Whipple’s Penstemon is a striking perennial with whorls of deep purple burgundy, almost black flowers with pin-striped, cream-colored throats in mid late summer. Native to higher Idaho elevations, this penstemon can take part shade in the valleys.
Syringa or Mock Orange is a deciduous shrub with lovely four petaled flowers, incredible fragrance. In the wild, syringa grows in variety of habitats, from streambanks to lava flows. Can adjust to very low water sites. Idaho state flower.
Rock Soapwort is a vigorous, low creeping plant, useful for spilling down sunny slopes or over rock walls. Plants form a low mound of bright-green leaves, literally smothered by starry bright-pink flowers in late spring or early summer. Also useful as an edging in the sunny border, and worth considering in tubs or pots. Prune plants back hard immediately after blooming, to maintain a compact habit.