Aggie-Ama- I love the way your agave and its pot echo the same blue-green color. And what a pretty patio!

Trek- a picture of your "plant tower"?...
Portulaca is wonderful- it is indeed like a succulent. It asks for so little and blooms so enthusiastically under the most dismal blastingly hot conditions.
Everyone had it in their patios in Puerto Rico.

Here is a picture of a funny little cactus of mine called "Medieval Castle" (Cereus peruvianus monstrosa). It's one of the family of "monstrosa" cacti so called because they grow very irregular somewhat deformed growths-- like monstrosities.
This one has red fur-like spines all over it that get into your skin like nasty fiberglass if you are not careful. The red fur is quite pretty but in this photo the backlit sun sort of hides it.
Click image for larger version. 

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