Opuntia imbricata (Haw.) DC.
| A new snake of the genus Tantilla from west Texas S A Minton (1956) Fieldiana: Zoology 34(39): 449-452 | |
| Herpetology of the Zuni Mountains Region, Northwestern New Mexico Frederick R Gehlbach (1965) Proc. US. Natl. Mus 116: 243-332 | |
| Additional notes on the genus Verbena. XXIV H N Moldenke (1977) Phytologia 36: 117-158 | |
| Plants Whose Flowers Are Utilized by Adults of Pepsis Grossa Fabricius (Hymenoptera: Pompilidae) as a Source of Nectar Fred Punzo (2006) Journal of Hymenoptera Research 15: 171-176 |