Plants with yellow or green flowers
 Gnaphalium uliginosum (Low Cudweed) |
 Grindelia squarrosa (Gumweed) |
 Gutierrezia sarothrae (Broomweed) |
 Helenium autumnale (Sneezeweed) |
 Helianthus annuus (Common Annual Sunflower) |
 Helianthus maximiliani (Narrow-Leaved Sunflower) |
 Helianthus nuttallii (Common Tall Sunflower) |
 Helianthus pauciflorus ssp. subrhomboideus (Beautiful Sunflower)) |
 Helianthus petiolaris (Prairie Sunflower) |
 Heterotheca villosa var. villosa (Hairy Golden Aster) |
 Heuchera parvifolia (Small-leaved Alumroot) |
 Hieracium umbellatum (Canada Hawkweed) |
 Hudsonia tomentosa (Sand Heather) |
 Humulus lupulus (Common Hops) |
 Hymenopappus filifolius (Tufted Hymenopappus) |
 Hymenoxys richardsonii (Colorado Rubberweed) |
 Hyoscyamus niger (Black Henbane) |
 Hypoxis hirsuta (Eastern Yellow Stargrass) |
 Impatiens capensis (Spotted Touch-Me-Not) |
 Impatiens noli-tangere (Western Jewelweed) |
 Iva axillaris (Poverty-weed) |
 Krascheninnikovia lanata (Winter Fat) |
 Lactuca serriola (Lobed Prickly Lettuce) |
 Linaria vulgaris (Yellow Toadflax) |
 Linum rigidum (Yellow Flax) |
 Liparis loeselii (Bog Twayblade) |