- Downingia elegans, Californian Lobelia;Clintonia elegans Douglas ex Lindl;Elegant calicoflower
- Lobelia amoena, Southern Lobelia
- Lobelia anceps, Lobelia;Angled Lobelia;Rapuntium anceps Lf CPresl;Lobelia alata Labill;Lobelia alata Labill var alata;Rapuntium alatum Labill CPresl;Lobelia cuneiformis Labill;Lobelia alata var cuneiformis Labill RBr;Rapuntium cuneiforme Labill CPresl;Lobelia alata var angustifolia RBr;Lobelia rhizophyta Spreng;Lobelia erecta de Vriese;Lobelia saxicola de Vriese;Lobelia stricta de Vriese;Lobelia uncinata de Vriese;Lobelia decumbens Sims;Lobelia alata var stolonifera Endl;Lobelia angustifolia Benth
- Lobelia angulata, Lawn Lobelia;Pratia angulata;Pratia arenaria
- Lobelia appendiculata, Pale lobelia
- Lobelia beaugleholei, Showy Lobelia;Pratia aff purpurascens RBr EWimm sensu Toelken, HR 1986
- Lobelia berlandieri, Berlandiers lobelia
- Lobelia boykinii, Boykins Lobelia
- Lobelia brevifolia, Shortleaf lobelia
- Lobelia canbyi, Canbys Lobelia
- Lobelia chinensis, Chinese lobelia
- Lobelia dortmanna, Water Lobelia;Dortmanns cardinalflower
- Lobelia dunnii, Dunns lobelia
- Lobelia elongata, Longleaf Lobelia
- Lobelia erinus, Bedding Lobelia;Garden Lobelia;Edging lobelia
- Lobelia feayana, Bay lobelia
- Lobelia fenestralis, Fringeleaf lobelia
- Lobelia flaccidifolia, Foldear Lobelia;Lobelia halei Small
- Lobelia floridana, Florida Lobelia
- Lobelia gaudichaudii, Koolau Range lobelia
- Lobelia gibbosa, Tall Lobelia;Rapuntium gibbosum Labill CPresl;Lobelia microsperma FMuell
- Lobelia glandulosa, Glade Lobelia
- Lobelia gloria-montis, Bog lobelia
- Lobelia grayana, Haleakala lobelia
- Lobelia heterophylla, Wing-seeded Lobelia;Rapuntium heterophyllum Labill CPresl
- Lobelia hillebrandii, Maui lobelia
| - Lobelia homophylla, Pineland lobelia
- Lobelia inflata, Indian-tobacco;Inflated lobelia
- Lobelia kalmii, Ontario lobelia
- Lobelia kauaensis, Lava lobelia
- Lobelia laxiflora, Sierra Madre lobelia
- Lobelia monostachya, Waianae Range lobelia
- Lobelia niihauensis, Niihau lobelia
- Lobelia nuttallii, Nuttalls Lobelia
- Lobelia oahuensis, Oahu lobelia
- Lobelia paludosa, White Lobelia
- Lobelia puberula, Downy Lobelia;Downy Blue Lobelia
- Lobelia remyi, Grayleaf lobelia
- Lobelia rhombifolia, Tufted Lobelia;Lobelia psilostoma EWimm
- Lobelia rhytidosperma, Wrinkle-seeded Lobelia;Isotoma rhytidosperma FMuell
- Lobelia rotundifolia, Roundleaf lobelia
- Lobelia siphilitica, Great Lobelia;Great blue lobelia
- Lobelia spicata, Palespike lobelia
- Lobelia tenuior, Slender Lobelia;Rapuntium tenuius RBr CPresl;Lobelia heterophylla var major Paxton;Lobelia adscendens de Vriese;Lobelia longepedunculata de Vriese;Lobelia longepedunculata de Vriese var longepedunculata;Lobelia longepedunculata var gracilior de Vriese;Lobelia ciliata de Vriese
- Lobelia trigonocaulis, Forest Lobelia;Lobelia leichhardii EWimm
- Lobelia urens, Heath Lobelia
- Lobelia villosa, Alakai swamp lobelia
- Trematolobelia grandifolia, Largeflower false lobelia
- Trematolobelia kauaiensis, Kauai false lobelia
- Trematolobelia singularis, Lavaslope false lobelia
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