There are multiple 6-legged creatures that feed on cacti. Narnia femorata is one type of cactus bug.
Adenium obesum is a great plant because it is tolerant of neglect. It likes a warm sunny place and not too much water. Winter is a good time to let it go dormant, just withhold water and it will drop its leaves. It likes to be above 45F all year when dormant and it is not tolerant of frost. Don’t keep it too warm when dormant if it is a potted plant, but let it have lots of sun in the growing season–half day is good–more won’t hurt as long as it is acclimated.
Like many plants in the milkweed family, Adenium sap is poisonous. So, don’t let pets or children chew on the stems.
The plants can made a beautiful caudex, and they have beautiful flowers. A. obesum makes a great plant for indoors (sunny window) or outdoors in the summer or in a mild climate.
‘ECHINOCEREUS’ Special Issue Supplement to vol. II N. 3 July 1998 of Quaterly Journal of the Cactus & Co. International Society. EDITED BY LINO DI MARTINO
Click photo to read PDF file.
A recent scientific paper (Molecular Phylogenetics and Evolution 65  668–681) took on the formidable task of sorting out relationships in opuntiads from South America that have cylindrical or spherical stems. These plants are all in the tribe Tephrocacteae.
The paper makes for complicated reading, but their results imply several things about the Tephrocacteae.
- They found that Austrocylindropuntia, Punotia, Cumulopuntia, Tephrocactus, Pterocactus and Maihueniopsis represent a single large group (a single lineage) with four major subgroups.
- They found that Maihueniopsis clavarioides, Tephrocactus bonniae and Cumulopuntia subterranea are not closely related and thus don’t belong together in the single genus, Puna.
- They found two different groups of Cumulopuntia that don’t appear too be closely related and perhaps represent two different genera.
- They found that at least one species of Tunilla is closely related to Maihueniopsis species.
One of the best parts of the paper was the color map showing where the various genera are found in South America. It is interesting how the genera stretch along the Andes.