Hi Jeffrey, 

Thanks for your questions. A few suggestions would be  Blue Arrow Juniper,  Curl-leaf mountain mahogany (native plant and great for pollinators)  or Vanderwolf's pyramid pine. While these are low water use, they will need some supplemental irrigation during the growing season.  Here is a link to the Water-wise Gardening in Central Oregon which features water-wise trees, shrubs, perennials and their water needs. 

 https://extension.oregonstate.edu/catalog/pub/em-9136-water-wise-gardening-central-oregon

Here is a list of native plants:

https://extension.oregonstate.edu/catalog/pub/ec-1623-selecting-native-plants-home-landscapes-central-oregon

Feel free to stop by the OSU Demo garden (address below) which features the above mentioned plants as well as many others!

Lisa

Lisa Cowan

Outreach Program Coordinator – Community Horticulture Program

Oregon State University

OSU Extension Service – Deschutes, Crook, Jefferson Counties

3800 SW Airport Way, Bldg #4

Redmond, OR 97756

Tel.:<personal data hidden> (direct line) I<personal data hidden> (x79590 - main line)

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