Interesting things, flowering cacti — they give a photographer such a list of contrasts to work with. Bright vs. muted colors.
Spiky vs. soft shapes.
Angular vs. rounded shapes.
These are all shots of a “Nipple cactus” (Coryphantha sulcata, a.k.a. Pineapple cactus), seen at the Lady Bird Johnson Wildflower Center in Austin, Texas. At least, that’s how it was labeled — but all the online information on this species shows it to be both smaller and bearing yellow flowers. Not sure what’s going on there…
One of the particularly nice things about Austin’s River Walk is that if you catch a boat taxi, you can just sit as it carries you past all sorts of beautiful and photogenic scenery — take this view, for example:
Of course, you’d better have your wits about you. Things come up fast, and you can miss a number of interesting sights in the time it takes to swap lenses.