Philadelphus lewisii
Syringa is a woody shrub, growing 5 to 10 feet tall, that covers itself in clusters of white, four-petaled flowers each late spring. The blossoms carry a heavy, sweet fragrance often compared to orange blossom — hence the common name "mock orange." It was collected along the Clark's River in 1806 and later named in honor of Meriwether Lewis, who documented the plant during the Lewis and Clark Expedition.
Idaho's legislature designated syringa the official state flower in 1931, replacing the wild rose. It had already appeared on the state seal decades earlier, and it remains protected under Idaho law, meaning it's illegal to collect wild specimens from public land without authorization.
Lupinus polyphyllus
Lupine's tall, dense spikes of pea-like purple-blue flowers are one of the signature sights of a Northwest meadow in bloom. A member of the pea family, it fixes nitrogen in the soil, quietly improving the ground for the plants around it. There are roughly twenty related lupine species across the region, but broadleaf types like this one are by far the most commonly seen.
Castilleja miniata
What looks like a brush dipped in red-orange paint isn't petals at all — the showy color comes from modified leaves called bracts, which surround the plant's small, tubular true flowers. Paintbrush is partly parasitic, tapping into the root systems of neighboring grasses and shrubs for extra water and nutrients, which is part of why it's notoriously difficult to transplant into a home garden.
Trillium ovatum
Also called western wake-robin, the trillium is one of the first flowers to appear on the forest floor each spring, its three broad white petals standing out against the shade of Douglas-fir and cedar. As the bloom ages over a week or two, the petals slowly blush from white to a deep pink before fading. Trilliums are slow growing — a single plant can take seven years or more from seed before it produces its first flower.
Camassia quamash
In late spring, wet meadows across the Northwest turn a rippling blue-violet as camas comes into bloom — early travelers reportedly mistook large camas fields for lakes at a distance. The plant grows from an edible bulb that was a staple food source for Native peoples of the Northwest for thousands of years, traditionally slow-roasted in earthen pits until sweet.
At a glance
A rough month-by-month look at bloom windows across the lower-elevation Northwest. Exact timing shifts with elevation, latitude, and the weather in a given year.