you are talking about under the long cacti, next to the Yucca, but I know that as a Salvia (Bottom of the picture, center). It may be the Graham Sage here http://www.tohonochulpark.org/greenhouse/Plants/S.html
you are talking about. The light over the door is HERITAGE LANTERN: W175RP and the one in the back corner at the chair is LUMIERE: 203-50MR16-12-CS / WJMK
designer is talking about some of her ideas and inspiration in the article, hope it will help:
http://www.houzz.com/ideabooks/788978/list/Open-House--Designers-Create-Uplifting-Sanctuaries
you are talking about the applied panels... Most people seem to use the #163 baseboard cap- there are a few that are quite similar. As far as the rest goes- choose something with simple, but well-defined profiles. It's all about how light plays on those faces. You can do OK at Home Depot, but try to