Literature references
2 literature references for Opuntia engelmannii Salm-Dyck ex Engelm.:
| Author: | – |
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| Year: | 2013 |
| Title: | – |
| Source: | The International Plant Names Index, botanical information system from the Royal Botanic Gardens, Kew, the Harvard University Herbaria, and the Australian National Herbarium, available at http://www.ipni.org/index.html |
| Author: | – |
|---|---|
| Year: | 2013 |
| Title: | – |
| Source: | Tropicos, botanical information system at the Missouri Botanical Garden, available at http://www.tropicos.org/ |