Perennials & Annuals

Common Name Species Local, Regional,  Western, Midwestern  Native, or Introduced Size Flower color Flower time Evergreen Xeric Comment
Apache Sunset Agastache Agastache rupestris 'Apache Sunset' W 2 - 2 1/2 ft. Orange with purple calyx Summer no moderately Fine-leaved, blue green foliage with a wonderful anise or root beer scent.  It flowers from mid to late July until frost.  Hummingbirds love it.
Nettle-leaf Agastache Agastache urticifolia L,W 4-6 ft. Pale purple Summer no yes Tall, strongly scented plant in the mint family.  Butterflies love it.
Sitka columbine, Western columbine Aquilegia formosa L, W 1-2 ft. Red and yellow Late spring, early summer no moderately Elegant red and yellow columbine prefers somewhat moist sites.  Sun to part shade.
Narrowleaf milkweed Asclepias fascicularis L, R 8 - 12 inches pink late spring no moderately Dainty pink flowers in a small ball.  Narrow leaves circle the stems.  Grows at the base of shady slopes in pine woods, along river margins,and in dry intermittent stream beds.  This one's new to me - haven't grown it in the garden yet, but plan to plant it out this year.  
Showy Milkweed Asclepias speciosa L, R, W, M 2 ft. pink Summer no somewhat This showy and fragrant wildflower is important to many different pollinators, including Monarch butterflies.  Prefers a moist microsite.  
Orange butterfly flower Asclepias tuberosa M 12 - 15 in. orange Mid-summer no moderately Grows about a foot tall, with clusters of showy orange flowers.  Perennial and mid-summer blooming.  Outstanding honeybee plant as well as good for butterflies.  Surprisingly drought tolerant.  Another Monarch plant,
Woolypod milkvetch Astragalus purshii L,W <4 inches purple, white or combination Spring yes yes Ground hugging, wooly member of the pea family with large, showy flowers followed by cute wooly, egg shaped pods.
Arrowleaf balsamroot Balsamorhiza sagittatus L, W, M 12 - 18 inches yellow spring no yes These cheery yellow daisies decorate regional slopes and woodlands in the spring.   The whole plant is edible and was used by all local tribes.  Seeds are important food for birds and other small wildlife. Very long lived plant goes dormant in summer.
Dwarf sundrops Calylophus serrulatus M 4-6 inches yellow All summer no yes A small, mounding plant with a profusion of 1 inch yellow flowers.  Blooms all summer in the dry garden.  Self sows and naturalizes.
Nuttall's larkspur Delphinium nuttalianum L, R, W about 1 ft. deep purple to blue Early summer no yes This extremely variable delphinium is native throughout the west and into Canada.  The flowering spikes are loosely flowered with white to grayish-blue to deep blue-purple, spurred flowers.  Self sows profusely. Warning:  All Delphinium species, both wild and cultivated, are toxic if consumed
Yellow foxglove Digitalis lutea Introduced 24 inches pale yellow to cream Summer no no Shade tolerant, hummingbird attracting perennial with gracefully curving spikes of small creamy yellow flowers.
Cheyenne Spring' Coneflower Echinacea sp. 'Cheyenne Spring'  M 18-30 inches pink, brick red, orange, gold Summer no moderately Very attractive to butterflies, blooming for many weeks in late summer. Easily grown - blooms first year.    Multicolored selections of midwestern native coneflower. My new favorite.  space the plants about 10 to 14 inches apart in the sunny garden, 
Cutleaf Daisy Erigeron compositus L 6 inches White, occasionally pink or blue spring, summer no very Small rock garden plant.  Very long blooming and cheery.  
Desert Yellow Daisy Erigeron linearis L 6 inches Yellow spring somewhat very Cheery, tufted rock garden or xeriscape species from harsh rocky sites.
Showy Daisy Erigeron speciosus W 15 - 18 inches Pale to dark lilac & yellow Early summer no moderately Long blooming.  
Oregon Sunshine Eriophyllum lanatum L 4 - 6 inches Yellow spring somewhat very Small, cheery rock garden or xeriscape plant.  Two forms - larger from Palouse Prairie.  Reseeds enthusiasticly.
Prairie Smoke Geum triflorum L 4 - 6 inches pink Early summer yes yes Wonderful groundcover for sun or shade.  Goes dormant if very dry, but will remain green with occasional watering.
Scarlet Gilia Gilia aggregata L 2 - 2 1/2 ft. Red, scarlet or pink Summer Biennial.  First year rosette evergreen.  Dies second fall. yes Attracts hummingbirds.  Long blooming: sun to part shade.  
Roundleaf Alumroot, (Wild Coralbells) Heuchera cylindrica L 4 - 6 inches: up to 12 - 15 inches in bloom. white spring yes yes Great in rocky sites.  Bright green even in very dry sites.  Great for shade or sun.
Elise' Lewisia Lewisia cotyledon:  'Elise' Cultivar 6+ inches, in bloom Pastel pink, rose, salmon, orange, white and yellow, and bicolour patterns. variable yes somewhat Fleuroselect Gold Medal winner.  Succulent green leaves and great numbers of beautiful flowers. Lewisia ‘Elise’ thrives in a well-drained soil and is heat and
drought tolerant. 
Magenta' & 'Red-Purple' Lewisia Lewisia cotyledon:  'Magenta', 'Red-Purple' Cultivar about 6 inches,  in bloom reds & magentas, some bicolors variable yes somewhat Selections of Oregon's Lewisia cotyledon.   Will overwinter outdoors in pots, or can be brought in and enjoyed indoors when they are blooming. 
Hardy at least to zone 5.  Successful in the ground, with careful placement.  Easily overwhelmed by larger, faster growing plants.  Needs occasional watering
Little Peach'  Lewisia Lewisia longifolia:  'Little Peach'  R about 6 inches,  in bloom Little Peach' - pink, peach and yellow     variable yes somewhat Very showy in bloom.  Low-growing compact plants produce rosettes of 1" bloomsfor several weeks in late spring to midsummer and then again in fall. 
Tweedy's Lewisia Cistanthe tweedei, Lewisia tweedei Regional endemic about 6 inches,  in bloom Apricot, pink or white Early summer yes yes An amazingly beautiful plant with shiny spoon shaped leaves and large flowers.  A rare regional endemic, native only to the Wenatchee mountains.
Dry Ground Lupine, Desert Lupine Lupinus lepidus(?) L 2 ft. lilac or blue with white or pale yellow Early summer no very A very cute little frosty green lupine with a short, dense cluster of bicolored flowers.                                                                
Bigleaf Lupine Lupinus polyphyllus L, R, W 3 or more feet blue/purple: often bicolored Summer no no Tall and stately, with long racemes of pea flowers.  One of the original parents of Russel hybrid lupines.  Full sun to part shade.  Moist to wet soil.
Eastern Beebalm Monarda bradburiana M 1-2 ft. Pink to white with purple no somewhat Flowers are attractive to bees and butterflies. The toothed, aromatic, oblong, grayish-green leaves (to 4") may be used in teas. Long summer bloom period.   Best grown in dry to medium moisture, well-drained soils in full sun to part shade. Tolerates somewhat poor soils and some drought. 
Mountain Monardella, Coyote Mint Monardella odoratissima L 6 - 12 inches  purple Summer no yes Very fragrant (minty), mounded plant.  Best with occasional water.  Native American tea plant.
Garden Catmint Nepeta faasinii  Introduced 2 ft. in bloom Blue Summer no somewhat A hardy plant that flowers all season, needs a minimum of maintenance, is resistant to drought and sails happily through the coldest and driest of winters. It is a reliable plant, and a magnet for bees. 
Tufted Evening-Primrose Oenothera caespitosa R 10 inches White  Early summer semi-evergreen extremely A standout in the dry landscape.  Long blooming & gorgeous.  Large flowered.
Wasatch Penstemon Penstemon cyananthus W 2 - 3 ft.  purple Early summer yes yes Native to ID, WY, UT.  Beautiful & very showy.    Likes occasional watering.
Hot Rock Penstemon Penstemon deustus L, R 15-18 inches white Early summer no very Dark green, thick, leathery, serrated leaves, most handsome in the garden.  The flowers are small and whitish, but numerous enough to be very attractive.  Penstemon deustus is an important medicinal plant, highly regarded by the Shoshone and other Native American peoples.
Firecracker Penstemon Penstemon eatonii W 2 ft. red Early summer yes very Short lived but outstanding hummingbird attracting perennial.  Worth replanting annually or every other year.
Stickystem Penstemon Penstemon glandulosus L 3 - 3 1/2 ft. lilac spring no yes SW Washington meadow plant.  Large flowered.  Glands on all parts of plants glisten in the sun.  Very showy.  Native only to OR & WA: uncommon in cultivation.
Cutleaf Penstemon Penstemon richardsonii L, R 12 - 18 inches Hot pink Mid to late summer no very Energizer Bunny' of Penstemons.  Very long blooming.  Cut back in spring to keep tidy.  A perfect plant for a rock wall.  It will reseed & spread to fill crevices.  Good in a border.  Can take cold and dry conditions in sun or part shade.
Bridges' Penstemon Penstemon rostriflorus W 16 inches scarlet/red Late summer no yes Last red penstemon of the season, on a semi-shrubby plant with a woody base.  Great for hummingbirds. Reliable bloom in very xeric conditions: more blooms with watering.  Long-lived, if not overwatered.
Cascade Penstemon, Coast Penstemon Penstemon serrulatus R 24 - 28 inches. Blue-purple late spring - early summer yes moderately  A vigorous, free-blooming and well-liked plant for a partly shaded, watered flowerbed.  Will rebloom if cut back after flowering.  Plants have glossy, deep green leaves that turn purple or maroon in winter.  Good year-round interest: showy flowers & foliage. 
Blue Mt. Penstemon, Beautiful Penstemon Penstemon venustus R P purple Early summer semi-evergreen yes Very showy flower spikes.  Extremely floriferous, beloved by many different pollinators.  Short supply this year.  More in 2013.
Tufted Phlox Phlox caespitosa L P white to pink spring semi-evergreen yes Low growing tufted plant, somewhat larger than P. hoodii.  Open Ponderosa pine forest.  Rock garden plant.
Alpine Jacob's Ladder Polemonium pulcherrimum R 5 - 10 inches blue spring - early summer semi-evergreen yes Very long-blooming and charming, small rock garden plant.  Likes part day shade and occasional water.
Cherry Brandy' Gloriosa Daisy Rudbeckia hirta 'Cherry Brandy'  M 2 ft. red/ black center Summer no somewhat This beautiful black-eyed Susan has dozens of giant red and maroon daisies with black eyes.  They attract butterflies and bees all summer. In autumn, hungry songbirds replace the butterflies and bees, feasting on the seeds. 
Azure Sage, Pitcher Sage Salvia azurea M 3-5 ft. sky blue Late summer no yes A tall, linear accent plant most of the season.  Flowers with the asters, with the most amazing sky blue flowers.  Height depends on watering.  Shorter where mostly dry; can get quite tall with watering.
Sedum Sedum sp. (most) Introduced Varies by species, variety. Depends on species; yellow, pink, white spring, summer depends on species yes Many species and forms.  Most quite drought adapted.  Many make great ground covers or green roof material.
Missouri Goldenrod Solidago missouriensis L, R, W 1 1/2 ft. yellow Late summer no the most xeric goldenrod Local native of sagebrush steppe and Palouse prairie.  Spreads by rhizomes.
Orange Globemallow Sphaeralcea muroana L 1 1/2 ft. Orange Early summer no yes Very tough & beautiful plant.  Reblooms if deadheaded.  Cut back in spring for best form.
Adam's needle Yucca filamentosa From SE US Base to 2 ft.; flower stem 4 - 6 ft and more. white Summer yes yes Great upright, evergreen accent for the dry landscape.  Gorgeous with Artemisias or purple sage in the winter, and with smooth blue asters in the fall.
Creeping Hummingbird Trumpet Zauschneria garrettii W 4 - 6" bright orange/ scarlet Summer no moderately Spreads like a groundcover to 18" wide.  Reportedly not browsed by deer.  Water regularly when in bloom to keep flowers coming.  Prefers some afternoon shade.