Literature references
3 literature references for Opuntia echinocarpa var. echinocarpa Engelm. & J.M. Bigelow:
| Author: | – |
|---|---|
| Year: | 1996 |
| Title: | – |
| Source: | database, NODC Taxonomic Code |
| Author: | – |
|---|---|
| Year: | 1996 |
| Title: | – |
| Source: | database, The PLANTS Database |
| Author: | Flora of North America Editorial Committee, eds. |
|---|---|
| Year: | 2003 |
| Title: | – |
| Source: | Flora of North America North of Mexico, vol. 4: Magnoliophyta: Caryophyllidae, part. 1, The volumes are also reproduced online (http://www.fna.org/) |