod (Composite; Solidago spathulata): August

*Early Yellow Locoweed (Pea; Oxytropsis sericea): May and June

*Yellow Sweet Clover (Pea; Melilotus officinalis): Mid-July to September

*Yellow Paintbrush (Figwort; Castille ja lutescens): June and July

Western Lousiewort (Figwort; Pedicularis bracteosa): July and August

Butter-and-Eggs/Yellow Toadflax (Figwort; Linaria vulgaris and L. dalmatica): late June through July

Umbrella Plant/Sulphur Plant/Wild Buckwheat (Buckweat; Eriogonum spp.): June to August

Red or Pink

*Red Paintbrush (Figwort; Castilla ja spp.): June to September

*Pale Sweetvetch/Pale Hedysarum (Pea; Hedysarum alpinum): July

*Red Clover (Pea; Trifolium pratense): Mid-June to early August

*Mountain Cranberry/Cow-berry (Heath: Vaccinium vitis-idaea): June

Grouseberry (Heath; Vaccinium scoparium): June and July

*Pink Pussytoes/Rosy Everlasting (Composite; Antemnaria rosea): June to August

Old-Man's Wishers/Prairie Smoke (Rose; Gerum triflorum): June

Common Pink Wintergreen (Heath; Pyrola asarifolia): July

Calypso Orchid/Fairy's Slipper/Venus's-Slipper (Orchid; Calypso bulbosa): June

*Small Bog Cranberry (Heath; Vaccinium oxycoccus); June

Swamp Laurel/Mountain Laurel (Heath; Kalmia polifolia): June and July

*Fireweed (Evening Primrose; Epilobium spp.): Mid-July to September

Dwarf Raspberry (Rose; Rubus arcticus): July

Blue or Purple

Pasque Flower/Prairie Crocus (Buttercup; Anemone patens): Late March to mid-May

*Blue Clematis (Buttercup; Clematis columbiana): May and June

Blue Camas (Lily; Camassia guamash): Mid- to late June

Wild Vetch/American Vetch (Pea; Vicia americana): June and July

*Sweetvetch/Mackenzie's Hedysarum (Pea; Hedysarum boreale): June

Showy Locoweed (Pea; Oxytropis splendens): Late June to mid-July

Wild Lupine (Pea; Lupinus spp.): July

Penstemon/Beard-Tongue (Figwort; Penstemon spp.): May to August

Bicknell's Geranium/Crane's Bill (Geranium; Geranium bicknellii): June to August

Rock Cress (Mustard; Arabis spp.): June and July

Speedwell/Veronica (Figwort; Veronica spp.): July to September

*Harebell/Bluebell (Harebell; Campanula rotundifolia): July to October

Wild Blue Flax (Flax; Linum lewisei): June and July

*Mertensia/Bluebells/Lungwort (Borage; Mertensia paniculata): Late June to mid-July

Early Blue Violet/Dog Violet (Violet; Viola adunca): Mid-May to early June

Butterwort (Bladderwort; Pinguicula vulgaris): June and July

Brook Lobelia (Bluebell; Lobelia kalmii): Mid-August to early September

*Northern Blue Columbine (Buttercup; Aguilegia brevistyla): June and July

*Tall Larkspur/Delphinium (Buttercup; Delphinium glaucum): Mid-July to mid-August

*Monkshood/Aconite (Buttercup; Aconitum delphini folium): July

Wild Mint (Mint; Mentha arvensis): July and August

*Aster (Composite; Aster spp.): July to October

Showy Fleabane (Composite; Erigeron peregrinus): July

*Gentians (Gentian; Gentiana spp.): June to September

White

Alpine Anemone (Buttercup; Anemone parviflora): May to mid-August

Drummond's Anemone (Buttercup; Anemone drummondii): June

Alpine Gass-of-Parnassus (Saxifrage; Parnasia kotzebuei): July

White Dryas (Rose; Dryas integrifolia): July

Alpine Pyrola/Lesser Wintergreen (Heath; Pyrola minor): July

*Saxifrage (Saxifrage; Saxifraga spp.): June to August

Alpine Fleabane and Woolly Fleabane (Composite; Erigeron pallens and E. Lanatus): July and Aug

Meadow Spirea/Patridge-Foot (Rose; Luetkea pectinata): August

Bistort (Buckwheat; Polygonum viviparum): Late July to early August

Alpine Everlasting (Composite; Antennaria alpina): July

Alpine Coltsfoot (Composite; Petasites frigidus): July

White Heather (Heath; Cassiope tetrazona and C. mertensiana): Late June to early August

Yellowish Green, Reddish Green and Odd Colors

Green Heather/Yellow Heather (Heath; Phyllodoce glanduliflora): June and July

Longstem Greencaps/Alpine Wormwood (Composite; Artemisia norvegica): August

*Bladder Campion/Chinese Lantern (Pink; Lychnis apetala): June and July

Mountain Sorrel (Buckwheat; Oxyria digyma): July

Yellow or Orange

*Alpine Potentilla/Cinquefoil (Rose; Potentilla nivea): June to mid-July

*Alpine Buttercup/Snow Buttercup (Buttercup; Ranunculus escholtzii): June and July

*Alpine Dandelion (Composite; Taraxacum spp.): June to September

Alpine Hawksbeard (Composite; Crepis nana): August

Lyall's Goldenweed/Lyall's Iron-Plant (Composite; Haplopappus lyallii): July and August

Sibbaldia (Rose; Sibbaldia procumbens): June

Head-Shaped Louisewort (Figwort; Pedicularis capitata): July and August

Alpine Early Yellow Locoweed (Pea; Oxytropis sericea): July

*Alpine Yellow Paintbrush (Figwort; Castille ja occidentalis): July

Alpine Goldenrod (Composite; Solidago multiradiata): August

Red or Pink

*Moss Campion (Pink; Silene acaulis): Mid-June to early August

Alpine Louisewort (Figwort; Pedicularis arctica): July

Rose-Root (Sedum; Sedum roseum): June and July

Pink Heather (Heath; Phyllodoce empetriformis): July and August

Alpine Laurel (Heath; Kalmia microphylla): Late July to early August

Blue or Purple

*Alpine Forget-Me-Not (Borage; Myosotis alpestris): July

Alpine Speedwell/Alpine Veronica (Figwort; Veronica wormskjoldii): July

Alpine Rock Cress (Mustard; Arabis lyalli and A. lemmonii): June and July

*Alpine Harebell (Bluebell; Campanula lasiocarpa): July and August

*Purple Saxifrage (Saxifrage; Saxifraga oppositifolia): Mid-July

Alpine Purple Wallflower (Mustard; Erysimum pallasii): July

Lapland Rosebay (Heath; Rhododendron lapponicum): July and August

Telesonix (Saxifrage; Telesonix heucheriformis): July

*Alpine Columbine (Buttercup; Aquilegia jonesii): June

Bladder Locoweed (Pea; Oxytropis podocarpa): July

Blue Bottle/Smooth Alpine Gentian (Gentian; Gentiana glauca); Mid-July to mid-August

*Alpine Milk-Vetch (Pea; Astragalus alpinus): July

Moss Gentian (Gentian; Gentiana prostrata): July

*Scorpionweed/Silky Phacelia/Purple Bee Plant (Waterleaf; Phacelia sericea): Late May to mid-Aug

Saw Wort/Saussurea (Composite; Saussurea nuda): July and August

Crowberry (Heath; Empetrum nigrum): June