Agave Family, Banana Yucca, Yucca baccata

Agave Family, Narrowleaf or Plains Yucca, Yucca intermedia

Amaranth Family, Four-Winged Saltbush, Atriplex canescens

Amaranth Family, Winterfat, Krascheninnkovia (or Ceratoides) lanata

Asparagus Family, Feathery False Solomon's-Seal, Maianthemum racemosum

Asparagus Family, Starry False Solomon's-Seal, Maianthemum stellatum

Asparagus Family, Beargrass, Nolina

Aster Family, Western Yarrow, Achillea millefolium

Aster Family, Fragrant Snakeroot, Ageratina herbacea

Aster Family, Mule Fat or Seepwillow, Baccharis salicifolia

Aster Family, Emory's Baccharis, Baccharis salicina

Aster Family, Baby Aster, Chaetopappa ericoides

Aster Family, Buena Mujer or Mexican Devilweed,  Chloracantha spinosa

Aster Family, Horseweed, Conyza

Aster Family, Fleabane or Showy Daisy, Erigeron (can also look light purple)

Aster Family, Coulter's Horseweed, Laennecia coulteri

Aster Family, Ox-Eye Daisy, Leucanthemum vulgare

Aster Family, Blackfoot Daisy, Melampodium leucanthum

Aster Family, Cotton Batting Plant, Pseudognaphalium stramineum (white outside, yellow disk)

Aster Family, White Prairie Aster, Symphyotrichum falcatum

Aster Family, Annual Townsend Daisy, Townsendia annua

Aster Family, Easter Daisy, Townsendia exscapa

Bignonias Family, Northern Catalpa, Catalpa speciosa

Borage Family, Hidden Flower or Thicksepal Catseye, Cryptantha crassisepala

Borage Family, Stickseed, Hackelia (can be blue)

Borage Family, Phlox or Bindweed Heliotrope,  Heliotropium convolvulaceum

Borage Family, Salt Heliotrope,  Heliotropium curassavicum

Borage Family, Franciscan Bluebells, Mertensia franciscana

Borage Family, Variable-Leaf Scorpion-Weed, Phacelia heterophylla

Buckthorn Family, Fendler's Buckbrush, Ceanothus fendleri

Buckwheat Family, Nodding Buckwheat, Eriogonum cernuum

Buckwheat Family, James' Buckwheat, Eriogonum jamesii

Buckwheat Family, Slender Buckwheat, Eriogonum microtheca or microthecum

Buckwheat Family, Redroot Buckwheat, Eriogonum racemosum

Buckwheat Family, Wright's Buckwheat, Eriogonum wrightii

Buckwheat Family, Silver Lace Vine (Fallopia baldschuanica)

Buckwheat Family, Pale Smartweed, Persicaria lapathifolia (can also be pink)

Buckwheat Family, Prostrate Knotweed, Polygonum aviculare

Bunchflower Family, Mountain Death Camas (Anticlea elegans)

Buttercup Family, Baneberry, Actaea rubra

Buttercup Family, White Virgin's-Bower, Clematis ligusticifolia

Cleomaceae, Red-Whisker Clammyweed, Polanisia dodecandra

Dogbane Family, Dogbane, Apocynum

Dogbane Family, Spider Milkweed or Antelope Horns, Asclepias asperula

Dogbane Family, Broadleaf Milkweed, Asclepias latifolia

Dogbane Family, Showy Milkweed, Asclepias speciosa

Dogbane Family, Horsetail Milkweed or Yerba lechosa, Asclepias subverticillata

Evening Primrose Family, Scarlet Gaura, Oenothera suffrutescens (can also be pink)

Evening Primrose Family, white to very pale evening primrose, Oenothera spp.

Four O'Clock Family, Sand Verbena, Abronia

Gooseberry Family, Trumpet Gooseberry, Ribes leptanthum (can show some pink)

Gooseberry Family, Wolf's Currant, Ribes wolfii

Heath Family, Sidebells (Orthilia secunda)

Honeysuckle Family, Japanese Honeysuckle, Lonicera japonica (can also be yellow)

Honeysuckle Family, Snowberry, Symphoricarpos rotundifolius (also pink)

Honeysuckle Family, Tobacco Root, Valerianus edulis (flower heads look light green)

Hydrangea Family, Cliff Fendlerbush, Fendlera rupicola

Hydrangea Family, Little-Leaf Mock Orange, Philadelphus microphyllus

Lily Family, Gunnison's Mariposa Lily, Calochortus gunnisonii 

Lily Family, Sego Lily, Calochortus nuttallii

Lizard's Tail Family, Yerba Mansa, Anemopsis californica

Loasa Family, Blazing Star or Desert Stickleaf, Mentzelia multiflora

Madder Family, Northern Bedstraw, Galium boreale

Madder Family, Fragrant Bedstraw, Galium triflorum

Mallow Family, Flower-of-an-Hour (Hibiscus trionum)

Mallow Family, Common Mallow, Cheeseweed, Malva neglecta

Mallow Family, Alkali Mallow, Malvella leprosa

Mallow Family, White Checkermallow, Sidalcea candida

Milkwort Family, White Milkwort, Polygala alba

Mint Family, Horehound, Marrubium vulgare

Mint Family, Cutleaf or Lacy Germander, Teucrium laciniatum

Morning Glory Family, Field Bindweed, Convolvulus arvensis (often includes splashes of pink to lavender)

Morning Glory Family, Dodder, Cuscuta

Moschatel Family, Red Elderberry, Sambucus racemosa

Mustard Family, Shepherd's Purse, Capsella bursa-pastoris

Mustard Family, Spectacle Pod, Dimorphocarpa wislizeni

Mustard Family, Sweet Alyssum, Lobularia maritima

Mustard Family, Pepperweed, Lepidium

Mustard Family, Watercress, Nasturtium officinale (leaves shown)

Orchid Family, Summer or Spotted Coralroot Orchid,  Corallorhiza maculata 

Orchid Family, Rattlesnake Orchid, Goodyera oblongifolia

Parsley Family, Oshá, Porter's Lovage, Ligusticum porteri

Parsley Family, Sweet Cicely, Osmorhiza

Pea Family, Milkvetch, Astralagus spp. 

Pea Family, White Prairie Clover, Dalea candida

Pea Family, Foxtail Prairie Clover, Dalea leporina

Pea Family, Prairie Bundleflower, Desmanthus illinoensis

Pea Family, American licorice or wild licorice, Glycyrrhiza lepidota

Pea Family, Bush Vetchling, Lathyrus eucosmus (can also be pink)

Pea Family, Everlasting Pea or Perennial Peavine, Lathyrus latifolius

Pea Family, White Sweetclover, Melilotus albus

Phlox Family, Miniature Woollystar, Eriastrum diffusum

Phlox Family, Eyed Gilia, Gilia ophthalmoides

Pink Family, Fendler's Sandwort, Eremogone fendleri

Pink Family, Sticky Starwort, Tuber Starwort, Pseudostellaria jamesiana

Pink Family, Chickweed, Stellaria

Plantain Family, Sand or Bush Penstemon, Penstemon ambiguus (can also be lavender)

Plantain Family, Wandbloom Penstemon, Penstemon virgatus (can also be purple)

Plantain Family, English Plantain, Plantago lanceolata

Potato Family, Chinese Thorn-Apple, Datura quercifolia

Potato Family, Sacred Datura or Thornapple, Datura wrightii

Potato Family, Silverleaf Nightshade, Solanum elaeagnifolium (usually purple not white)

Potato Family, Black Nightshade, Solanum sp.

Primrose Family, Rock Jasmine, Androsace

Rose Family, Saskatoon Serviceberry, Amelanchier alnifolia

Rose Family, Mountain Mahogany, Cercocarpus montanus

Rose Family, Hawthorn, Crataegus

Rose Family, Apache Plume, Fallugia paradoxa

Rose Family, Wild Strawberry, Fragraria vesca

Rose Family, Mountain Spray, Holodiscus dumosus

Rose Family, Crab Apple, Malus pumila

Rose Family, Mountain Ninebark, Physocarpus monogynus

Rose Family, American Plum, Prunus americana

Rose Family, Chokecherry, Prunus virginiana

Rose Family, Cliffrose, Purshia stansburyana

Rose Family, Red Raspberry, Rubus idaeus

Sandalwood Family, Bastard Toadflax, Comandra umbellata

Saxifrage Family, Little-Leaf Alumroot, Heuchera parviflora

Soapberry Family, Tropical Soapberry or Amolillo, Sapindus saponaria

Spurge Family, Texas Croton, Croton texensis

Spurge Family, Square-Seed Spurge, Euphorbia exstipulata

Spurge Family, Saw-Tooth Sandmat, Euphorbia serrula

Sumac Family, Smooth Sumac, Rhus glabra (red fruit shown; flowers can be white or green)

Sumac Family, Poison Ivy, Toxicodendron radicans (leaves shown)

Violet Family, Canada Violet, Viola canadensis

Watermilfoil Family, Parrot Feather, Myriophyllum aquaticum

Water-Plantain Family, Arum-Leaf Arrowhead, Sagittaria cuneata