Apiaceae
Perideridia gairdneri

Gairdner's Yampah

Erect, slender plant smelling like caraway. Basal leaves with blade divided 1–2 times pinnately into 3–5 pairs of 1–12 in. long, narrow segments; stem leaves less divided. Leaves wither at flowering. Umbels have uneven, spreading to ascending stalks, each bearing few to many clusters of 15–40 white to pinkish flowers. Grows in spring-wet meadows, near streams or coastal flats to alpine meadows. Subsp. borealis has 5–7 veins in the flower petals; grows from coast to alpine. Subsp. gairdneri has a single vein in the flower petal; grows only at low elevations. Similar P. oregana is smaller, with broader and better-developed bractlets.

  • Rarity: Common
  • Flowering Time: Late Summer
  • Life Cycle: Perennial
  • Height: 1--4 feet
  • Habitat: Meadow, East-Side Forest, Subalpine, Coastal, Vernal Wet, West-Side Forest
  • Found In: Siskiyous, East Gorge, Steens, Wallowas, Olympic NP, N Cascades NP
  • Native: Yes