All Species in Gratiola
- Boggs Lake Hedgehyssop (Gratiola heterosepala)
- Bractless Hedgehyssop (Gratiola ebracteata)
- Branched Hedgehyssop (Gratiola ramosa)
- Clammy Hedgehyssop (Gratiola neglecta)
- Florida Hedgehyssop (Gratiola floridana)
- Golden Hedgehyssop (Gratiola lutea)
- Granite Hedgehyssop (Gratiola graniticola)
- Gratiola bogotensis (Gratiola bogotensis)
- Gratiola concinna (Gratiola concinna)
- Gratiola fluviatilis (Gratiola fluviatilis)
- Gratiola griffithii (Gratiola griffithii)
- Gratiola japonica (Gratiola japonica)
- Gratiola linifolia (Gratiola linifolia)
- Gratiola mauretanica (Gratiola mauretanica)
- Gratiola nana (Gratiola nana)
- Gratiola oresbia (Gratiola oresbia)
- Gratiola pedunculata (Gratiola pedunculata)
- Gratiola peruviana (Gratiola peruviana)
- Gratiola pubescens (Gratiola pubescens)
- Gratiola pumilo (Gratiola pumilo)
- Gratiola sexdentata (Gratiola sexdentata)
- Hedgehyssop (Gratiola officinalis)
- Limestone Hedgehyssop (Gratiola quartermaniae)
- Little Amphianthus (Gratiola amphiantha)
- Rough Hedgehyssop (Gratiola hispida)
- Roundfruit Hedgehyssop (Gratiola virginiana)
- Shaggy Hedgehyssop (Gratiola pilosa)
- Short's Hedgehyssop (Gratiola viscidula)
- Sticky Hedgehyssop (Gratiola brevifolia)
- Yellow Hedgehyssop (Gratiola torreyi)