Assuming this is Oncosiphon,some people asked for seeds and I would be glad to provide some but have no idea how to get seeds. I'm not a real gardener, just wanted to know the name of this plant that is all over the foothills north of Phoenix. So if someone could give me a few instructions re how to collect seeds I would be happy to send some off when they are ready. thanks Caroline (OP) Cave Creek AZ

It's tansy or golden buttons, Tanacetum vulgare.

Cactus flowers... possibly dragon fruit.

If you like bamboo and have a bamboo specialist nursery within reasonable driving distance go talk to them about your situation, possible options. In my area much of the business of such operations has been said to be generated by people wanting quick narrow screening - but unwilling to pay for an actual built fence. Otherwise two highly prevalent hedging choices in my part of USDA 8 at this time are 'Smaragd' (Emerald) arborvitae and Leyland cypress. However the Thuja is slow and the cypress quite tall and broad (on most sites here, although some sections have climate conditions that result in naturally close, narrow growth) - unless developed and maintained as a formal hedge. That is one with annual shearing of its entire surface, from top to bottom.