Complete list of species
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| scientific name | common name(s) | image gallery |
| Agave univittata | Thorncrest Century Plant Maguey Mezortillo | |
| Agave utahensis | Utah Agave | |
| Agave utahensis var. eborispina | Ivory-spined Agave Utah Agave | |
| Agave utahensis var. kaibabensis | Kaibab Agave | |
| Agave utahensis var. nevadensis | Nevada Agave | |
| Agave utahensis var. utahensis | Utah Agave | |
| Agave ×ajoensis | Ajo Agave | |
| Agave ×arizonica | Arizona Agave Arizona Century Plant | |
| Ageratina altissima | White Snakeroot | |
| Ageratina altissima var. altissima | White Snakeroot | |
| Ageratina altissima var. angustata | White Snakeroot | |
| Ageratina altissima var. roanensis | Appalachian White Snakeroot Appalachian Tall Boneset | |
| Ageratina aromatica | Lesser Snakeroot Small-leaf Snakeroot Small-leaved Snakeroot Small White Snakeroot Aromatic Snakeroot Fragrant Snakeroot Aromatic Thoroughwort Fragrant Thoroughwort | |
| Ageratina aromatica var. aromatica | Lesser Snakeroot Small-leaf Snakeroot Small-leaved Snakeroot Small White Snakeroot Aromatic Snakeroot Fragrant Snakeroot Aromatic Thoroughwort Fragrant Thoroughwort | |
| Ageratina aromatica var. incisa | Lesser Snakeroot Small-leaved Snakeroot | |
| Ageratina havanensis | Shrubby Boneset White Mistflower White Shrub Mistflower Havana Snakeroot | |
| Ageratina herbacea | Fragrant Snakeroot | |
| Ageratina jucunda | Hammock Snakeroot | |
| Ageratina lemmonii | Lemmon's Snakeroot | |
| Ageratina luciae-brauniae | Lucy Braun's Snakeroot Rockhouse White Snakeroot | |
| Ageratina occidentalis | Western Snakeroot Western Thoroughwort | |
| Ageratina paupercula | Santa Rita Snakeroot | |
| Ageratina rothrockii | Rothrock's Snakeroot | |
| Ageratina shastensis | Shasta Snakeroot Mt. Shasta Snakeroot | |
| Ageratina wrightii | White Mistflower Wright's Snakeroot White Boneset White Ageratum | |
| scientific name | common name(s) | image gallery |
