I’m surprised at how well the acrylic paints hold up. This was painted back when acrylics were relatively new and no one really knew if they were going to hold up as promised. I remember every artist arguing about whether or not it was a real media or a fad. True purists said only oil was real art. I have come to think of acrylic as the other oil that dries faster. Then came alkides!
As for century plants, (these are in Arizona) they bloom approximately every hundred years (so they say), and accordingly named them such. I have seen them bloom in ten year cycles or as the rain comes in unpredictable cycles in the Arizona desert, no one really knows.