Green Procumbent Speedwell: Veronica agrestis -
American Speedwell, American Brooklime: Veronica americana - Flowers appear to have 4 petals, with the lower one larger. Stamens often twisted. Fleshy stems and lightly toothed, opposite leaves. Flower stems arise from leaf axils. Plant of ditches, streams, or very moist ground.
Blue Speedwell, Blue Water Speedwell, Water Speedwell, Water Pimpernel: Veronica anagallis-aquatica (Synonyms: Veronica anagallis, Veronica connata, Veronica connata var. glaberrima) -
Common Speedwell, Corn Speedwell, Wall Speedwell: Veronica arvensis -
Heartleaf Snow Queen, Heart-leaf Snow Queen: Veronica california (Synonyms: Synthyris cordata, Synthyris reniformis var. cordata) -
Chain Speedwell: Veronica catenata (Synonym: Veronica catenata)
Germander Speedwell: Veronica chamaedrys -
Cusick's Speedwell: Veronica cusickii -
Cut-leaf Kittentails, Feather-leaf Kittentails: Veronica dissecta ssp. lanuginosa (Synonyms: Synthyris lanuginosa, Synthyris pinnatifida, Synthyris pinnatifida var. lanuginosa) -
Threadstalk Speedwell, Thread-stalk Speedwell: Veronica filiformis -
Ivy Speedwell, Ivy-leaf Speedwell: Veronica hederifolia (Synonym: Veronica hederaefolia) -
Long-leaf Speedwell, Long-leaved Speedwell: Veronica longifolia -
Common Speedwell, Heath Speedwell, Herbal Speedwell, Paul's Betony: Veronica officinalis (Synonyms: Veronica officinalis var. officinalis, Veronica officinalis var. tournefortii) -
Purslane Speedwell: Veronica peregrina var. peregrina (Synonym: Veronica peregrina var. typica) -
Hairy Purslane Speedwell: Veronica peregrina var. xalapensis (Synonyms: Veronica peregrina ssp. xalapensis, Veronica sherwoodii) -
Persian Speedwell, Bird-eye Speedwell: Veronica persica -
Round-leaved Kittentails, Snow Queen: Veronica regina-nivalis (Synonyms: Synthyris reniformis, Synthyris reniformis var. reniformis) -
Fringepetal Kittentails, Fringe-petal Kitten's-tail, Fringed Synthyris: Veronica schizantha (Synonym: Synthyris schizantha)
Marsh Speedwell, Skullcap Speedwell, Grass-leaf Speedwell: Veronica scutellata -
Thyme-leaved Speedwell: Veronica serpyllifolia var. humifusa (Synonym: Veronica humifusa) -
Thymeleaf Speedwell, Thyme-leaved Speedwell: Veronica serpyllifolia var. serpyllifolia (Synonyms: Veronica serpyllifolia var. nummularioides, Veronica serpyllifolia ssp. serpyllifolia, Veronicastrum serpyllifolium) -
Undulate Speedwell: Veronica undulata - Not naturalized.
Alpine Speedwell, American Alpine Speedwell, Hairy Speedwell: Veronica wormskjoldii (Synonyms: Veronica alpina, Veronica wormskjoldii ssp. alterniflora, Veronica wormskjoldii var. wormskjoldii) -