- Calibrachoa parviflora, Petunia parviflora Juss;Seaside petunia
- Petunia axillaris, A Petunia;Nicotiana obtusisepala Domin;Nicotiana axillaris Lam;Large white petunia
- Petunia integrifolia, Violetflower petunia
- Ruellia brevifolia, Tropical wild petunia
- Ruellia caerulea, Brittons Wild Petunia;Ruellia brittoniana Leonard;Ruellia malacosperma sensu Small, non Greenm;Ruellia tweediana auct non Griseb
- Ruellia caroliniensis, Carolina wild petunia
- Ruellia ciliatiflora, Hairyflower wild petunia
- Ruellia corzoi, Corzos wild petunia
- Ruellia davisiorum, Rio Grande wild petunia
- Ruellia devosiana, Brazilian wild petunia
- Ruellia drummondiana, Drummonds wild petunia
- Ruellia drushelii, Drushels wild petunia
- Ruellia humilis, Fringeleaf wild petunia
| - Ruellia malacosperma, Softseed wild petunia
- Ruellia metziae, Metzs wild petunia
- Ruellia noctiflora, Nightflowering Wild Petunia
- Ruellia nudiflora, Violet wild petunia
- Ruellia occidentalis, Western wild petunia
- Ruellia parryi, Parrys wild petunia
- Ruellia pedunculata, Stalked Wild Petunia
- Ruellia prostrata, Prostrate wild petunia
- Ruellia purshiana, Purshs Wild Petunia
- Ruellia strepens, Limestone wild petunia
- Ruellia yucatana, Yucatan wild petunia
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