Volunteer seedlings in Tucson

[Melt In The Sun]

Hi gang,
I have a few different species volunteering in my yard...most I have identified but I'm not sure about this one. Any ideas? I thought maybe Peniocereus, but the spines look too large and yellow based on photos I was able to find. Maybe Pachycereus marginatus? Thanks in advance.

[tumamoc]

Cereus peruvianus.

[Melt In The Sun]

Thanks Tumamoc. There are some plants in my neighbors' yards that have produced some fruit.

[tumamoc]

Seedlings are rare relative to the number of these plants around Tucson and everywhere else. I'll bet 99.9% of the plants we see started from rooted cuttings.

[leisurely]

I have a very large tree size Cereus peruvianus monstrose in my landscape that produces an abundance of flowers and fruit every year. I occasionally find seedlings in other parts of the landscape which is the result of bird feeding on the fruit, I suppose.