[Cluster Lilies: The Genus Triteleia East of the Cascade Mountains of Oregon and Washington]

Bicolored Cluster Lily, Howell's Triteleia, Large-flowered Triteleia

Triteleia grandiflora

Synonyms: Brodiaea bicolor, Brodiaea douglasii var. howellii, Brodiaea howellii, Triteleia grandiflora ssp. grandiflora, Triteleia grandiflora var. howellii, Triteleia howellii

Inflorescence of Bicolored Cluster Lily, Howell's Triteleia, Large-flowered TriteleiaBicolored Cluster Lily, Howell's Triteleia, Large-flowered Triteleia: Triteleia grandiflora (Synonyms: Brodiaea bicolor, Brodiaea douglasii var. howellii, Brodiaea howellii, Triteleia grandiflora ssp. grandiflora, Triteleia grandiflora var. howellii, Triteleia howellii) - Inflorescence of Bicolored Cluster Lily, Howell's Triteleia, Large-flowered TriteleiaBicolored Cluster Lily, Howell's Triteleia, Large-flowered Triteleia: Triteleia grandiflora (Synonyms: Brodiaea bicolor, Brodiaea douglasii var. howellii, Brodiaea howellii, Triteleia grandiflora ssp. grandiflora, Triteleia grandiflora var. howellii, Triteleia howellii)

Inflorescence of Bicolored Cluster Lily, Howell's Triteleia, Large-flowered TriteleiaBicolored Cluster Lily, Howell's Triteleia, Large-flowered Triteleia: Triteleia grandiflora (Synonyms: Brodiaea bicolor, Brodiaea douglasii var. howellii, Brodiaea howellii, Triteleia grandiflora ssp. grandiflora, Triteleia grandiflora var. howellii, Triteleia howellii)

Bicolored cluster lilies as seen on the west bank of the John Day River about one and one-half miles downstream from the Cottonwood Canyon State Park campground........April 6, 2015. The blue-flowered form (former var. douglasii) is also found at this location.

Flowers of Bicolored Cluster Lily, Howell's Triteleia, Large-flowered TriteleiaBicolored Cluster Lily, Howell's Triteleia, Large-flowered Triteleia: Triteleia grandiflora (Synonyms: Brodiaea bicolor, Brodiaea douglasii var. howellii, Brodiaea howellii, Triteleia grandiflora ssp. grandiflora, Triteleia grandiflora var. howellii, Triteleia howellii)The photo at right shows a view down onto the tepals of bicolored cluster lily . Note that the margins of the tepals are only slightly ruffled. Photographed at Memaloose in the central Columbia River Gorge..........April 24, 2006.

Characteristics:

Bicolored cluster lily is a pretty prairie wildflower with a single stem arising from 20-70 cm in height from a deep seated, scaly corm. A pair of linear, grass-like leaves arise from the base of the plant. The leaves are flat but keeled beneath, ranging from 25-50 cm long and from 3-10 mm wide.

The inflorescence is a compact umbel, the pedicels ranging from 5-20 mm long. The flowers consist of six fused tepals, forming a tube about 7 to 10 mm long. The tips of the tepals are free. The color of the tepals is white to fairly deep blue, with deeper blue midline stripes running the length of the tepals. Coastal plants may be a deeper blue. Inland plants are much lighter, helping distinguish them from Douglas' Brodiea where their ranges overlap.

The tepals are generally about the same size and are flared equally away from the tube at about the same level. The outer series of tepals are broadly lanceolate in shape without ruffled edges, the inner series oblong or obovate in shape, sometimes with slightly ruffled margins. The anthers range from yellow to light blue and measure from 2.5-3 mm long.

Bicolored cluster lily is very similar in appearance to Douglas' Brodiea. The latter usually has a more open inflorescence with flowers of a deeper blue hue. In addition, the tepals not equal in shape. The inner are broader and with noticeably ruffled margins, the outer tepals oblong-lanceolate without ruffles to slightly ruffled.

Habitat:
The bicolored cluster lily may be found on the grassy bluffs of coastal headlands as well as on arid prairies and among sagebrush at lower elevations.

Range:

The bicolored cluster lily is found from southwestern British Columbia south through Puget Sound into the Willamette Valley, westward to the coast, and eastward through the Columbia River Gorge into eastern Washington and Oregon, where it is found at it northernmost in southern Chelan and Grant counties in Washington and at its southernmost in Gilliam County in Oregon.


Inflorescence of Bicolored Cluster Lily, Howell's Triteleia, Large-flowered TriteleiaBicolored Cluster Lily, Howell's Triteleia, Large-flowered Triteleia: Triteleia grandiflora (Synonyms: Brodiaea bicolor, Brodiaea douglasii var. howellii, Brodiaea howellii, Triteleia grandiflora ssp. grandiflora, Triteleia grandiflora var. howellii, Triteleia howellii) - Inflorescence of Bicolored Cluster Lily, Howell's Triteleia, Large-flowered Triteleia: Triteleia grandiflora (Synonyms: Brodiaea bicolor, Brodiaea douglasii var. howellii, Brodiaea howellii, Triteleia grandiflora ssp. grandiflora, Triteleia grandiflora var. howellii, Triteleia howellii)

The photo at left shows a close-up view of the inflorescence of bicolored cluster lily as seen on a knoll alongside Oregon Highway 206 about one and a half miles west of the John Day River of north-central Oregon.........April 8, 2007. The photo at right shows the inflorescence of bicolored cluster lily as observed on balds at Brooks Memorial State Park off US 97 near Satus Pass.......June 1, 2019..

Bicolored Cluster Lily, Howell's Triteleia, Large-flowered Triteleia: Triteleia grandiflora (Synonyms: Brodiaea bicolor, Brodiaea douglasii var. howellii, Brodiaea howellii, Triteleia grandiflora ssp. grandiflora, Triteleia grandiflora var. howellii, Triteleia howellii) - Bicolored Cluster Lily, Howell's Triteleia, Large-flowered Triteleia: Triteleia grandiflora (Synonyms: Brodiaea bicolor, Brodiaea douglasii var. howellii, Brodiaea howellii, Triteleia grandiflora ssp. grandiflora, Triteleia grandiflora var. howellii, Triteleia howellii)

Bicolored cluster lily blooming along the Hard Stone Trail, Cottonwood Canyon State Park and adjacent BLM lands......March 26, 2021.

Flowers of Bicolored Cluster Lily, Howell's Triteleia, Large-flowered TriteleiaBicolored Cluster Lily, Howell's Triteleia, Large-flowered Triteleia: Triteleia grandiflora (Synonyms: Brodiaea bicolor, Brodiaea douglasii var. howellii, Brodiaea howellii, Triteleia grandiflora ssp. grandiflora, Triteleia grandiflora var. howellii, Triteleia howellii) - Inflorescence of Bicolored Cluster Lily, Howell's Triteleia, Large-flowered Triteleia: Triteleia grandiflora (Synonyms: Brodiaea bicolor, Brodiaea douglasii var. howellii, Brodiaea howellii, Triteleia grandiflora ssp. grandiflora, Triteleia grandiflora var. howellii, Triteleia howellii)
Bicolored cluster lily as seen at left at Memaloose in the central Columbia River Gorge.........April 24, 2006. The photo at right shows bicolored cluster lily blooming on scablands in open garry oak forest at Brooks Memorial State Park....June 4, 2021.

Paul Slichter