| Tillandsia ignesiae Mez, 1903 |
| Tillandsia inopinata Espejo, López-Ferr. & W. Till, 2008 |
| Tillandsia insignis Matuda, 1971 |
| Tillandsia intumescens L.B. Sm., 1955 |
| Tillandsia intumescens var. brevilamina L.B. Sm., 1974 |
| Tillandsia jaliscomonticola Matuda, 1975 |
| Tillandsia lambrostachya Philcox & Psomad., 1982 |
| Tillandsia lecomtei Poiss. & Menet, 1908 |
| Tillandsia lepidosepala L.B. Sm., 1935 |
| Tillandsia lingulata L., 1753 |
| Tillandsia longiflora Sessé & Moc., 1894 |
| Tillandsia loxichaensis Ehlers, 2002 |
| Tillandsia lucida E. Morren ex Baker, 1889 |
| Tillandsia macropetala Wawra, 1887 |
| Tillandsia magnispica Espejo & López-Ferr., 2009 |
| Tillandsia malzinei (E. Morren) Baker, 1879 |
| Tillandsia manzanilloensis Gouda, 2016 |
| Tillandsia marabascoensis Ehlers & Lautner, 1992 |
| Tillandsia maritima Matuda, 1971 |
| Tillandsia mateoensis Ehlers, 1993 |