Picture of the month : May 2011
| Category | May 2011 |
| Name | Gymnocalycium walteri HT 1139 |
| Notes | Argentina, Prov. Córdoba, in the area of San Pedro del Norte, 770 m |
| Category | May 2011 |
| Name | Gymnocalycium walteri HT 1139 |
| Notes | Argentina, Prov. Córdoba, in the area of San Pedro del Norte, 770 m |