oh the Echinocereus I have came with the name Echinocereus rubispinius, which I think is an old name for E. rigidissimus ssp rubispinius.
As for the Opuntia I think it's O. gooseliana and it's normal when it's under stress. this winter wasn't too bad, our low was 31. 4. We had light frosts three times.
sorry to hear about losing saguaros they are wonderful cacti. They grow well, (even tho it's slowly, they put on 6-12 inches every year just takes them a long time to get to being really tall!). I think all of mine are going to bloom this year that are tall enough. they have been slow to put out buds in my yard because I sit so low.. the cold air comes in from the river valley...
On the O. aciculata give it a year or two. Mine last year had about 5-10 flowers, this year mine put on around 30. It really likes it here. I know it is native to TX but it's a beautiful plant, with great flowers and neat spines. Course I nicknamed mine Vlad the Impaler because of all the insects it caught in it's spines. It was crazy how many there were. This year not as many, so maybe they learned
Whatever the flowers look like on my Echinocereus they are going to be brilliant I am sure
Any day now. probably bloomed today while I was working on the install
Here's to you, all you insidious creatures of green..er I mean cacti.